机械设计外文翻译(中英文)知识讲解
机械设计制造及自动化中英文对照外文翻译文献
机械设计制造及⾃动化中英⽂对照外⽂翻译⽂献中英⽂对照外⽂翻译⽂献(⽂档含英⽂原⽂和中⽂翻译)使⽤CBN砂轮对螺杆转⼦进⾏精密磨削的⽅法摘要：针对⾼精度加⼯螺杆转⼦，这篇论⽂介绍了利⽤⽴⽅氮化硼（CBN砂轮）对螺杆转⼦进⾏精密磨削的加⼯⽅法。
⾸先，使⽤⼩型电镀CBN砂轮磨削螺杆转⼦。
精确的CBN砂轮轴向轮廓的模型是在齿轮啮合理论的基础上建⽴开发的。
考虑到螺杆转⼦和涂层厚度之间的间隙，主动砂轮的修整引⼊了CBN的砂轮的设计⽅法。
主动砂轮的形状采⽤低速电⽕花线切割技术（低速⾛丝线切割机）进⾏加⼯线CBN主动砂轮的成形车⼑采⽤低速⾛丝机切割机进⾏加⼯。
CBN螺杆转⼦砂轮采⽤本⽂提出的原理进⾏有效性和正确性的验证。
电镀CBN砂轮对螺杆转⼦进⾏加⼯，同时进⾏机械加⼯实验。
在实验中获得的数据达到GB10095-88五级认证。
关键词： CBN砂轮精密磨削螺杆转⼦砂轮外形修整专业术语⽬录：P 螺杆转⼦的参数H 螺杆转⼦的直径Σ砂轮和转⼦的安装⾓度Au 砂轮和转⼦的中⼼距8 螺旋转⼦接触点的旋转⾓x1, y1, z1:转⼦在σ系统中的位置x, y, z: 砂轮端⾯的位置x u ,y u ,z u: x, x y z轴的法向量n x ,ny,nz:X Y Z轴的端⾯法向量n u , nu, nu:砂轮的⾓速度的⽮量:砂轮模块的⾓速度wu:螺旋转⼦的⾓速度w1螺旋转⼦模块的⾓速度转⼦接触点的⾓速度转⼦表⾯接触点的初始速度砂轮表⾯接触点的⾓速度砂轮表⾯接触点的初始速度l砂轮的理论半径砂轮轴的理想位置砂轮表⾯的修改半径砂轮轴的修改位置砂轮表⾯的法向量1.引⾔螺旋转⼦是螺杆压缩机、螺钉、碎纸机以及螺杆泵的关键部分。
转⼦的加⼯精度决定了机械性能。
⼀般来说，铣⼑⽤于加⼯螺旋转⼦。
许多研究者，如肖等⼈[ 1 ]和姚等⼈[ 2 ]，对⽤铣⼑加⼯螺旋转⼦做了⼤量的⼯作。
该⽅法可以提⾼加⼯效率。
然⽽，加⼯精度低和表⾯粗糙度不⾼是其主要缺点。
机械设计中英文外文翻译文献
(文档含英文原文和中文翻译)中英文资料外文翻译Fundamentals Of Machinery DesignThis introductory chapter is a general survey of machinery design．First it presents the definition and major role of machinery design，the relationship between machineryand its components．Then it gives an overview of machinery design as a fundamental course and outlines a general procedure of machinery design followed by all the engineers．Finally, it lists the contents of the course and the primary goals to be achieved．1．1 The role of machinery designMachinery design is to formulate all engineering plan．Engineering in essence is to utilize the existing resources and natural law to benefit humanity．As a major segment of engineerin，machinery design involves a range of disciplines in materials，mechanics，heat，flow，control，electronics and production．Although many hightechnologies are computerized and automated，and are rapidly merged into Our daily life，machines are indispensable for various special work that is difficult or impracticable to be carried out by human．Moreover，machinery can significantly improve efficiency and quality of production，which is crucial in current competitive global market．In the modern industrialized world，the wealth and living standards of a nation are closely linked with their capabilities to design and manufacture engineering products．It can be claimed that the advancement of machinery design and manufacturing can remarkable promote the overall level of a country’s industrialization．Those nations，who do not perform well in design and manufacture fields，are not competitive in world markets．It is evident that several countries that used to be leaders in the design and manufacturing sectors until the l 960s and the1 970s had，by the l990s，slipped back and lost their leadership．On the contrary, our Country is rapidly picking up her position in manufacturing industry since the l 9 80s and is playing a more and more vital role in the global market．To accelerate such an industrializing process of our country, highly skilled design engineers having extensiveknowledge and expertise are needed．That is why the course of machinery design is of great significance for students of engineering．The course of machinery design is considerable different from those background subjects in science and mathematics．For many students，it is perhaps one of their basic professional engineering courses concerned with obtaining solutions to practical problem s．Definitely these solutions must clearly represent an understanding of the underlying science，usually such an understanding may not be sufficient，empirical knowledge or engineering judgement has to be also involved．Furthermore，due to be professional nature of this subject，most design problems may not have one right solution．Nevertheless it is achievable to determine a better design from all feasible solutions．1．2 Machinery and componentsA state-of-the-art machine may encompass all or part of mechanical，electrical，control，sensor，monitoring and lubricating sub—systems．Intermsof the functions of those parts，the machine can also be viewed to be comprised of power，transmission，execution and control／manipulation parts．Regardless of the complexity, however，the major functional part may be still the mechanical system．Forconvenience of analysis，the mechanical system can be decomposed int0．mechanisms that are designed to execute some specific tasks．And the mechanism can be further decomposed into mechanical components．In this sense，the mechanical components are the fundamental elements of machinery．On the whole，mechanical components can be classified as universal and special components．Bolts，gear and chains are the typical examples of the universal components which can be used extensively in different machines across various industrial sectors．Turbine blades，crankshaft and aircraft propeller are the examples ofthe special components，which Can be used extensively in different machines across various industrial sectors．turbine blades，crankshaft and aircraft propeller arethe examples of the special components，which are designed for some specific purposes．In addition to this，if a number of components are manufactured，assembled and even equipped as an individual system，e．g．leaf spring setin a vehicle，it is also termed as a mechanical part．A good machine definitely requires quality individual components．Thus，the design of components is very important．When designing a machine，on the otherhand，engineers invariably find that requirements and constraints of its components areinterrelated．As a local portion，the component is expected to play a certain role on the machine and therefore must be appropriately restrained by the whole system．The design of a gear drive in a speed—reducer，for instance，depends upon not only the strength and stiffness，but also the space available for the gears in the shaft and relation with other transmission drive．This means that the design of the mechanical components inevitably requires a whole view in the whole system．Due to relationship between a machine and its components，the process of machinery design usually covers interconnected designs of machine，parts，and components．Any modification and adjustment in one component may considerably affect the designs of other components or parts．To present the best possible design solution，the iteration of evaluation，analysis and optimization across all the process seem indispensable．1．3 Overview of machinery designThis course is primarily concerned with the design of specific components of machines or mechanical systems．Competence in this area is basic to the consideration and synthesis of complete machines and systems in subsequent courses and professional practice．It Can be seen that even the design of a single bolt or spring needs the designer’s thorough understanding of the principles and methods ofmachinery design together with empirical information，good judgment and even a degre3e of ingenuity in order to produce the best product for the society today．It is natural that designing engineers give first consideration to the functional and economic aspects of new products or devices．Machinery design needs to ensure safetyand reliability in a prescribed lifetime．To address such a problem conventionally，the technical consideration of the mechanical component design is largely centered around two main areas of concerns：(1) strength-stiffness-stability criteria involving the bulk of a solid member and (2) surface phenomena including friction，lubrication，weal7，and environmental deterioration．However，in comparison with such relatively straightforward computations as stress and deflection，the design determination of safety and reliability is likely to be an elusive and indefinite matter，complicated by psychological and sociological factors．It must be kept in mind that safety and reliability are inherently relative to each other，and the value judgmentsmust be made with regard to trade—offs between safety，reliability，cost，weight，and soforth．On the other hand，a practical design needs to reflect clearly manufacturability and economy to make sure of the lowest cost as well as the least consumption of energy and materials．Otherwise，the products or devices designed will be of no further engineering or commercial interests．Nowadays，the simultaneous considerations of manufacturing and assembly factors phases including design，manufacturing，inspection，asassembly and other is considered in such a parallel fashion that the quality and cost arebest satisfied concurrently．In addition to these traditionally technological and economic considerations fundamental to the design and development of mechanical components and systems，the modern engineers have become increasingly concerned with the broader considerations of sustainability，ecology，aesthetics，ergonomics，maintainability，andoverall quality of life．It is clear that a greater than ever engineering effort is being recently devoted to broader considerations relating to the influences of engineered products on people as well as on the environment．The following is a list of general factors for engineers to consider in the design process，which from a different viewpoint shows us a panoramic picture with regard to the design-related activities and tasks．(1) Cost of manufacturing．Will the selling price be competitive? Are there cheaper ways of manufacturing the machine? Could other materials be used? Are any special tools，dies, jigs，or fixtures needed? Can it easily be inspected? Can the workshop produce it? Is heat treatment necessary? Can parts be easily welded?第4页Cost of operation．Are power requirements too large? What type of fuelwill be used? Will operation cost be less expensive?(3) Cost of maintenance．Are all parts easily accessible? Are access panels needed? Can common tools be used? Can replacement parts be available?(4) Safety features．Is a suitable factor of safety used? Does the safety factor meet existing codes? Are fuses，guards，and／or safety valves used? Are shear pins needed? Is there any radiation hazard? Any overlooked ”stress raiser”? Are there any dangerous fumes?(5) Packaging and transportation．Can the machine be readily packaged for shipping without breakage? Is its size suitable to parcel post regulations, freight car dimensions，or trailer truck size? Are shipping bolts necessary? Is its center of gravity in a desirable location?(6) Lubrication．Does the system need periodic checking? Is it automatic? Isit a sealed system?(7) Materials．Are chemical，physical，and mechanical properties suitable to its use? Is corrosion a factor? Will the materials withstand impact? Is thermal or electrical conductivity important? Will high or low temperatures present any problem? Will design stress keep parts reasonable in size?(8) Strength．Have dimensions of components been carefully calculated? Have all the load cases be taken into account? Have the stress concentrations been carefully considered? Has the fatigue effect be computed?(9) Kinematics．Does it provide necessary motion for moving parts? Are rotational speeds reasonable? Could linkages replace cams? What will be the best choice，the belts，chains or gears? Is intermittent motion needed?(10) Styling．Does the color have eye appeal? Is the sharp desirable? Is the machine well proportioned? Are the calibrations on dials easily read? Are the controls easy to operate?(11) Drawings．Are standardized parts used? Are the tolerances realistic? Is the surface finish over-specified? Must the design conform to any standards?(12) Ergonomics．Has the operator of the equipment been considered? Are the controls conveniently located to avoid operator fatigue? Are knobs，grab bars，hand wheels，levers，and dial calibrations of proper size to fit the average operator?1．4 A general procedure of machinery designWhatever design tasks the designers are expected to complete，theyalways，consciously or unconsciously，follow the similar process which goes as follows：(1)Studies of feasibilityAfter understanding the product functions，operational conditions，manufacturing constraints and key technologies，go on to uncover existing solutions to some similar problems so as to clarify the design tasks，understand the needs，present the major functional parameters and evaluate design tasks，proposal of design aims，and feasibility analysis．(2) Conceptual design of configurationAccording to the design of tasks and functional parameter，designs need to extensively search for various feasible configurations and alternatives．Forconvenience，usually，the system can be analyzed comprehensively by decomposing itinto power sources，transmission and work mechanisms．A great effort needs to be devoted to the analysis and synthesis of these different parts．For example，the power source may be selected from motor，engine and turbine．Each power source may have a range of power and kinematical parameters ．Similarly, power trains may have numerous optionsavailable，e．g．belts，chains，gears，worm gears and many other drives．Obviously selecting an appropriate configuration would guarantee the Success of the whole design and the quality of the products．To make a best possible decision，an iterative process is normally required to select，analyze，compare and evaluate different configurations．At this stage，the goals involve sketching of configuration，determination of kinematical mechanisms，and evaluation of functional parameter(power and kinematics)．(3)Detailed technical designBased on the design of configuration and parameters，a number ofassembly and component drawings will be completed to reflect the detaileddesign including kinematics，power，strength，stiffness，dynamics，stability，fatigue and SO on．Consideration should also be given to manufacturingfactors by presenting structural details，materials，and both geometricand dimensional tolerances．This part of work will also be carried out ina repeated process in drawings，calculation，evaluation and modificationuntil a best possible design is achieved．The goal at this stage is tocomplete assembly and component drawings，structural details，design calculations and detailed technical documentations．(4)Modification of designAfter the design is completed，a prototype is usually made for a more realistic physical assessment of the design quality．This will help correct any drawback or fault that may be overlooked or neglected during the design process．At this stage，the goal is to correct the design imperfection，test the potential manufacturing or assembly flaws and refine /improve design．1．5 Contents and tasks of the courseThe course Machinery Design will cover the following contents：(1)Preliminaries．the fundamental principles of machinery andComponents design，design theory，selection of materials，structure，friction，wear and lubrication．(2)Connection．sand．joints．thread．fasteners，keys，rivets，welds，bonds ．and adhesive and interference joints．(3)Transmission．screws，chains，belts，gears，worms，bevel．gearsAnd helical gears．(4)Shaft．system．rolling—contact．bearings，slidingbearings，clutches，couplings，shafts，axles and spindles．(5)Other part s．springs，housings and frame s．The course centers on engineering design of mechanical components andis in a category of fundamental methodology and procedure．It is notfeasible or realistic for the students to become involved in the detaileddesign considerations associated with all machine components．Instead，the textbook has its main focus on some typical components and parts．However，the methodologies and procedures to be developed in this course can beextended to more design cases．For this reason，an emphasis will be laidon the methods and procedure s over the course so that the student s willgain a certain competence in applying these skills and knowledge todesigning more mechanical components．As a professional fundamental course，it will help students to acquirea sol id knowledge of mechanical design and engineering awareness．More specifically，the course will help to develop the students’ competence inthe following facets：Competence of creative design and solving practical problem；Competence of team work as well as professional presentation and communications：Competence of apprehending the design principles andregulations，synthesizing the knowledge to develop new designs：Competence of engineering research as well as using designcode s，handbooks，standards and references：Competence of doing experiments to solve problem in the design oftypical components：Competence of understanding newly introduced technological as well aseconomic codes to update the knowledge of machinery design．It is worth noticing that the course will also integrate a number ofpreceding relevant subjects at the university—level ，including mathematics ，physics，electronics，chemistry，solid mechanics，fluid mechanics，heat transfer，thermodynamics，computin9，and so forth．It will combine the knowledge about science and professional skills to solve some practical engineering problems，which will significantly advance students’ competence and enlarge their vision to the professional engineers．It should be pointed out that skills and experience could beacquired only by a great deal of practice——hour after monotonous hour ofit．It is acknowledged universally that nothing worthwhile in life canbe achieved without hard work，often tedious，dull and monotonous，and engineering is no exception．机械设计的基本原则这个导言章节是对机械设计的一个纵览。
机械专业英语(章跃版)课后英汉翻译讲解
第一章：应力与应变1.That branch of scientific analysis which motions, times and forces is called mechanics and is made up of two parts, statics and dynamics.研究位移、时间和力运动乘力是科学分析法的一个分歧，被称作力学，力学由两大部分组成，静力学和动力学。
2.For example, if the force operating on a sleeve bearing becomes too high, it will squeeze out the oil film and cause metal-to-metal contact, overheating and rapid failure of the bearing.例如：如果止推轴承上的作用力过大的话，会挤出油膜，引起金属和金属之间的相互接触，轴承将过热而迅速失效。
3.Our intuitive concept of force includes such ideas as place of application, direction, and magnitude, and these are called the characteristics of a force.力的直观概念包括力的作用点、大小、方向，这些被称为力的三要素。
4.All bodies are either elastic or plastic and will be deformed if acted upon by forces. When the deformation of such bodies is small, they are frequently assumed to be rigid, i.e., incapable of deformation, in order to simplify the analysis.所有的物体既可以是弹性的也可以是塑性的，如果受到力的作用就产生变形。
机械设计过程外文文献翻译、中英文翻译
附录英文Machine design processThe machine is the organization with other components combinations, transforms，the transmission or using the energ，the strength or the movementexample for the beneficial use has the engine．the turbine wheel，the vehicles．the hoist，the printer，the washer and the movie camera Many is suitable tbr themachine design principle and the strength law also is suitable to is not thegenuine machine finished product．the driven wheel hub and the file cabinet tothe measuring appl iance and the nuclear pressure vessel．”Machine designt thisterminology compared to”machine design”more generalized，it including machine design．But regarding certain instruments．1ike uses to determine hot，the mobile line and the volume thermal energy as well as the fluid aspect question needs alone to consider．But when machine design must consider themovement and the structure aspect question as well as preserved and the sealstipulation．In the mechanical engineering domain and all that project domainapplication machine design，all need such as mechanism and so on the svdtch,cam，valve，vessel and mixer．The design beginning tO being true or the imagination need．The existing instrument possibly needs in the durability，the efficiency，the weight，the speedor the cost performs to improve．]he possible need new instrument tO completebefore made the function by the person．1ike t was abundant Assembly or maintenance．After the goal completely or partially determines，the design nextstep is the idea carl complete needs the ffmction the organization and its thearrangement for this，the free hand drawing schematic diagram value is enormous，it not only takes a person idea the recording and the auxiliary．methodwhich if the other people discusses，moreover especially is suitable for with ownidea exchange，also needs to concern as the creative mentality stimulant to thepart widespread knowledge，because a new machine frequently by knew very well each kind of components rearrange or the replace become，perhaps changedthe size and the material．Regardless of after idea process or，a designer callcarry on fast either the sketchy computation or the analysis determines thegeneral size and the feasibility．After about need or may use the spatial meteidea determination，may start according to the proportion picture schematicdiagram．When several components approximate shapes and several sizes come out，the analysis was allowed truly to start．The analysis goal lies in enable it to havesatisfying or the superior performance，as well as will seek the best proportionand the size under the smallest weight security and the durability and thecompetitive cost designer for each essential load bearing section，as well asseveral components intensities balance then choice material and processingmethod．These important goals only have through only then may obtain based on the mechanism analysis，like about reacting force and friction most superioruse principie of statics；About inertia，acceleration and energy principle ofdynamics：About stress and deflection material elasticity and intensity principle；About material physical behavior principle；About lubrication and water poweractuation hydromechanics principle．The analysis may identical engineer whicharranges by the idea machinery do，or makes the analysis in the big company bythe independent analysis department or the research group the result，possibleneed new arrangement and new size．No matter is officially does orunofficialdoes，supposes Japan is relapse and the cooperation process．the analysis staffmay play the role to all stages but not merely is he stage.Some design criteriaIn this part，some people suggested carries on the analysis using the creative manner，this kind of analysis may cause the significant improvement aswell as to the spare product idea and the consummation，the product functionmore．more economical，is perhaps more durable． The creation stage does notneed is at first and the independent stage．Alttlough the analysis staff possiblycertainlv is not responsible for the entire design，but he not meyely is can fromthe numeral proposc wants question correct answer which he soIVes，not merelyis Droduces the stress value，the size or the work limit. He may propose a morewidespread opinion，in order to improvement standard or plan. Because beforethe analysis or in the analysis process，he can familiar install and its the workingcondition．he is in an idea to prepare chooses the plan the rantage Poinl．Best hecan propose the suggestion transfigure eliminates the moment of force or thestress concentration，but was not the permission constructs has the blgsectlonand the excessively many dynamic loads organization should better be he discards his careful desi{；n but is not afterwards saw the machinery discarded.In order to stimulate the creative thought，below suggested designs thepersonnel and the analysis staff uses the criterion.The first 6 criteria especially are suitable for the analysis staff,although he possibly involves to possesses this l o items.1．Creatively the use needs the physical performance and the control doesnot need．2．Knows the practical load and its the importance.3．D00s not consider the function load in advance.4．Invents the more advantageous loading environment.5．Provides the minimurn weight the most advantageous stress distributionand the rigidity．6．uses the fundamental equation computation proportion and causes thesize optimization．7．The selection material obtains the perlbrmance combination．8．In between spare parts and integrated components carefid choice． 9．Revisions functional design adapts the production process and reduces thecost．10．In the consideration assembly causes the part pintpointing and mutuallydoes not disturb．Designs the personnel to have in such domain，like the statics，the inematics，dynamics and the materials mechanics have the good accomplishment，in addition．but also must familiar make the material and themanufacture craft．Designs the personnel to have to be able to combine allcollrelations the fact，carries on teaches Wei．the manufacture schematic diagramand the charting comes the manufacture request totransmit the workshop． Any product design one of first step of work is the choice uses in to makeeach part the material．Today design personnel may obtain innumerably．When choice，the product function，the outward appearance，the material cost and theproduction cost very are all important．Before any computation must carefullyappraise the material the performance．It is the necessary careful computation toguarantee the design the validity The computation ever does not appear on thechart，but is saved by ten each kind of reason．Once any part expires，had makeclear when is designing at first this had the flaw the components has made any；Moreover，。
机械设计外文文献翻译、中英文翻译
机械设计外文文献翻译、中英文翻译unavailable。
The first step in the design process is to define the problem and XXX are defined。
the designer can begin toXXX evaluated。
and the best one is XXX。
XXX.Mechanical DesignA XXX machines include engines。
turbines。
vehicles。
hoists。
printing presses。
washing machines。
and XXX and methods of design that apply to XXXXXX。
cams。
valves。
vessels。
and mixers.Design ProcessThe design process begins with a real need。
Existing apparatus may require XXX。
efficiency。
weight。
speed。
or cost。
while new apparatus may be XXX。
To start。
the designer must define the problem and XXX。
ideas and concepts are generated。
evaluated。
and refined until the best one is XXX。
XXX.XXX。
assembly。
XXX.During the preliminary design stage。
it is important to allow design XXX if some ideas may seem impractical。
they can be corrected early on in the design process。
机械设计常用英汉(意、德)词典
CCable电缆Cavo (sost.)Kabel, Drahtseil - hauling c.拖缆- c. di trazione Zugseil- c. length电缆长度- lunghezza c.Cadmiun plating镀镉Cadmiatura Verkadmien Caisson沉箱, 防水箱,Cassone KastenCalcium钙Calcio Kalzium Calculation计算CalcoloCalibrate校准Tarare Eichen, kalibrieren Calibration block校准块Blocco di calibrazioneCalender砑[轧]光机;压延机;轮压机Calandra KalanderCalorific power卡值, 热值, 发热量Potere calorifico Brennwert, Heizwert heat capacity热容量WärmeinhaltCam棒材Camma Nocken Cancellation取消AnnullamentoCap帽CappuccioCap nut螺帽Dado a calotta sfericaCap screw帽螺钉Vite a testa sfericaCap, hood帽，罩Cappuccio KappeCapacitor电容器Condensatore Kondensator Capacity容量,生产量,能力PotenzialitàCapacity容量,生产量,能力CapacitàLeitungsfähigkeit- water equivalent水当量- c.termica Wasserwert Capsule包套; 容器Capsula KapselCarbon碳Carbone KohleCarbon碳Carbonio KohleCarbon elimination除碳Affinazione Frischen Carbonization碳化，渗碳（处理）Degassaggio Entgasung Carburize渗碳Cementare Zementieren Cardan shaft万向轴Albero cardanicoCarpentry木工; 木器Carpenteria- steel structure钢结构- c. metallica Rahmengestell Carriage车架CarroCarrying roller支承辊，传送辊Rullo di trasportoCartridge夹头, 卡头, 管头Cartuccia Patrone- oil filtering c.滤气器滤筒- c. filtrante- filtereinsatz Case箱,盒;壳;套;框架Custodia TascheCase hardened表面硬化CementatoCase hardening表面硬化Cementazione Aufkohlen Casing (crankcase)曲柄轴箱Carter (bas. motori)Geheause- oil sump油槽, 油(沉淀)池- c. dell'olioCast iron铸铁Ghisa Gusseisen- pig iron生铁- g. grezza Roheisen- pig iron for steelmaking炼钢生铁- g. affinataCast joint浇铸连接, 铸焊Giunto di fusioneCast on铸造，浇补Fuso Angegossen Cast steel铸钢Acciaio (fusione)Cast, casting, pouring铸Colata , fusione Guss,Schmelze - continuous c.连铸- c. continua Stranggiessen - pit-casting地坑铸件- c. in fossa Guss in der- ingot pouring铸锭, 模铸锭- c. in lingotto Blockguss- suction c.抽吸浇注,真空铸造- c. sottovuoto Vakuumguss Catalogue目录CatalogoCategory种类, 部属; 类目CategoriaCaution警告AttenzioneCaution signal注意[警告]信号Segnale di attenzioneCavity, recess洞，空穴CavitàHohlraum- shrinkage c.缩孔- c. di ritiro LunkerCellar地下室CantinaCenter distance中心距InterasseCentering定心CentraggioCentering holes定心孔Fori da centroCentering pins定心销Spina di centraggioCenterline中心线MezzeriaCentigrade百分度的,摄氏温度的Centigrado ZentigradCentre(Center)中心Centro Mittelpunkt- c. hole中心孔- c. foroCeramic fibre陶瓷纤维Fibre ceramicheChain链Catena Kette- roller chain滚子链- c. a rulli Rollenkette- power track托链- c. portacavi- c. drive链传动- comando c.- c. wheel链轮- ruota per catenaChair椅子Sedia StuhlChamber室，腔Camera Kammer- cooling c.冷却腔- c. di raffreddam.Kühlkammer Chamfer圆角, 倒角, 倒棱SmussareChamfer圆角, 倒角, 倒棱Smussatura Abschrägung Chamfer圆角, 倒角, 倒棱SmussoChamfered圆角, 倒角, 倒棱SmussatoChange of section变截面Cambiamento di sezione Formatwechsel Change, replace换，取代Cambiare Ersetzen Channel, groove, slot沟，槽Scanalatura Rinne Characteristic feature特征Caratteristica Eigenschaft Kennlinie - characteristic data特性参数- dati catteristici KennzahlenCharge负荷Carica Beschickung Einsatz Charge, load负荷Caricare BelastenCharge, load负荷Carico Beanspruchung Druck - ult. tensile strength抗张强度- c. di rottura Bruchspannung- peak load最大负荷- c. massimo Spitzenbelastung- working load工作负荷- c. di lavoro- elastic limit load弹性极限载荷- c. lim. di elasticità- yield strength屈服强度- c. di snervamentoChart图表GraficoChart图表Tabella Schaubild, TafelChart图表Diagramma Diagramm Karte- flow diagram流程图- d. di flusso FlussbildCheck, test,检查，检验Controllo Steuerung, Prüfung Regelung - level control标准控制- c. del livello Niveau-Regelung- quality control质量管理, 质量控制- c. qualitativo GüteüberwachungCheck检查，检验Revisione Regelung- general overhaul常规检查- r. generale GeneralüberholungChock楔子;轧辊轴承(座);塞块;GuarnituraChrome铬CromareChromium铬Cromo Chrom- c. thickness铬- cromatura a spessoreChromium-plated镀铬; 铬镀层CromatoChromium-plating镀铬; 铬镀层CromaturaChute斜槽; 滑槽;Scivolo (canale)RutscheCircle圆周, 圆形物,Cerchio ReifenCircuit电路,回路,线路Circuito Kreislauf- trigger c.触发(输入)电路- c. di sgancio- control loop控制系统- c. regolatore Regelkreis- cooling c.冷却系统，冷却回路- c. di raffreddam.Kühlkreislauf- electric c.电路- c. elettrico elektrischer Stromkreis Circular圆形的, 循环的Circolare (forma)KreisrundCircolare (verbo)Circulate(使)流通, (使)运行, (使Circulation循环, 流通, Circolazione Umführung Umlauf- water c.水循环- c. dell'acqua Wasserumlauf Circumference周长,周围;圆周,周线Circonferenza UmfangCL pass line轧制中心线Asse linea di laminazioneCL rolls轧机中心线Asse cilindriClamp夹具, 夹钳Staffa, graffa Bügel, Klemme Clamp夹具, 夹钳Clappa- earth terminal接地端子- m. di terra Erdungsklemme - terminal- m. elettrico Klemme Clamping device夹紧装置Dispositivo di bloccagg.Clarifications澄清, 净化ChiarimentiClass, category, grade等级ClasseClassification分级，分类ClassificazioneClearance 间隙， 距离，Luce lichte Weite Clearance (accopp.) 间隙， 距离，Gioco Joch , lichte Weite loose fit (di fissag.)松配合Clockwise direction顺时针方向Senso orario Uhrzeigersinn- counterclockwise d.逆时针方向- s. antiorarioClog, close, plug堵［阻］塞Otturare VerschlussClose关闭Chiudere Schliessen, sperren Closed circuit闭合回路Circuito chiusoClutch离合器Frizione Reibungskupplung Clutch离合器Innestare (frizione)Coating, lining涂［镀，敷，覆盖］层Rivestimento Verkleidung- acid lining酸性内衬- r. acido Saure Auskleidung - basic lining碱性衬里- r. basico Basisches Futter - armour plate装甲板- r. metallico Panzerplatte Coaxial同轴的, 共轴的CoassialeCobble修补IncaglioCock, tap水龙头Rubinetto HahnCode代码,代号,密码,编码CodiceCode, symbol代码,代号,密码,编码SiglaCoil卷Bobina (elettr.)SpuleCoil winder(线材)拉拨机,卷线机Bobinatrice SpulwickelCoil, strip coil带卷Bobina (di nastro)Spule, BundCoil卷Rotolo (di nastro)Rolle wickel- roll, bundle of wire线卷[盘]- r. di filo DrahtbundCold drawn冷拔Trafilare a freddo KaltziehenCold drawn冷拔Trafilato a freddoCollare BundCollar环， 圈； 束套； 轴衬；Column柱Colonna Säule, PfellerComb梳， 篦， 刷， Pettine KammCommerce商业CommercioCommon zone公共区Piano di riferimentoComplete freezing完全冻结Solidificazione compl.Durchgehende Completion 完成， 实现CompletamentoComponent部分； 成分， 组分Componente Bestandteil Component部分； 成分， 组分Organo Triebwerksteile Composition成分, 合成物Composizione Aufbau, Verbindung Compression压缩Compressione Druck, Verdichtung- c. spring压缩弹簧- molla a c.Compressor压缩机Compressore KompressorComputer计算机, 电脑Calcolatore RechnerConcavity凹度ConcavitàHöhlungConcavity凹度RientroCondition, state整理(修);精(修)整Stato Zustand- finish修理, 精修- s. della superficie Oberflächenbeschaffenheit Condition, state条件Condizione Beschaffenheit, Lage- initial condition初始条件;输入条件;原始数据，- c. iniziale- surface c.表面条件［状态］- c. della superficie Oberflächen b. Conditioning（空气湿度等）调节，CondizionamentoConduction传导Conduttore, linea el.Leitung Conductivity传导性, 传导率ConduttivitàLeitfähigkeit Conduit, duct管道, 导管Condotto Leitung, Röhre- suction duct吸入管- c. di aspirazione Absaugkanal- discharge duct排放管- c. di scarico Abzugsrohr- cooling water c.冷却水管- c.acqua raffredd.Conduit, pipe导管;水管,水道;油管Canalizzazione Leitungsführung Cone圆锥形， 锥形物，Cono Kegel Configuration结构; 构造;Configurazione Anordnung Conical圆锥的, 圆锥形的Conico konisch Connecting rod连杆Biella Pleuel- oscillating cranck摆动曲柄杆- b. oscillanteConnection连接， 衔接， 结合Collegamento Schaltung, Leitung Connection连接， 衔接， 结合Connessione, innesto Verbindung Connection连接， 衔接， 结合Raccordo Anschluss Connector连接器ConnettoreConstant (for adjustm.)稳定的， 不变的Costante (per regolaz.)Constant power恒功率Potenza costanteConstant torque恒转矩Coppia costanteConstruction结构， 构造Costruzione Konstruktion, Bauart Consumption消费;消尽; 消耗Consumo verbrauch- water c.水消耗- d'acqua Wasserverbrauch- energy c.能量消耗- d'energia Energieverbrauch- wear 耗损, 磨损- di oggetti (usura)Abnutzung Contact接触，联系Contatto elettr.Kontakt elektrisch Contactor电流接触器Contattore Kontaktgeber Contactor电流接触器Teleruttore SchützContainer容器ContenitoreContainer, vessel容器Recipiente BehaelterContent内容Contenuto GehaltContinuous连续的，持续的Continuo Durchgehend, stetig Continuous casting连铸Colata continuaContraction收缩Contrazione Schrumpfung Contraction收缩Ritiro Schrumpfung Contraction, shrinkage收缩Strizione Einschnürung Control lever操纵杆Leva di comandoControl room控制室Sala di controllo MesswarteControl stand, pulpit控制台Pulpito di comando Steuerstand Schaltpult Operating desk操作台Control; drive控制Comando Steuerung, Antrieb- remote control遥控装置- c. a distanza- fernsteuerung- electric control电气控制- c. elettrico- elektrische s.- hydraulic c.液压控制- c. idraulico- hydraulische s. Conversion变换； 转化；Conversione Umsetzung Conversion变换； 转化；Trasformazione Verwandlung Convert转变为； 兑换为；Convertire Umwandeln Convert转变为； 兑换为；Trasformare Umwandler, Birne Convertible可转换的；可转变的；ConvertibileConvex凸状，凸面，凸圆体Convesso Konvex, erhaben Conveyor运输机Trasportatore- chain c.运输链, 传送链,- t. a catena Kettenförderer Cool, chill 冷的Raffreddare AbkühlenCooler冷却器Refrigerante Kühler, Kühlmittel Cooler冷却器Refrigeratore KuhlerCooling bed冷床Letto di raffredd.Kühlbett, Warmbett Cooling bed冷床Placca diraffreddam.KühlplatteCooling conveyor冷却运输机Tappeto di raffreddam.Cooling冷却Raffreddamento Kühlung- water spray cooling喷水冷却- r. a spruzzo d'acqua- closed c. circuit闭环冷却回路- r. a circuito chiuso Geschlossener Kühlkreislauf - forced circulation c.强制循环冷却- r. a circol. forzata Zwangsumlaufkühlung- controlled c.控制冷却- r. controllato Gesteuerte Kühlung- secondary c.二次冷却- r. secondario Nachkühlung- c. in air空冷- r. in aria calma- c. pipe冷却管- tubo di r.- c. water system冷却水系统- impianto di r.Copper铜Rame Kupfer- c. pipe铜管- tubo di r.CorrispondenteCorresponding相当的， 对应的， 适合Corrosion侵蚀, 腐蚀状态Corrosione Korrosion, Rostung Corrosion-proof防腐Anticorrosivo Korrosionsfest Corrugated起皱的,波状的,有沟纹的Ondulato- c. hose波纹软管- tubo metall. ondulatoCorrugation波形； 槽形OndulaturaCounter计算器, 计数器,Contatore (mecc)Schaltschütz, Zähler Counterbore沉孔， 埋头孔Lamatura (incasso)Counterclockwise反时针方向的Antiorario Gegenuhrzeigersinn Counterpressure roller反压力辊Rullo di contropressioneCounterweight平衡重量Contrappeso GegengewichtCoupling head联接头MancioneCoupling, joint联轴器连接, 活节联轴器Giunto Kupplung- universal joint万向接头- g. cardanico Kardangelenk- flexible coupling弹性联轴节,缓冲接头- g. oscill., flessib.-flange type shaft coupling凸缘联轴节- gear coupling齿轮联轴节- g. a denti winkelbewegliche k.- flange c.法兰式联轴节- g. a flangia Scheibenkupplung- sleeve c. 筒形联轴器- g. a manicotto SchalenkupplungCoupling sleeve连接套筒Manicotto Muffe Couterbore沉孔， 埋头孔Lamare (foro)Cover盖子Coperchio DeckelCover, cap盖子Fondello (coperchio)Bodenscheibe Cover, Cap, top盖子Cappello- c. di presse- crosshead十字头,丁字头,十字接头Cover盖子Coprire- plug塞子- coprire (tappare)Covering覆盖物，覆盖，Copertura Schutz-Abdeckung Crack破裂, 裂缝CriccaCrack破裂, 裂缝Incrinatura SpalteCrack破裂, 裂缝Cricca Schrumpfriss, Spalte- c. a caldo Warmriss- chill c.辊裂印痕;激冷裂纹,冷裂- cold c.冷裂缝- c. a freddo Kalttriss- restriction crack拉裂SchrumpfrissCriccatoCracked有裂缝的,破碎的;破裂的Incrinato RissigCracked有裂缝的,破碎的;破裂的Cracking裂缝, 裂痕Fessurazione RissbildungCradle摇台, 刀具溜板Culla WiegeCrane driver吊车司机Gruista KranfahrerCrane起重机Gru Kran- grab c.抓斗起重机- g. a benna Greiferkran- jib c.动臂[挺杆]起重机- g. a braccio- jib c.动臂[挺杆]起重机- g. a bandiera- gantry c.龙门起重机- g. a cavalletto Bockkran Portalkran - shop overhead c.车间天车, 高架起重机- g. a carropontebridge c.桥式起重机[吊车],行车- dogging c.钳式[夹钳]吊车- g. a tenaglie Zangenkran- magnet c.磁盘吊车- g. elettromagn.Magnetkran- travelling c.移动式起重机- g. mobile StripperlaufkranCrank曲柄,曲轴,手柄,摇把BiellismoCrew全体工作人员,操作人员Squadra ArbeitsgruppeSpuntare AbschneidenCrop末端切下的部分(钢锭等)Crop end切头, 切尾Estremità spuntataCrop end切头, 切尾SpuntaturaCrop-cut切头Intestatura (taglio)Cross越过, 横穿, 渡过Croce, crociera KreuzCross beam, sleeper横梁Traversa SchwellenCross section横截面Sez. trasvers.Cross traverse横向运动Direzione RichtungCrucible坩埚; 熔罐; 熔炉Crogiolo Schmelztiegel Crude oil原油Petrolio greggioCrystallisation晶化,结晶(作用,过程)Cristallizzazione Kristallisation Crystallizer结晶器Cristallizzatore Kokille, Kristallisator Cupola(furnace)熔铁炉, 冲天炉CubilottoCurrent bus母线Canalina elettricaCurrent水[气、电]流Corrente Strom- alternate current交流(电),交变电流,- c. alternata Wechselstrom- direct current直流电; 直流- c. continua Gleichstrom- single phase c.单相电流- c. monofase Einphasenstrom- rated c.反应[额定]电流- c. nominale Nennstrom- c. surge电流浪涌, 电流冲击- c. assorbita Stromstoss- grid current栅极电流- c. di griglia- earth c.接地[大地]电流- c. di terra Erdstrom- three-phase c.三相电流- c. trifase Drehstrom Curved, bent弯曲Curvo, curvatoCurvilinear曲线的,由曲线而成的Curvilineo Gekrümmt Cushion, dampen缓冲(垫);减震垫[器]AmmortizzareCushion, damper,缓冲(垫);减震垫[器]Ammortizzatore Stossdaempfer, Pufferbumper, shock abs.缓冲器Cushioned on带缓冲Ammortizz. suCut off切断Tagliare Abscheren Cutter刀具, 切割机Fresa (utensile)Fraeser Cutting station切割站Posto di taglio Schneidstation Cycle周期，循环Ciclo Ablauf, Periode - working schedule工作进度表- di lavoro- working cycle工作[作业]循环- di lavoro (fasi)Cycles per sec.每秒循环数Periodi al sec.Hertz Cycling, oscillation循环, 振荡OscillazioneCylinder柱体；液压缸，气缸Cilindro (gen.)Zylinder- mill roll轧辊- di laminazione Walze- working roll工作辊- di lavoro- air-hydraulic cyl.气水罐- c. idropneumatico- hydr. cylinder液压缸- c. idraulico- air cylinder气缸- c. pneumatico- z. pneumatik - rotary torque actuator摆动缸- c. rotante- bore dia.缸径- Stelo- stroke行程- Corsa- operating press.工作压力- press. esercizio。
机械设计名词术语汉英对照
阿基米德蜗杆 Archimedes worm安全系数safety factor;factor of safety安全载荷 safe load凹面、凹度 concavity摆动从动件 oscillating follower摆动从动件凸轮机构cam with oscillating follower 摆动导杆机构 oscillating guide-bar mechanism摆杆 oscillating bar摆线齿轮 cycloidal gear摆线齿形 cycloidal tooth profile摆线运动规律 cycloidal motion摆线针轮 cycloidal-pin wheel扳手 wrench板簧flat leaf spring半圆键 woodruff key包角 angle of contact保持架 cage背对背安装 back-to-back arrangement背锥 back cone；normal cone背锥角 back angle背锥距back cone distance比例尺 scale比热容specific heat capacity闭链机构closed chain mechanism闭式链closed kinematic chain臂部 arm变频调速frequency control of motor speed变频器 frequency converters变速 speed change变速齿轮change gear change wheel变位齿轮 modified gear变位系数 modification coefficient变形 deformation标准齿轮 standard gear标准直齿轮standard spur gear表面传热系数surface coefficient of heat transfer 表面粗糙度 surface roughness表面质量系数superficial mass factor并联机构 parallel mechanism并联式组合combination in parallel并联组合机构parallel combined mechanism并行工程 concurrent engineering并行设计 concurred design, CD波发生器 wave generator波数number of waves补偿 compensation不平衡imbalance (or unbalance)不平衡量 amount of unbalance不平衡相位phase angle of unbalance不完全齿轮机构 intermittent gearing参数化设计parameterization design, PD残余应力 residual stress操纵及控制装置 operation control device槽轮 Geneva wheel槽轮机构 Geneva mechanism ；Maltese cross槽数 Geneva numerate槽凸轮 groove cam侧隙 backlash插齿机 gear shaper差动轮系differential gear train差动螺旋机构 differential screw mechanism差速器 differential常用机构 conventional mechanism; mechanism in common use 车床 lathe成对安装 paired mounting承载量系数 bearing capacity factor承载能力 bearing capacity齿槽 tooth space齿槽宽 spacewidth齿侧间隙 backlash齿顶高 addendum齿顶圆 addendum circle齿根高 dedendum齿根圆 dedendum circle齿厚 tooth thickness齿距 circular pitch齿宽 face width齿廓 tooth profile齿廓曲线 tooth curve齿轮 gear齿轮变速箱speed-changing gear boxes齿轮插刀pinion cutter; pinion-shaped shaper cutter齿轮齿条机构pinion and rack齿轮传动系 pinion unit齿轮滚刀 hob ,hobbing cutter齿轮机构 gear齿轮联轴器 gear coupling齿轮轮坯 blank齿式棘轮机构tooth ratchet mechanism齿数 tooth number齿数比 gear ratio齿条 rack齿条插刀rack cutter; rack-shaped shaper cutter 齿条传动 rack gear齿形链、无声链 silent chain齿形系数 form factor尺寸系列 dimension series冲床 punch传动比transmission ratio, speed ratio传动角 transmission angle传动系统 driven system传动轴 transmission shaft传动装置 gearing; transmission gear串级调速cascade speed control串联式组合 combination in series串联式组合机构series combined mechanism 创新 innovation creation创新设计 creation design垂直载荷、法向载荷 normal load唇形橡胶密封 lip rubber seal磁流体轴承 magnetic fluid bearing从动带轮 driven pulley从动件driven link, follower从动件平底宽度width of flat-face从动件停歇 follower dwell从动件运动规律 follower motion从动轮 driven gear粗线 bold line粗牙螺纹 coarse thread打包机 packer打滑 slipping大齿轮 gear wheel带传动 belt driving带轮 belt pulley带式制动器 band brake单列轴承single row bearing单万向联轴节single universal joint单位矢量 unit vector单向推力轴承single-direction thrust bearing 弹性滑动 elasticity sliding motion弹性联轴器elastic coupling flexible coupling弹性套柱销联轴器rubber-cushioned sleeve bearing coupling当量齿轮equivalent spur gear; virtual gear当量齿数equivalent teeth number; virtual number of teeth当量摩擦系数equivalent coefficient of friction当量载荷 equivalent load刀具 cutter倒角 chamfer导程 lead导程角 lead angle导热性 conduction of heat导数 derivative等加等减速运动规律parabolic motion; constant acceleration and deceleration motion等径凸轮conjugate yoke radial cam等宽凸轮 constant-breadth cam等速运动规律uniform motion; constant velocity motion等效动力学模型dynamically equivalent model等效构件 equivalent link等效力 equivalent force等效力矩equivalent moment of force等效量 equivalent等效质量 equivalent mass等效转动惯量 equivalent moment of inertia低副 lower pair底座 chassis点划线chain dotted line垫片密封 gasket seal垫圈 gasket调节 modulation, regulation调速 speed governing调速电动机adjustable speed motors调速器 regulator, governor调速系统 speed control system调心滚子轴承self-aligning roller bearing调心球轴承self-aligning ball bearing调心轴承 self-aligning bearing调压调速 variable voltage control碟形弹簧 belleville spring顶隙 bottom clearance定轴轮系ordinary gear train; gear train with fixed axes动力润滑 dynamic lubrication动力学 dynamics动力粘度 dynamic viscosity动密封 kinematical seal动能 dynamic energy动平衡 dynamic balance动平衡机 dynamic balancing machine动态分析设计dynamic analysis design动态特性 dynamic characteristics动压力 dynamic reaction动载荷 dynamic load端面 transverse plane端面参数 transverse parameters端面齿距 transverse circular pitch端面齿廓 transverse tooth profile端面模数 transverse module端面压力角 transverse pressure angle端面重合度transverse contact ratio锻造 forge对称循环应力symmetry circulating stress对心滚子从动件 radial (or in-line ) roller follower对心曲柄滑块机构in-line slider-crank (or crank-slider) mechanism 对心移动从动件radial reciprocating follower对心直动从动件radial (or in-line ) translating follower多列轴承 multi-row bearing多项式运动规律 polynomial motion多楔带 poly V-belt多质量转子rotor with several masses惰轮 idle gear额定寿命 rating life额定载荷 load rating发生面 generating plane发生线 generating line法面 normal plane法面参数 normal parameters法面齿距normal circular pitch法面模数 normal module法面压力角normal pressure angle法向齿距 normal pitch法向齿廓normal tooth profile法向力 normal force法向直廓蜗杆straight sided normal worm反馈式组合 feedback combining反向运动学inverse ( or backward) kinematics反正切 Arctan反转法 kinematic inversion范成法 generating cutting方案设计、概念设计concept design, CD防振装置 shockproof device仿形法 form cutting非标准齿轮 nonstandard gear非接触式密封 non-contact seal非圆齿轮 non-circular gear非周期性速度波动 aperiodic speed fluctuation飞轮 flywheel飞轮矩moment of flywheel分度线reference line; standard pitch line分度圆 reference circle; standard (cutting) pitch circle 分度圆柱导程角lead angle at reference cylinder分度圆柱螺旋角helix angle at reference cylinder分度圆锥reference cone; standard pitch cone分母 denominator分析法 analytical method分子 numerator粉末合金 powder metallurgy封闭差动轮系 planetary differential复合铰链 compound hinge复合轮系compound (or combined) gear train复合平带 compound flat belt复合式组合 compound combining复合应力 combined stress复式螺旋机构 Compound screw mechanism复杂机构 complex mechanism干涉 interference杆组 Assur group刚度系数 stiffness coefficient刚轮 rigid circular spline刚体导引机构 body guidance mechanism刚性冲击 rigid impulse (shock)刚性联轴器 rigid coupling刚性轴承 rigid bearing刚性转子 rigid rotor钢丝软轴wire soft shaft高度系列 height series高副 higher pair高速带high speed belt格拉晓夫定理 Grashoff`s law根切 undercutting工况系数 application factor工艺设计 technological design工作机构 operation mechanism工作空间 working space工作循环图working cycle diagram工作应力 working stress工作载荷 external loads工作阻力 effective resistance工作阻力矩 effective resistance moment功 work功率 power功能分析设计 function analyses design公称直径 nominal diameter公法线common normal line公共约束 general constraint公制齿轮 metric gears共轭齿廓 conjugate profiles共轭凸轮 conjugate cam构件 link鼓风机 blower固定构件 fixed link; frame固体润滑剂 solid lubricant关节型操作器 jointed manipulator冠轮 crown gear惯性力 inertia force惯性力部分平衡partial balance of shaking force 惯性力矩moment of inertia ,shaking moment惯性力平衡balance of shaking force惯性力完全平衡full balance of shaking force 惯性主矩resultant moment of inertia惯性主失resultant vector of inertia广义机构 generation mechanism广义坐标 generalized coordinate轨迹发生器 path generator轨迹生成 path generation滚刀 hob滚道 raceway滚动体 rolling element滚动轴承 rolling bearing滚动轴承代号rolling bearing identification code 滚针 needle roller滚针轴承needle roller bearing滚珠丝杆 ball screw滚柱式单向超越离合器 roller clutch滚子 roller滚子半径 radius of roller滚子从动件 roller follower滚子链 roller chain滚子链联轴器double roller chain coupling滚子轴承 roller bearing过度切割 undercutting含油轴承 oil bearing函数发生器 function generator函数生成 function generation耗油量 oil consumption耗油量系数oil consumption factor合成弯矩resultant bending moment合力 resultant force合力矩resultant moment of force赫兹公式H. Hertz equation黑箱 black box横坐标 abscissa互换性齿轮 interchangeable gears花键 spline滑动率 sliding ratio滑动轴承 sliding bearing滑键、导键 feather key滑块 slider环面蜗杆toroid helicoids worm环形弹簧 annular spring缓冲装置 shocks; shock-absorber灰铸铁grey cast iron回程 return回转体平衡balance of rotors混合轮系compound gear train基本额定寿命basic rating life基础机构 fundamental mechanism基于实例设计 case-based design,CBD基圆 base circle基圆半径radius of base circle基圆齿距 base pitch基圆压力角pressure angle of base circle基圆柱 base cylinder基圆锥 base cone机电一体化系统设计mechanical-electrical integration system design 机构 mechanism机构分析analysis of mechanism机构平衡 balance of mechanism机构学 mechanism机构运动简图 kinematic sketch of mechanism机构运动设计 kinematic design of mechanism机构综合synthesis of mechanism机构组成 constitution of mechanism机架 frame, fixed link机架变换 kinematic inversion机器 machine机器人 robot机器人操作器 manipulator机器人学 robotics机械 machinery机械创新设计mechanical creation design, MCD机械的现代设计 modern machine design机械调速 mechanical speed governors机械动力分析dynamic analysis of machinery机械动力设计 dynamic design of machinery机械动力学 dynamics of machinery机械利益 mechanical advantage机械平衡 balance of machinery机械设计machine design; mechanical design机械手 manipulator机械特性 mechanical behavior机械无级变速mechanical stepless speed changes机械系统 mechanical system机械系统设计mechanical system design, MSD机械效率 mechanical efficiency机械原理theory of machines and mechanisms机械运转不均匀系数coefficient of speed fluctuation积分 integrate极位夹角crank angle between extreme (or limiting) positions极限位置extreme (or limiting) position棘轮 ratchet棘轮机构 ratchet mechanism棘爪 pawl急回机构 quick-return mechanism急回特性 quick-return characteristics急回系数advance-to return-time ratio急回运动 quick-return motion技术过程 technique process技术经济评价technical and economic evaluation技术系统 technique system计算机辅助设计computer aided design, CAD计算机辅助制造computer aided manufacturing, CAM计算机集成制造系统computer integrated manufacturing system, CIMS 计算力矩factored moment; calculation moment计算弯矩 calculated bending moment加权系数 weighting efficient加速度 acceleration加速度分析 acceleration analysis加速度曲线 acceleration diagram尖底从动件 knife-edge follower尖点 pointing; cusp间隙 backlash间歇运动机构 intermittent motion mechanism 简谐运动simple harmonic motion减摩性 anti-friction quality减速比 reduction ratio减速齿轮、减速装置 reduction gear减速器 speed reducer键 key键槽 keyway渐开螺旋面 involute helicoid渐开线 involute渐开线齿廓 involute profile渐开线齿轮 involute gear渐开线发生线generating line of involute渐开线方程 involute equation渐开线函数 involute function渐开线花键 involute spline渐开线蜗杆 involute worm渐开线压力角pressure angle of involute胶合 scoring交变应力 repeated stress交变载荷repeated fluctuating load交叉带传动 cross-belt drive交错轴斜齿轮crossed helical gears铰链、枢纽 hinge角加速度 angular acceleration角接触球轴承angular contact ball bearing角接触推力轴承angular contact thrust bearing 角接触向心轴承angular contact radial bearing 角接触轴承 angular contact bearing角速比 angular velocity ratio角速度 angular velocity接触式密封 contact seal接触应力 contact stress阶梯轴 multi-diameter shaft截面 section节点 pitch point节距circular pitch; pitch of teeth节线 pitch line节圆 pitch circle节圆齿厚thickness on pitch circle节圆直径 pitch diameter节圆锥 pitch cone节圆锥角pitch cone angle结构 structure结构设计 structural design解析设计 analytical design紧边 tight-side紧固件 fastener静力 static force静密封 static seal静平衡 static balance静载荷 static load径节 diametral pitch径向 radial direction径向当量动载荷dynamic equivalent radial load径向当量静载荷static equivalent radial load径向基本额定动载荷basic dynamic radial load rating 径向基本额定静载荷basic static radial load tating径向间隙 clearance径向接触轴承radial contact bearing径向平面 radial plane径向游隙 radial internal clearance径向载荷 radial load径向载荷系数 radial load factor局部自由度passive degree of freedom矩形螺纹square threaded form矩形牙嵌式离合器 square-jaw positive-contact clutch 矩阵 matrix锯齿形螺纹buttress thread form绝对尺寸系数 absolute dimensional factor绝对速度 absolute velocity绝对运动 absolute motion均衡装置 load balancing mechanism开口传动 open-belt drive开链机构open chain mechanism开式链open kinematic chain抗压强度 compression strength可靠度 degree of reliability可靠性 reliability可靠性设计reliability design, RD空间机构 spatial mechanism空间连杆机构 spatial linkage空间凸轮机构 spatial cam空间运动副spatial kinematic pair空间运动链spatial kinematic chain空气弹簧 air spring空转 idle宽度系列 width series框图 block diagram雷诺方程 Reynolds‘s equation离合器 clutch离心力 centrifugal force离心密封 centrifugal seal离心应力 centrifugal stress理论廓线 pitch curve理论啮合线theoretical line of action隶属度 membership力 force力多边形 force polygon力封闭型凸轮机构force-drive (or force-closed) cam mechanism 力矩 moment力偶 couple力偶矩moment of couple力平衡 equilibrium联轴器 coupling shaft coupling联组 V 带 tight-up V belt连杆connecting rod, coupler连杆机构 linkage连杆曲线 coupler-curve连心线 line of centers链 chain链传动装置 chain gearing链轮sprocket sprocket-wheel sprocket gear chain wheel两维凸轮 two-dimensional cam临界转速 critical speed六杆机构 six-bar linkage龙门刨床 double Haas planer绿色设计green design design for environment轮坯 blank轮系 gear train螺钉 screws螺杆 screw螺距 thread pitch螺母 screw nut螺栓 bolts螺纹thread (of a screw)螺纹导程 lead螺纹效率 screw efficiency螺旋传动 power screw螺旋副 helical pair螺旋机构 screw mechanism螺旋角 helix angle螺旋密封 spiral seal螺旋线 helix ,helical line螺旋锥齿轮 helical bevel gear马耳他机构Geneva wheel Geneva gear马耳他十字 Maltese cross脉动无级变速pulsating stepless speed changes脉动循环应力fluctuating circulating stress脉动载荷 fluctuating load铆钉 rivet迷宫密封 labyrinth seal密封 seal密封带 seal belt密封胶 seal gum密封元件 potted component密封装置 sealing arrangement面对面安装 face-to-face arrangement面向产品生命周期设计design for product`s life cycle, DPLC 名义应力、公称应力 nominal stress模幅箱 morphology box模糊集 fuzzy set模糊评价 fuzzy evaluation模块化设计 modular design, MD模块式传动系统 modular system模数 module磨损abrasion wear; scratching摩擦 friction摩擦角 friction angle摩擦力 friction force摩擦力矩 friction moment摩擦系数 coefficient of friction摩擦学设计 tribology design, TD摩擦圆 friction circle摩擦阻力 frictional resistance末端执行器 end-effector目标函数 objective function耐腐蚀性 corrosion resistance耐磨性 wear resistance挠性机构mechanism with flexible elements挠性转子 flexible rotor内齿轮 internal gear内齿圈 ring gear内力 internal force内圈 inner ring能量 energy能量指示图 viscosity逆时针counterclockwise (or anticlockwise)啮出 engaging-out啮合 engagement, mesh, gearing啮合点 contact points啮合角working pressure angle啮合线 line of action啮合线长度length of line of action啮入 engaging-in凝固点freezing point; solidifying point牛头刨床 shaper扭簧 helical torsion spring扭矩moment of torque扭转应力 torsion stress诺模图 Nomogram盘形凸轮 disk cam盘形转子 disk-like rotor抛物线运动 parabolic motion疲劳极限 fatigue limit疲劳强度 fatigue strength偏(心)距 offset distance偏距圆 offset circle偏心率 eccentricity ratio偏心盘 eccentric偏心质量 eccentric mass偏置滚子从动件offset roller follower偏置尖底从动件offset knife-edge follower偏置曲柄滑块机构offset slider-crank mechanism 偏置式 offset拼接 matching频率 frequency平带 flat belt平带传动 flat belt driving平底从动件 flat-face follower平底宽度 face width平分线 bisector平衡 balance平衡机 balancing machine平衡品质 balancing quality平衡平面 correcting plane平衡质量 balancing mass平衡重 counterweight平衡转速 balancing speed平均速度 average velocity平均应力 average stress平均中径mean screw diameter平面副planar pair, flat pair平面机构 planar mechanism平面连杆机构 planar linkage平面凸轮 planar cam平面凸轮机构 planar cam mechanism平面运动副planar kinematic pair平面轴斜齿轮 parallel helical gears评价与决策 evaluation and decision普通平键 parallel key其他常用机构other mechanism in common use奇异位置 singular position起动阶段 starting period起始啮合点initial contact , beginning of contact启动力矩 starting torque气动机构 pneumatic mechanism气体轴承 gas bearing千斤顶 jack嵌入键 sunk key强迫振动 forced vibration切齿深度depth of cut球 ball球面副 spheric pair球面滚子 convex roller球面渐开线 spherical involute球面运动 spherical motion球销副 sphere-pin pair球轴承 ball bearing球坐标操作器 polar coordinate manipulator曲柄 crank曲柄存在条件 Grashoff`s law曲柄导杆机构crank shaper (guide-bar) mechanism曲柄滑块机构slider-crank (or crank-slider) mechanism 曲柄摇杆机构 crank-rocker mechanism曲齿锥齿轮spiral bevel gear曲率 curvature曲率半径 radius of curvature曲面从动件 curved-shoe follower曲线拼接 curve matching曲线运动 curvilinear motion曲轴 crank shaft驱动力 driving force驱动力矩 driving moment (torque)权重集 weight sets全齿高 whole depth燃点 spontaneous ignition热平衡heat balance; thermal equilibrium人字齿轮 herringbone gear冗余自由度redundant degree of freedom柔轮 flexspline柔性冲击flexible impulse; soft shock柔性制造系统flexible manufacturing system; FMS柔性自动化 flexible automation润滑 lubrication润滑剂 lubricant润滑油膜 lubricant film润滑装置 lubrication device三角形花键 serration spline三角形螺纹V thread screw三维凸轮 three-dimensional cam三心定理 Kennedy`s theorem砂漏 hour-glass砂轮越程槽 grinding wheel groove少齿差行星传动planetary drive with small teeth difference 设计变量 design variable设计方法学 design methodology设计约束 design constraints深沟球轴承deep groove ball bearing生产阻力 productive resistance升程 rise升距 lift十字滑块联轴器double slider coupling; Oldham‘s coupling 实际廓线 cam profile实际啮合线actual line of action矢量 vector输出功 output work输出构件 output link输出机构 output mechanism输出力矩 output torque输出轴 output shaft输入构件 input link数学模型 mathematic model双滑块机构 double-slider mechanism, ellipsograph双列轴承double row bearing双曲柄机构double crank mechanism双曲面齿轮 hyperboloid gear双头螺柱 studs双万向联轴节constant-velocity (or double) universal joint 双向推力轴承double-direction thrust bearing双摇杆机构double rocker mechanism双转块机构 Oldham coupling瞬心 instantaneous center顺时针 clockwise死点 dead point四杆机构 four-bar linkage松边 slack-side速度 velocity速度波动 speed fluctuation速度不均匀 ( 波动 ) 系数coefficient of speed fluctuation 速度曲线 velocity diagram速度瞬心instantaneous center of velocity塔轮 step pulley踏板 pedal台钳、虎钳 vice太阳轮 sun gear套筒 sleeve特殊运动链special kinematic chain特性 characteristics梯形螺纹acme thread form替代机构 equivalent mechanism铁磁流体密封 ferrofluid seal停车阶段 stopping phase停歇 dwell同步带 synchronous belt同步带传动synchronous belt drive凸的，凸面体 convex凸轮 cam凸轮倒置机构 inverse cam mechanism凸轮机构cam , cam mechanism凸轮廓线 cam profile凸轮廓线绘制layout of cam profile凸轮理论廓线 pitch curve凸缘联轴器 flange coupling图册、图谱 atlas图解法 graphical method推程 rise推力球轴承 thrust ball bearing推力轴承 thrust bearing退刀槽tool withdrawal groove退火 anneal陀螺仪 gyroscope外齿轮 external gear外力 external force外圈 outer ring外形尺寸 boundary dimension弯矩 bending moment弯曲应力 beading stress万向联轴器Hooks coupling universal coupling腕部 wrist网上设计on-net design, OND往复式密封 reciprocating seal往复移动 reciprocating motion微动螺旋机构 differential screw mechanism位移 displacement位移曲线 displacement diagram位姿pose , position and orientation稳定运转阶段 steady motion period稳健设计 robust design蜗杆 worm蜗杆传动机构 worm gearing蜗杆头数number of threads蜗杆蜗轮机构worm and worm gear蜗杆形凸轮步进机构worm cam interval mechanism 蜗杆旋向hands of worm蜗杆直径系数 diametral quotient蜗轮 worm gear涡圈形盘簧 power spring无级变速装置stepless speed changes devices无穷大 infinite系杆crank arm, planet carrier细牙螺纹 fine threads现场平衡 field balancing相对间隙 relative gap相对速度 relative velocity相对运动 relative motion橡胶弹簧 balata spring橡皮泥 plasticine向心力 centrifugal force向心轴承 radial bearing销 pin消耗 consumption小齿轮 pinion小径 minor diameter校正平面 correcting plane斜齿轮的当量直齿轮equivalent spur gear of the helical gear斜齿圆柱齿轮 helical gear斜键、钩头楔键 taper key谐波齿轮 harmonic gear谐波传动 harmonic driving谐波发生器 harmonic generator泄漏 leakage心轴 spindle形封闭凸轮机构positive-drive (or form-closed) cam mechanism行程速比系数advance-to return-time ratio行程速度变化系数coefficient of travel speed variation行星齿轮装置 planetary transmission行星轮 planet gear行星轮变速装置planetary speed changing devices行星轮系planetary gear train修正梯形加速度运动规律modified trapezoidal acceleration motion 修正正弦加速度运动规律modified sine acceleration motion虚拟现实 virtual reality虚拟现实技术 virtual reality technology, VRT虚拟现实设计 virtual reality design, VRD虚约束redundant (or passive) constraint许用不平衡量allowable amount of unbalance许用压力角 allowable pressure angle许用应力allowable stress; permissible stress悬臂结构 cantilever structure悬臂梁 cantilever beam旋转力矩 running torque旋转式密封 rotating seal旋转运动 rotary motion选型 type selection循环功率流circulating power load压力 pressure压力角 pressure angle压力中心 center of pressure压缩机 compressor压应力 compressive stress牙嵌式联轴器jaw (teeth) positive-contact coupling雅可比矩阵 Jacobi matrix液力传动 hydrodynamic drive液力耦合器 hydraulic couplers液体弹簧 liquid spring液压机构 hydraulic mechanism液压无级变速hydraulic stepless speed changes一般化运动链 generalized kinematic chain移动从动件 reciprocating follower移动副prismatic pair, sliding pair移动关节 prismatic joint移动凸轮 wedge cam应力—应变图 stress-strain diagram应力幅 stress amplitude应力集中 stress concentration应力集中系数factor of stress concentration应力图 stress diagram盈亏功increment or decrement work优化设计 optimal design油杯 oil bottle油沟密封oily ditch seal油壶 oil can有害阻力 detrimental resistance有害阻力 useless resistance有效拉力 effective tension有效圆周力 effective circle force有益阻力 useful resistance余弦加速度运动cosine acceleration (or simple harmonic) motion 预紧力 preload原动机 prime mover原动机 primer mover原动件 driving link原始机构 original mechanism圆带 round belt圆带传动 round belt drive圆弧齿厚 circular thickness圆弧圆柱蜗杆hollow flank worm圆角半径 fillet radius圆盘摩擦离合器disc friction clutch圆盘制动器 disc brake圆形齿轮 circular gear圆柱副 cylindric pair圆柱滚子 cylindrical roller圆柱滚子轴承 cylindrical roller bearing圆柱螺旋拉伸弹簧cylindroid helical-coil extension spring圆柱螺旋扭转弹簧cylindroid helical-coil torsion spring圆柱螺旋压缩弹簧cylindroid helical-coil compression spring 圆柱式凸轮步进运动机构 barrel (cylindric) cam圆柱凸轮 cylindrical cam圆柱蜗杆 cylindrical worm圆柱坐标操作器cylindrical coordinate manipulator圆锥齿轮机构 bevel gears圆锥滚子 tapered roller圆锥滚子轴承 tapered roller bearing圆锥角 cone angle圆锥螺旋扭转弹簧conoid helical-coil compression spring约束 constraint约束反力 constraining force约束条件 constraint condition跃度 jerk跃度曲线 jerk diagram运动倒置 kinematic inversion运动方案设计kinematic precept design运动分析 kinematic analysis运动副 kinematic pair运动构件 moving link运动简图 kinematic sketch运动链 kinematic chain运动设计 kinematic design运动失真 undercutting运动粘度 kenematic viscosity运动周期 cycle of motion运动综合 kinematic synthesis运转不均匀系数coefficient of velocity fluctuation载荷 load载荷—变形曲线 load—deformation curve载荷—变形图 load—deformation diagram窄V带 narrow V belt毡圈密封felt ring seal展成法 generating张紧力 tension张紧轮 tension pulley振动 vibration振动力矩 shaking couple振动频率frequency of vibration振幅 amplitude of vibration正切机构 tangent mechanism正弦机构sine generator, scotch yoke正向运动学direct (forward) kinematics正应力、法向应力 normal stress织布机 loom直齿圆柱齿轮 spur gear直齿锥齿轮straight bevel gear直角三角形 right triangle直角坐标操作器 Cartesian coordinate manipulator 直径系列 diameter series直径系数 diametral quotient直廓环面蜗杆 hindley worm直线运动 linear motion直轴 straight shaft执行构件executive link; working link制动器 brake智能化设计intelligent design, ID质径积 mass-radius product质量 mass质心 center of mass中间平面 mid-plane中径 mean diameter中心距 center distance中心距变动center distance change中心轮 central gear终止啮合点final contact, end of contact重合点 coincident points重合度 contact ratio周节 pitch周期性速度波动periodic speed fluctuation周转轮系epicyclic gear train轴 shaft轴承盖 bearing cup轴承高度 bearing height轴承合金 bearing alloy轴承宽度 bearing width轴承内径bearing bore diameter轴承寿命 bearing life轴承套圈 bearing ring轴承外径 bearing outside diameter轴承座 bearing block轴端挡圈shaft end ring轴环 shaft collar轴肩 shaft shoulder轴角 shaft angle轴颈 journal轴瓦、轴承衬 bearing bush轴向 axial direction轴向齿廓axial tooth profile轴向当量动载荷dynamic equivalent axial load轴向当量静载荷static equivalent axial load轴向分力axial thrust load轴向基本额定动载荷basic dynamic axial load rating轴向基本额定静载荷basic static axial load rating轴向接触轴承axial contact bearing轴向平面 axial plane轴向游隙axial internal clearance轴向载荷 axial load轴向载荷系数axial load factor肘形机构 toggle mechanism主动齿轮 driving gear主动带轮 driving pulley主动件 driving link转动导杆机构 whitworth mechanism转动副 revolute (turning) pair转动关节 revolute joint转速swiveling speed rotating speed转轴 revolving shaft转子 rotor转子平衡 balance of rotor装配条件 assembly condition锥齿轮 bevel gear锥齿轮的当量直齿轮equivalent spur gear of the bevel gear 锥顶common apex of cone锥距 cone distance锥轮bevel pulley; bevel wheel锥面包络圆柱蜗杆milled helicoids worm准双曲面齿轮 hypoid gear子程序 subroutine子机构 sub-mechanism自动化 automation自锁 self-locking自锁条件condition of self-locking自由度 degree of freedom, mobility总反力 resultant force总效率combined efficiency; overall efficiency总重合度total contact ratio纵向重合度overlap contact ratio纵坐标 ordinate阻抗力 resistance组成原理theory of constitution组合安装 stack mounting组合齿形 composite tooth form组合机构 combined mechanism最大盈亏功maximum difference work between plus and minus work 最少齿数 minimum teeth number最小向径 minimum radius作用力 applied force坐标系 coordinate frameII 级杆组 dyadO 形密封圈密封O ring sealV 带 V belt（疲劳）点蚀 pitting。
机械设计 外文翻译 外文文献 英文文献及译文 齿轮和轴的介绍
译文一：译文齿轮和轴的介绍摘要:在传统机械和现代机械中齿轮和轴的重要地位是不可动摇的。
齿轮和轴主要安装在主轴箱来传递力的方向。
通过加工制造它们可以分为许多的型号，分别用于许多的场合。
所以我们对齿轮和轴的了解和认识必须是多层次多方位的。
关键词:齿轮；轴在直齿圆柱齿轮的受力分析中，是假定各力作用在单一平面的。
我们将研究作用力具有三维坐标的齿轮。
因此，在斜齿轮的情况下，其齿向是不平行于回转轴线的。
而在锥齿轮的情况中各回转轴线互相不平行。
像我们要讨论的那样，尚有其他道理需要学习，掌握。
斜齿轮用于传递平行轴之间的运动。
倾斜角度每个齿轮都一样，但一个必须右旋斜齿，而另一个必须是左旋斜齿。
齿的形状是一溅开线螺旋面。
如果一张被剪成平行四边形（矩形）的纸张包围在齿轮圆柱体上，纸上印出齿的角刃边就变成斜线。
如果我展开这张纸，在血角刃边上的每一个点就发生一渐开线曲线。
直齿圆柱齿轮轮齿的初始接触处是跨过整个齿面而伸展开来的线。
斜齿轮轮齿的初始接触是一点，当齿进入更多的啮合时，它就变成线。
在直齿圆柱齿轮中，接触是平行于回转轴线的。
在斜齿轮中，该先是跨过齿面的对角线。
它是齿轮逐渐进行啮合并平稳的从一个齿到另一个齿传递运动，那样就使斜齿轮具有高速重载下平稳传递运动的能力。
斜齿轮使轴的轴承承受径向和轴向力。
当轴向推力变的大了或由于别的原因而产生某些影响时，那就可以使用人字齿轮。
双斜齿轮（人字齿轮）是与反向的并排地装在同一轴上的两个斜齿轮等效。
他们产生相反的轴向推力作用，这样就消除了轴向推力。
当两个或更多个单向齿斜齿轮被在同一轴上时，齿轮的齿向应作选择，以便产生最小的轴向推力。
交错轴斜齿轮或螺旋齿轮，他们是轴中心线既不相交也不平行。
交错轴斜齿轮的齿彼此之间发生点接触，它随着齿轮的磨合而变成线接触。
因此他们只能传递小的载荷和主要用于仪器设备中，而且肯定不能推荐在动力传动中使用。
交错轴斜齿轮与斜齿轮之间在被安装后互相捏合之前是没有任何区别的。
机械毕业设计英文外文翻译97带式运输机
附录二：外文技术资料及中文翻译1、英文技术资料Belt ConveyorFIELD OF THE INVENTIONThe present invention relates to a belt conveyor having a circulating conveying belt, having carrying rollers, which are arranged between the top strand and the bottom strand of the conveying belt, and having a drive device and a force-transmission device for moving the conveying belt.BACKGROUND OF THE INVENTIONIt is known from practice for force to be transmitted from the drive device to the conveying belt of a belt conveyor via friction fitting. The friction between a driven carrying roller and the conveying belt, for example, may even be sufficient for this purpose. The rest of the carrying rollers are mounted in a movable manner and rotate along.DE 42 44 170 C2 discloses a belt conveyor having an endless conveying belt, the latter being driven by means of a force-transmission device which is present in the form of a friction wheel. A drive shaft extends beneath the bottom strand of the conveying belt. On the inner radius of the belt curve, a motor is connected as a drive device to the drive shaft and, in the region of the outer radius, a friction wheel is seated on the drive shaft and is in contact with the outer surface of the conveying belt. In this case, the friction wheel interacts with a carrying roller functioning as counterpressure roller. The drive shaft is mounted such that it can be moved at an angle both in the region of the outer radius and in the region of the inner radius of the belt curve. The movable-angle mounting of the drive shaft allows adaptation of the extent to which the friction wheel is pressed against the conveying belt in proportion to the actual load. In this way, the wear is reduced if, in part-load operation, the conveying belt is only subjected to the contact-pressure force which is necessary for this purpose.Although the belt conveyor known from DE 42 44 170 C2 reduces the wear of the conveying belt, it cannot rule it out altogether. The task of conveying foodstuffs or other goods which are to be kept clean involves, in addition to the mechanical damage to the conveying belt, the aspect of hygiene and of keeping goods clean. The abraded surface particles of the conveying belt could have a considerable adverse effect on the quality of the goods which are to be conveyed. Moreover, the known belt conveyor requires an extremely high level of structural outlay as far as the movable mounting of the separate drive shaft is concerned. SUMMARY OF THE INVENTIONTaking as departure point the belt conveyor known from DE 42 44 170 C2, the object of the invention is to specify a belt conveyor of the type in question which largely rules out any adverse effect to the surface of the conveying belt of the belt conveyor by the force-transmission device. According to a particularly preferred configuration, the belt conveyor is intended to require just a low level of structural outlay.The above object is achieved by the features of Patent claim 1. According to the latter, a belt conveyor of the type in question is configured such that a pair of elements which interact with one another with a form fit is provided for force-transmission purposes, and that one element is assigned to the force-transmission device and the other element is assigned to the conveying belt.According to the invention, it has been found that the surface of the conveying belt is not adversely affected as a result of the action of the force-transmission device if a separate pair of elements is providedin order to realize force transmission. It has also been found that the use of a pair of movement-converting elements which are known per se and interact with one another with a form fit largely eliminates the disadvantages which are known in the case of friction-fitting movement conversion, in particular wear and abrasion.According to a preferred exemplary embodiment of the belt conveyor according to the invention, the pair of elements could be present as toothed ring and toothed belt, the tooth flanks of the toothed ring and of the toothed belt interacting with one another. It would be possible for the toothed ring to be assigned to the force-transmission device and for the toothed belt to be assigned to the conveying belt.As far as a particularly low level of structural outlay is concerned, a preferred configuration of the abovementioned exemplary embodiment provides that the toothed ring is assigned to a carrying roller, and the latter thus simultaneously assumes the role of the force-transmission device. Via a journal projecting from the carrying roller, the drive takes place by means of a motor. The toothed ring could be plugged onto the carrying roller and fixed releasably—for example via a shaft/hub connection or a feather key—to the same. In the case of a plugged-on toothed ring, it is advantageous that it is possible to use carrying rollers which are already present. It is particularly advantageous for each carrying roller to be assigned at least one toothed ring. Over the entire running path of the conveying belt, it would then be the case that the toothed belt and the toothed rings interengage and move the conveying belt in a dimensionally stable manner. Corresponding to the toothed ring or rings which is/are arranged between the top and bottom strands and belongs/belong to the preferred configuration mentioned above, the toothed belt is arranged on the underside of the conveying belt, and extends in the running direction of the same. Arranging the toothed belt on the underside of the conveying belt once again ensures that the top side of the conveying belt, which is charged if appropriate with goods which are to be kept clean, is not subject to any force transmission, mechanical damage or production of abrasion particles or other contaminants.An expedient development of the preferred configuration of the belt conveyor according to the invention makes provision for the toothed ring to be arranged at the end of the carrying roller. As a result, on the one hand, straightforward maintenance of the force-transmission device is made possible and, on the other hand, this arrangement is also more cost-effective than a, for example, central arrangement. Direct force transmission over a short distance is achieved by a journal for the connection of the drive device projecting from that end of the carrying roller which is provided with the toothed ring.It is particularly advantageous if the toothed belt extends in the region of the side border of the conveying belt. As a result, on the one hand, straightforward production of the conveying belt with the toothed belt is made possible by the direct relationship to the border region and, on the other hand, a role is also played here by the accessibility to the pair of elements for maintenance purposes and, of course, by the coordination between the toothed belt and the arrangement of the toothed ring.In addition to toothed belts and toothed rings with normal toothing, it would also be possible to realize multisplining. This further reduces undesired sliding and thus wear, heating and noise development. In order to absorb high tensile forces, it would be possible for Kevlar filaments to be incorporated in the toothed belt, which usually consists of plastic. It would be possible for the conveying belt to be produced with the toothed belt by welding, vulcanizing or adhesive bonding.According to a particularly preferred configuration, it would be possible for the toothed belt to be a constituent part of a toothed- belt component which is of essentially U-shaped design in the transverse direction of the toothed belt. The U-shape makes it possible for the toothed- belt component simply to be plugged onto the border of the conveying belt until the border region has come into contact with the base part between the U-legs. The inner surface of the toothed- belt component may have been provided with adhesive beforehand. As a result of its shaping and of being produced in this way, the toothed- beltcomponent engages around the side-border region of the conveying belt.While the toothed belt of the conveying belt is subjected to compressive force by the toothed ring, and this largely rules out detachment of the toothed- belt component on the underside of the conveying belt, a counterpressure device could be provided in order to secure that region of the toothed- belt component which extends on the top side of the conveying belt. In design terms, the counterpressure device could be present in the form of an arm which acts on the U-leg of the toothed- belt component on the top side and thus constantly presses the same onto the top side of the conveying belt.As far as reliable guidance is concerned, it would be possible for the toothed belt or the toothed- belt component containing the toothed belt to form a bead. A bead ridge is thus produced over the length of the conveying belt. In the case of a U-shaped toothed- belt component, the bead ridge extends in each case at the free ends of the U-legs, at a distance from the border of the conveying belt, the distance depending essentially on the width of the toothed belt. As an alternative to a bead ridge, it would be possible for the toothed- belt component or for the straightforward toothed belt also to have at least one beveled free end. The guidance measure taken on the toothed belt or on the specific toothed- belt component is provided in order that a guide roller or a pair of guide rollers acts on the beveled surface or on the bead or bead ridge. The guidance measure explained above could be taken equally well in the case of belt curves and straight belt lines and of belt S-shapes bridging different heights.In the case of belt curves, the force acting on the conveying belt is directed toward the inner radius of the belt curve, with the result that the guide rollers, in an advantageous manner which is known per se, could have inclined running surfaces. Correspondingly angled retaining arms as a constituent part of retaining structures for the guide rollers could be arranged in each case in the region of a carrying roller. The guide rollers could be arranged in pairs on the top strand and on the bottom strand of the conveying belt.It should be emphasized at this point that, with the abovementioned configuration of the belt conveyor according to the invention having the bead or beveled free ends, two functions are combined in the pair of form-fitting elements. Not only the force transmission, but also the guidance of the conveying belt, takes place. The dimensional stability of the conveying belt is advantageously increased by the pair of form-fitting elements with the specific configuration of the toothed belt or of the toothed- belt component for action of the guide rollers thereon.In the case of the already cited design of the belt conveyor in the form of a belt curve, the carrying rollers are of conical design and the toothed ring is arranged at the larger-diameter end of the respective carrying roller, that is to say on the outer radius of the belt curve. The drive device is present as a motor and is assigned to the first carrying roller of the belt curve. The form-fitting interengagement of the toothed wheel and toothed belt takes place in the region of each carrying roller, the form fit, in relation to the first, motor-driven carrying roller, serving for force-transmission purposes and, in relation to the rest of the rollers, serving for guiding the conveying belt.The previously explained principle of force transmission via a pair of elements which interact with one another with a form fit could also be used in the case of a straight belt line or in the case of a height-changing belt S-shape. Here, the carrying rollers are of a cylindrical design and the force transmission takes place—as with the belt curve—at a first carrying roller, while the following carrying rollers, likewise equipped with the pair of form-fitting elements, serve for guiding the conveying belt. In contrast to the belt curve, however, it would be possible, in the case of the straight belt line or in the case of the belt S-shape, for the pair of elements to be arranged at the two free ends of the respective carrying roller and on the two border regions of the conveying belt. It would thus be possible specifically for the two border regions of the conveying belt to have a toothed belt or a toothed- belt component which interacts with the toothed rings at the two free ends of each carrying roller. Furthermore, it would also be possible, with these types of construction of the belt conveyor according to the invention, to provideguide rollers.A further advantage of the preferred embodiment of the belt conveyor according to the invention, the toothed ring and toothed belt interacting, consists in the improved capacity for controlling the belt speed in accordance with the current loading. It would be possible to provide a control device which senses a change in the speed by corresponding measuring sensors and adjusts the power of the drive device in line with the safety regulations.In comparison with the force transmission realized by friction fitting, the belt conveyor according to the invention not only has the advantage of better capacity for control, but also has the advantage that the conveying belt has a high level of dimensional stability as a result of the guidance by means of the pair of form-fitting elements and by means of the pairs of guide rollers and can be subjected to higher torques. Overall, it is possible to achieve an increased level of drive power during start-up. In the case of the belt conveyor according to the invention being designed in the form of a belt curve with an inner radius of 400 mm, the carrying rollers rotate at 230 rpm at a maximum speed of 1.5 m/sec.2、中文翻译带式运输机一、领域的发明本发明涉及一种具有循环带式输送机输送带，有托辊，这是链之间的顶部和底部的传送带链排列，有一个传动装置和一个移动传送带力传动装置。
机械工程毕业设计外文翻译
毕业设计论文外文资料原文及译文学院：机电工程学院专业：机械设计制造及其自动化班级：学号：姓名：Mechanical engineering1.The porfile of mechanical engineeringEngingeering is a branch of mechanical engineerig,it studies mechanical and power generation especially power and movement.2.The history of mechanical engineering18th century later periods,the steam engine invention has provided a main power fountainhead for the industrial revolution,enormously impelled each kind of mechznical biting.Thus,an important branch of a new Engineering – separated from the civil engineering tools and machines on the branch-developed together with Birmingham and the establishment of the Associantion of Mechanical Engineers in 1847 had been officially recognized.The mechanical engineering already mainly used in by trial and error method mechanic application technological development into professional engineer the scientific method of which in the research,the design and the realm of production used .From the most broad perspective,the demend continuously to enhance the efficiencey of mechanical engineers improve the quality ofwork,and asked him to accept the history of the high degree of education and training.Machine operation to stress not only economic but also infrastructure costs to an absolute minimun.3.The field of mechanical engineeringThe commodity machinery development in the develop country,in the high level material life very great degree is decided each kind of which can realize in the mechanical engineering.Mechanical engineers unceasingly will invent the machine next life to produce the commodity,unceasingly will develop the accuracy and the complexity more and more high machine tools produces the machine.The main clues of the mechanical development is:In order to enhance the excellent in quality and reasonable in price produce to increase the precision as well as to reduce the production cost.This three requirements promoted the complex control system development.The most successful machine manufacture is its machine and the control system close fusion,whether such control system is essentially mechanical or electronic.The modernized car engin production transmission line(conveyer belt)is a series of complex productions craft mechanizationvery good example.The people are in the process of development in order to enable further automation of the production machinery ,the use of a computer to store and handle large volumes of data,the data is a multifunctional machine tools necessary for the production of spare parts.One of the objectives is to fully automated production workshop,three rotation,but only one officer per day to operate.The development of production for mechanical machinery must have adequate power supply.Steam engine first provided the heat to generate power using practical methods in the old human,wind and hydropower,an increase of engin .New mechanical engineering industry is one of the challenges faced by the initial increase thermal effciency and power,which is as big steam turbine and the development of joint steam boilers basically achieved.20th century,turbine generators to provide impetus has been sustained and rapid growth,while thermal efficiency is steady growth,and large power plants per kW capital consumption is also declining.Finally,mechanical engineers have nuclear energy.This requires the application of nuclear energy particularly high reliability and security,which requires solving many new rge power plants and the nuclear power plant control systems have become highly complex electroonics,fluid,electricity,water and mechanical parts networks All in all areas related to the mechanical engineers.Small internal combustion engine,both to the type (petrol and diesel machines)or rotary-type(gas turbines and Mong Kerr machine),as well as their broad application in the field of transport should also due to mechanical enginerrs.Throughout the transport,both in the air and space,or in the terrestrial and marine,mechanial engineers created a variety of equipment and power devices to their increasing cooperation with electrical engineers,especially in the development of appropration control systems.Mechanical engineers in the development of military weapons technology and civil war ,needs a similar,though its purpose is to enhance rather than destroy their productivity.However.War needs a lot of resources to make the area of techonlogy,many have a far-reaching development in peacetime efficiency.Jet aircraft and nuclear reactors are well known examples.The Biological engineering,mechanical engineering biotechnology is a relatively new and different areas,it provides for the replacement of the machine or increase thebody functions as well as for medical equipment.Artficial limbs have been developed and have such a strong movement and touch response function of the human body.In the development of artificial organ transplant is rapid,complex cardiac machines and similar equipment to enable increasingly complex surgery,and injuries and ill patients life functions can be sustained.Some enviromental control mechanical engineers through the initial efforts to drainage or irrigation pumping to the land and to mine and ventilation to control the human environment.Modern refrigeration and air-conditioning plant commonaly used reverse heat engine,where the heat from the engine from cold places to more external heat.Many mechanical engineering products,as well as other leading technology development city have side effects on the environment,producing noise,water and air pollution caused,destroyed land and landscape.Improve productivity and diver too fast in the commodity,that the renewable naturalforces keep pace.For mechanical engineers and others,environmental control is rapidly developing area,which includes a possible development and production of small quantities of pollutants machine sequnce,and the development of new equipment and teachnology has been to reduce and eliminate pollution.4.The role of mechanical engineeringThere are four generic mechanical engineers in common to the above all domains function.The 1st function is the understanding and the research mechanical science foundation.It includes the power and movement of the relationship dynamics For example,in the vibration and movement of the relationship;Automatic control;Study of the various forms of heart,energy,power relations between the thermodynamic;Fluidflows; Heat transfer; Lubricant;And material properties.The 2nd function will be conducts the research,the desing and the development,this function in turn attempts to carry on the essential change to satisfy current and the future needs.This not only calls for a clear understanding of mechanical science,and have to breakdown into basic elements of a complex system capacity.But also the need for synthetic and innovative inventions.The 3rd function is produces the product and the power,include plan,operation and maintenance.Its goal lies in the maintenance eitherenhances the enterprise or the organization longer-tern and survivabilaty prestige at the same time,produces the greatest value by the least investments and the consumption.The 4th function is mechanical engineer’s coordinated function,including the management,the consultation,as well as carries on the market marking in certain situation.In all these function,one kind unceasingly to use the science for a long time the method,but is not traditional or the intuition method tendency,this is a mechanical engineering skill aspect which unceasingly grows.These new rationalization means typical names include:The operations research,the engineering economics,the logical law problem analysis(is called PABLA) However,creativity is not rationalization.As in other areas,in mechanical engineering,to take unexpected and important way to bring about a new capacity,still has a personal,marked characteristice.5.The design of mechanical engineeringThe design of mechanical is the design has the mechanical property the thing or the system,such as:the instrument and the measuring appliance in very many situations,the machine design must use the knowledge of discipline the and so on mathematics,materials science and mechanics.Mechanical engineering desgin includeing all mechanical desgin,but it was a study,because it also includes all the branches of mechsnical engineering,such as thermodynamics all hydrodynamics in the basic disciplines needed,in the mechanical engineering design of the initial stude or mechanical design.Design stages.The entire desgin process from start to finish,in the process,a demand that is designed for it and decided to do the start.After a lot of repetition,the final meet this demand by the end of the design procees and the plan.Design considerations.Sometimes in a system is to decide which parts needs intensity parts of geometric shapesand size an important factor in this context that we must consider that the intensity is an important factor in the design.When we use expression design considerations,we design parts that may affect the entire system design features.In the circumstances specified in the design,usually for a series of such functions must be taken into account.Howeever,to correct purposes,we should recognize that,in many cases thedesign of important design considerations are not calculated or test can determine the components or systems.Especially students,wheen in need to make important decisions in the design and conduct of any operation that can not be the case,they are often confused.These are not special,they occur every day,imagine,for example,a medical laboratory in the mechanical design,from marketing perspective,people have high expectations from the strength and relevance of impression.Thick,and heavy parts installed together:to produce a solid impression machines.And sometimes machinery and spare parts from the design style is the point and not the other point of view.Our purpose is to make those you do not be misled to believe that every design decision will needreasonable mathematical methods.Manufacturing refers to the raw meterials into finished products in the enterprise.Create three distinct phases.They are:input,processing exprot.The first phase includes the production of all products in line with market needs essential.First there must be the demand for the product,the necessary materials,while also needs such as energy,time,human knowledge and technology resourcess .Finall,the need for funds to obtain all the other resources. Lose one stage after the second phase of the resources of the processes to be distributed.Processing of raw materials into finished products of these processes.To complete the design,based on the design,and then develop plans.Plan implemented through various production processes.Management of resources and processes to ensure efficiency and productivity.For example,we must carefully manage resources to ensure proper use of funds.Finally,people are talking about the product market was cast.Stage is the final stage of exporting finished or stage.Once finished just purchased,it must be delivered to the users.According to product performance,installation and may have to conduct further debugging in addition,some products,especially those very complex products User training is necessary.6.The processes of materials and maunfacturingHere said engineering materials into two main categories:metals and non-ferrous,high-performance alloys and power metals.Non-metallic futher divided into plastice,synthetic rubber,composite materials and ceramics.It said the productionproccess is divided into several major process,includingshape,forging,casting/ founding,heat treatment,fixed/connections ,measurement/ quality control and materal cutting.These processes can be further divide into each other’s craft.Various stages of the development of the manufacturing industry Over the years,the manufacturing process has four distinct stages of development, despite the overlap.These stages are:The first phase is artisanal,the second Phase is mechanization.The third phase is automation the forth Phase is integrated.When mankind initial processing of raw materials into finished products will be,they use manual processes.Each with their hands and what are the tools manuslly produced.This is totally integrated production take shape.A person needs indentification,collection materials,the design of a product to meet that demand,the production of such products and use it.From beginning to end,everything is focused on doing the work of the human ter in the industrial revolution introduced mechanized production process,people began to use machines to complete the work accomplished previously manual. This led to the specialization.Specialization in turn reduce the manufacture of integrated factors.In this stage of development,manufacturing workers can see their production as a whole represent a specific piece of the part of the production process.One can not say that their work is how to cope with the entire production process,or how they were loaded onto a production of parts finished.Development of manufacting processes is the next phase of the selection process automation.This is a computer-controlled machinery and processes.At this stage,automation island began to emerge in the workshop lane.Each island represents a clear production process or a group of processes.Although these automated isolated island within the island did raise the productivity of indivdual processes,but the overall productivity are often not change.This is because the island is not caught in other automated production process middle,but not synchronous with them .The ultimate result is the efficient working fast parked through automated processes,but is part of the stagnation in wages down,causing bottlenecks.To better understand this problem,you can imagine the traffic in the peak driving a red light from the red Service Department to the next scene. Occasionally you will find a lot less cars,more than being slow-moving vehicles,but the results can be found by thenext red light Brance.In short you real effect was to accelerate the speed of a red Department obstruction offset.If you and other drivers can change your speed and red light simultaneously.Will advance faster.Then,all cars will be consistent,sommth operation,the final everyone forward faster.In the workshop where the demand for stable synchronization of streamlined production,and promoted integration of manufacturing development.This is a still evolving technology.Fully integrated in the circumstances,is a computer-controllrd machinery and processing.integrated is completed through computer.For example in the preceding paragraph simulation problems,the computer will allow all road vehicles compatible with the change in red.So that everyone can steady traffic.Scientific analysis of movement,timing and mechanics of the disciplines is that it is composed of two pater:statics and dynamics.Statics analyzed static system that is in the system,the time is not taken into account,research and analysis over time and dynamics of the system change.Dynameics from the two componets.Euler in 1775 will be the first time two different branches: Rigid body movement studies can conveniently divided into two parts:geometric and mechanics.The first part is without taking into account the reasons for the downward movement study rigid body from a designated location to another point of the movement,and must use the formula to reflect the actual,the formula would determine the rigid body every point position. Therefore,this study only on the geometry and,more specifically,on the entities from excision.Obviously,the first part of the school and was part of a mechanical separation from the principles of dynamics to study movement,which is more than the two parts together into a lot easier.Dynamics of the two parts are subsequently divided into two separate disciplines,kinematic and dynamics,a study of movement and the movement strength.Therefore,the primary issue is the design of mechanical systems understand its kinematic.Kinematic studies movement,rather than a study of its impact.In a more precise kinematic studies position,displacement,rotation, speed,velocity and acceleration of disciplines,for esample,or planets orbiting research campaing is a paradigm.In the above quotation content should be pay attention that the content of the Euler dynamics into kinematic and rigid body dynamics is based on the assumptionthat they are based on research.In this very important basis to allow for the treatment of two separate disciplines.For soft body,soft body shape and even their own soft objects in the campaign depends on the role of power in their possession.In such cases,should also study the power and movement,and therefore to a large extent the analysis of the increased complexity.Fortunately, despite the real machine parts may be involved are more or less the design of machines,usually with heavy material designed to bend down to the lowest parts.Therefore,when the kinematic analysis of the performance of machines,it is often assumed that bend is negligible,spare parts are hard,but when the load is known,in the end analysis engine,re-engineering parts to confirm this assnmption.机械工程1.机械工程简介机械工程是工程学的一个分支，它研究机械和动力的产，尤其是力和动力。
机械设计类英文文献及翻译
机械设计类英文文献及翻译Mechanical Design Literature:1. Title: "Mechanical design of an innovative wind turbine blade"Authors: A. Smith, B. JohnsonJournal: Renewable EnergySynopsis: This paper presents the mechanical design of a novel wind turbine blade. The design involves the utilization of advanced materials and structural analysis techniques to improve the efficiency and durability of the blade. The results show promising performance and potential for future applications in the wind energy industry.Translation: "一种创新风力发电机叶片的机械设计"期刊：可再生能源摘要：本文介绍了一种新型风力发电机叶片的机械设计。
该设计利用先进材料和结构分析技术，以提高叶片的效率和耐久性。
结果显示出良好的性能和未来在风能产业中的潜力。
2. Title: "Design and performance analysis of a robotic exoskeleton for rehabilitation"Authors: C. Wang, D. LiJournal: Robotics and Autonomous SystemsSynopsis: This study focuses on the mechanical design and performance analysis of a robotic exoskeleton for rehabilitation purposes. The exoskeleton is designed to assist patients with mobility impairments in their daily activities. The paper discusses the design considerations, kinematic analysis, and performance evaluation of the exoskeleton, providing insightsfor future improvements in rehabilitation robotics.Translation: "一种用于康复的机器人外骨骼的设计和性能分析"期刊：机器人与自主系统摘要：本研究针对一种用于康复目的的机器人外骨骼进行了机械设计和性能分析。
(完整版)机械类外文文献翻译
文献翻译英文原文：NOVEL METHOD OF REALIZING THE OPTIMAL TRANSMISSION OF THE CRANK-AND-ROCKER MECHANISM DESIGN Abstract: A novel method of realizing the optimal transmission of the crank-and-rocker mechanism is presented. The optimal combination design is made by finding the related optimal transmission parameters. The diagram of the optimal transmission is drawn. In the diagram, the relation among minimum transmission angle, the coefficient of travel speed variation, the oscillating angle of the rocker and the length of the bars is shown, concisely, conveniently and directly. The method possesses the main characteristic. That it is to achieve the optimal transmission parameters under the transmission angle by directly choosing in the diagram, according to the given requirements. The characteristics of the mechanical transmission can be improved to gain the optimal transmission effect by the method. Especially, the method is simple and convenient in practical use.Keywords：Crank-and-rocker mechanism, Optimal transmission angle, Coefficient of travel speed variationINTRODUCTIONBy conventional method of the crank-and-rocker design, it is very difficult to realize the optimal combination between the various parameters for optimal transmission. The figure-table design method introduced in this paper can help achieve this goal. With given conditions, we can, by only consulting the designing figures and tables, get the relations between every parameter and another of the designed crank-and-rocker mechanism. Thus the optimal transmission can be realized.The concerned designing theory and method, as well as the real cases of its application will be introduced later respectively.1ESTABLISHMENT OF DIAGRAM FOR OPTIMAL TRANSMISSION DESIGNIt is always one of the most important indexes that designers pursue to improve the efficiency and property of the transmission. The crank-and-rocker mechanism is widely used in the mechanical transmission. How to improve work ability and reduce unnecessary power losses is directly related to the coefficient of travel speed variation, the oscillating angle of the rocker and the ratio of the crank and rocker. The reasonable combination of these parameters takes an important effect on the efficiency and property of the mechanism, which mainly indicates in the evaluation of the minimum transmission angle.The aim realizing the optimal transmission of the mechanism is how to find themaximum of the minimum transmission angle. The design parameters are reasonably combined by the method of lessening constraints gradually and optimizing separately. Consequently, the complete constraint field realizing the optimal transmission is established.The following steps are taken in the usual design method. Firstly, the initial values of the length of rocker 3l and the oscillating angle of rocker ϕ are given. Then the value of the coefficient of travel speed variation K is chosen in the permitted range. Meanwhile, the coordinate of the fixed hinge of crank A possibly realized is calculated corresponding to value K .1.1 Length of bars of crank and rocker mechanismAs shown in Fig.1, left arc G C 2 is the permitted field of point A . Thecoordinates of point A are chosen by small step from point 2C to point G .The coordinates of point A are 02h y y c A -= (1)22A A y R x -= (2)where 0h , the step, is increased by small increment within range(0,H ). If the smaller the chosen step is, the higher the computational precision will be. R is the radius of the design circle. d is the distance from 2C to G .2cos )2cos(22cos 33ϕθϕϕ⎥⎦⎤⎢⎣⎡--+=l R l d (3) Calculating the length of arc 1AC and 2AC , the length of the bars of themechanism corresponding to point A is obtained [1,2].1.2 Minimum transmission angle min γMinimum transmission angle min γ(see Fig.2) is determined by the equations [3]322142322min 2)(cos l l l l l l --+=γ (4) 322142322max 2)(cos l l l l l l +-+=γ (5) max min180γγ-︒=' (6) where 1l ——Length of crank(mm)2l ——Length of connecting bar(mm)3l ——Length of rocker(mm)4l ——Length of machine frame(mm)Firstly, we choose minimum comparing min γ with minγ'. And then we record all values of min γ greater than or equal to ︒40 and choose the maximum of them.Secondly, we find the maximum of min γ corresponding to any oscillating angle ϕ which is chosen by small step in the permitted range (maximum of min γ is different oscillating angle ϕ and the coefficient of travel speed variation K ).Finally, we change the length of rockerl by small step similarly. Thus we3γcorresponding to the different length of bars, may obtain the maximum ofmindifferent oscillating angle ϕand the coefficient of travel speed variation K.Fig.3 is accomplished from Table for the purpose of diagram design.It is worth pointing out that whatever the length of rocker 3l is evaluated, the location that the maximum of min γ arises is only related to the ratio of the length of rocker and the length of machine frame 3l /4l , while independent of 3l .2 DESIGN METHOD2.1 Realizing the optimal transmission design given the coefficient of travelspeed variation and the maximum oscillating angle of the rockerThe design procedure is as follows.(1) According to given K and ϕ, taken account to the formula the extreme included angle θ is found. The corresponding ratio of the length of bars 3l /4l is obtained consulting Fig.3.︒⨯+-=18011K K θ (7) (2) Choose the length of rocker 3l according to the work requirement, the length of the machine frame is obtained from the ratio 3l /4l .(3) Choose the centre of fixed hinge D as the vertex arbitrarily, and plot an isosceles triangle, the side of which is equal to the length of rocker 3l (see Fig.4), andϕ=∠21DC C . Then plot 212C C M C ⊥, draw N C 1, and make angleθ-︒=∠9012N C C . Thus the point of intersection of M C 2 and N C 1 is gained. Finally, draw the circumcircle of triangle 21C PC ∆.(4) Plot an arc with point D as the centre of the circle, 4l as the radius. The arc intersections arc G C 2 at point A . Point A is just the centre of the fixed hinge of the crank.Therefore, from the length of the crank2/)(211AC AC l -= (8)and the length of the connecting bar112l AC l -= (9)we will obtain the crank and rocker mechanism consisted of 1l , 2l , 3l , and 4l .Thus the optimal transmission property is realized under given conditions.2.2 Realizing the optimal transmission design given the length of the rocker (or the length of the machine frame) and the coefficient of travel speed variationWe take the following steps.(1) The appropriate ratio of the bars 3l /4l can be chosen according to given K . Furthermore, we find the length of machine frame 4l (the length of rocker 3l ).(2) The corresponding oscillating angle of the rocker can be obtained consulting Fig.3. And we calculate the extreme included angle θ.Then repeat (3) and (4) in section 2.13 DESIGN EXAMPLEThe known conditions are that the coefficient of travel speed variation1818.1=K and maximum oscillating angle ︒=40ϕ. The crankandrockermechanism realizing the optimal transmission is designed by the diagram solution method presented above.First, with Eq.(7), we can calculate the extreme included angle ︒=15θ. Then, we find 93.0/43=l l consulting Fig.3 according to the values of θ and ϕ.If evaluate 503=l mm, then we will obtain 76.5393.0/504==l mm. Next, draw sketch(omitted).As result, the length of bars is 161=l mm,462=l mm,503=l mm,76.534=l mm.The minimum transmission angle is︒=--+=3698.462)(arccos 322142322min l l l l l l γ The results obtained by computer are 2227.161=l mm, 5093.442=l mm, 0000.503=l mm, 8986.534=l mm.Provided that the figure design is carried under the condition of the Auto CAD circumstances, very precise design results can be achieved.4 CONCLUSIONSA novel approach of diagram solution can realize the optimal transmission of the crank-and-rocker mechanism. The method is simple and convenient in the practical use. In conventional design of mechanism, taking 0.1 mm as the value of effective the precision of the component sizes will be enough.译文：认识曲柄摇臂机构设计的最优传动方法摘要：一种曲柄摇臂机构设计的最优传动的方法被提出。
机械设计外文翻译(中英文)
Machine design theoryThe machine design is through designs the new product or improves the old product to meet the human need the application technical science. It involves the project technology each domain, mainly studies the product the size, the shape and the detailed structure basic idea, but also must study the product the personnel which in aspect the and so on manufacture, sale and use question.Carries on each kind of machine design work to be usually called designs the personnel or machine design engineer. The machine design is a creative work. Project engineer not only must have the creativity in the work, but also must in aspect and so on mechanical drawing, kinematics, engineerig material, materials mechanics and machine manufacture technology has the deep elementary knowledge.If front sues, the machine design goal is the production can meet the human need the product. The invention, the discovery and technical knowledge itself certainly not necessarily can bring the advantage to the humanity, only has when they are applied can produce on the product the benefit. Thus, should realize to carries on before the design in a specific product, must first determine whether the people do need this kind of productMust regard as the machine design is the machine design personnel carries on using creative ability the product design, the system analysis and a formulation product manufacture technology good opportunity. Grasps the project elementary knowledge to have to memorize some data and the formula is more important than. The merely service data and the formula is insufficient to the completely decision which makes in a good design needs. On the other hand, should be earnest precisely carries on all operations. For example, even if places wrong a decimal point position, also can cause the correct design to turn wrongly.A good design personnel should dare to propose the new idea, moreover is willing to undertake the certain risk, when the new method is not suitable, use original method. Therefore, designs the personnel to have to have to have the patience, because spendsthe time and the endeavor certainly cannot guarantee brings successfully. A brand-new design, the request screen abandons obsoletely many, knows very well the method for the people. Because many person of conservativeness, does this certainly is not an easy matter. A mechanical designer should unceasingly explore the improvement existing product the method, should earnestly choose originally, the process confirmation principle of design in this process, with has not unified it after the confirmation new idea.Newly designs itself can have the question occurrence which many flaws and has not been able to expect, only has after these flaws and the question are solved, can manifest new goods come into the market the product superiority. Therefore, a performance superior product is born at the same time, also is following a higher risk. Should emphasize, if designs itself does not request to use the brand-new method, is not unnecessary merely for the goal which transform to use the new method.In the design preliminary stage, should allow to design the personnel fully to display the creativity, not each kind of restraint. Even if has had many impractical ideas, also can in the design early time, namely in front of the plan blueprint is corrected. Only then, only then does not send to stops up the innovation the mentality. Usually, must propose several sets of design proposals, then perform the comparison. Has the possibility very much in the plan which finally designated, has used certain not in plan some ideas which accepts.How does the psychologist frequently discuss causes the machine which the people adapts them to operate. Designs personnel''s basic responsibility is diligently causes the machine to adapt the people. This certainly is not an easy work, because certainly does not have to all people to say in fact all is the most superior operating area and the operating process.Another important question, project engineer must be able to carry on the exchange and the consultation with other concerned personnel. In the initial stage, designs the personnel to have to carry on the exchange and the consultation on the preliminary design with the administrative personnel, and is approved. This generally is through the oral discussion, the schematic diagram and the writing material carries on. In order to carry on the effective exchange, needs to solve the following problem:(1) designs whether this product truly does need for the people? Whether there is competitive ability(2) does this product compare with other companies'' existing similar products?(3) produces this kind of product is whether economical?(4) product service is whether convenient?(5) product whether there is sale? Whether may gain?Only has the time to be able to produce the correct answer to above question. But, the product design, the manufacture and the sale only can in carry on to the above question preliminary affirmation answer foundation in. Project engineer also should through the detail drawing and the assembly drawing, carries on the consultation together with the branch of manufacture to the finally design proposal.Usually, can have some problem in the manufacture process. Possibly can request to some components size or the common difference makes some changes, causes the components the production to change easily. But, in the project change must have to pass through designs the personnel to authorize, guaranteed cannot damage the product the function. Sometimes, when in front of product assembly or in the packing foreign shipment experiment only then discovers in the design some kind of flaw. These instances exactly showed the design is a dynamic process. Always has a better method to complete the design work, designs the personnel to be supposed unceasingly diligently, seeks these better method.Recent year, the engineerig material choice already appeared importantly. In addition, the choice process should be to the material continuously the unceasing again appraisal process. The new material unceasingly appears, but some original materials can obtain the quantity possibly can reduce. The environmental pollution, material recycling aspect and so on use, worker''s health and security frequently can attach the new limiting condition to the choice of material. In order to reduce the weight or saves the energy, possibly can request the use different material. Comes from domestic and international competition, to product service maintenance convenience request enhancement and customer''s aspect the and so on feedback pressure, can urge the people to carry on to the material reappraises. Because the material does not select when created the product responsibility lawsuit, has already had the profoundinfluence. In addition, the material and between the material processing interdependence is already known by the people clearly. Therefore, in order to can and guarantees the quality in the reasonable cost under the premise to obtain satisfaction the result, project engineer makes engineers all to have earnestly carefully to choose, the determination and the use material.Makes any product the first step of work all is designs. Designs usually may divide into several explicit stages: (a) preliminary design; (b) functional design; (c) production design. In the preliminary design stage, the designer emphatically considered the product should have function. Usually must conceive and consider several plans, then decided this kind of thought is whether feasible; If is feasible, then should makes the further improvement to or several plans. In this stage, the question which only must consider about the choice of material is: Whether has the performance to conform to the request material to be possible to supply the choice; If no, whether has a bigger assurance all permits in the cost and the time in the limit develops one kind of new material.In the functional design and the engineering design stage, needs to make a practical feasible design. Must draw up the quite complete blueprint in this stage, chooses and determines each kind of components the material. Usually must make the prototype or the working model, and carries on the experiment to it, the appraisal product function, the reliability, the outward appearance and the service maintenance and so on. Although this kind of experiment possibly can indicate, enters in the product to the production base in front of, should replace certain materials, but, absolutely cannot this point take not earnestly chooses the material the excuse. Should unify the product the function, earnestly carefully considers the product the outward appearance, the cost and the reliability. Has the achievement very much the company when manufacture all prototypes, selects the material should the material which uses with its production in be same, and uses the similar manufacture technology as far as possible. Like this has the advantage very much to the company. The function complete prototype if cannot act according to the anticipated sales volume economically to make, or is prototypical and the official production installment has in the quality and the reliable aspect is very greatly different, then this kind of prototypedoes not have the great value. Project engineer is best can completely complete the material in this stage the analysis, the choice and the determination work, but is not remains it to the production design stage does. Because, is carries on in the production design stage material replacement by other people, these people are inferior to project engineer to the product all functions understanding. In the production design stage, is should completely determine with the material related main question the material, causes them to adapt with the existing equipment, can use the existing equipment economically to carry on the processing, moreover the material quantity can quite be easy to guarantee the supply.In the manufacture process, inevitably can appear to uses the material to make some changes the situation. The experience indicated that, may use certain cheap materials to take the substitute. However, in the majority situation, in will carry on the production later to change the material to have in to start before the production to change the price which the material will spend to have to be higher than. Completes the choice of material work in the design stage, may avoid the most such situations. Started after the production manufacture to appear has been possible to supply the use the new material is replaces the material the most common reason. Certainly, these new materials possibly reduce the cost, the improvement product performance. But, must carry on the earnest appraisal to the new material, guarantees its all performance all to answer the purpose. Must remember that, the new material performance and the reliable very few pictures materials on hand such understood for the people. The majority of products expiration and the product accident caused by negligence case is because in selects the new material to take in front of substitution material, not truly understood their long-term operational performance causes.The product responsibility lawsuit forces designs the personnel and the company when the choice material, uses the best procedure. In the material process, five most common questions are: (a) did not understand or cannot use about the material application aspect most newly the best information paper; (b) has not been able to foresee and to consider the dusk year possible reasonable use (for example to have the possibility, designs the personnel also to be supposed further to forecast and the consideration because product application method not when creates consequence.ecent years many products responsibilities lawsuit case, because wrongly uses theplaintiff which the product receives the injury to accuse produces the factory, and wins the decision); (c) uses the material data not entire perhaps some data are indefinite, works as its long-term performance data is the like this time in particular;(d) the quality control method is not suitable and not after the confirmation; (e) the personnel which completely is not competent for the post by some chooses the material.Through to the above five questions analysis, may obtain these questions is does not have the sufficient reason existence the conclusion. May for avoid these questions to these questions research analyses the appearance indicating the direction. Although uses the best choice of material method not to be able to avoid having the product responsibility lawsuit, designs the personnel and the industry carries on the choice of material according to the suitable procedure, may greatly reduce the lawsuit the quantity.May see from the above discussion, the choice material people should to the material nature, the characteristic and the processing method have comprehensive and thebasic understanding.翻译：机械设计理论机械设计，通过设计新产品或改进老产品，以满足人类需要的应用技术科学。
机械设计外文文献及翻译
机械设计外文文献及翻译机械设计摘要：机器是由机械装置和其他组件组成的，用于转换或传递能量，例如发动机、涡轮机、车辆、起重机、印刷机、洗衣机、照相机和摄影机等。
许多原则和设计方法不仅适用于机器的设计，也适用于非机器的设计。
在机械工程和其他工程领域中，所有这些都需要机械设备，如开关、凸轮、阀门、船舶和搅拌机等。
关键词：设计流程、设计规则、机械设计设计流程在设计之前，应考虑机器的实际性，现有机器需要在耐用性、效率、重量、速度或成本方面得到改善。
新的机器必须具有以前机器所能执行的功能。
在设计的初始阶段，应允许设计人员充分发挥创造性，不受任何约束。
即使产生了许多不切实际的想法，也会在设计早期被改正。
只有这样，才不会阻碍创新思路。
通常还要提出几套设计方案，然后进行比较。
很可能在最终计划决定中，使用了某些不在计划之内的设想。
当外观特点和组件部分的尺寸特点分析透彻时，就可以全面设计和分析。
还要客观分析机器性能的优越性，以及其安全、重量、耐用性和成本竞争力。
每个至关重要的部分都要优化其比例和尺寸，同时也要保持与其他组成部分相协调。
还要选择原材料和处理原材料的方法。
通过力学原理来分析和实现这些重要特性，如静态反应的能量和摩擦力的最佳利用，动力惯性、加速动力和能量；包括弹性材料的强度、应力和刚度等材料的物理特性，以及流体润滑和驱动器的流体力学。
设计过程是重复和合作的过程，无论是正式还是非正式的，对设计者来说每个阶段都很重要。
最后，以图样为设计标准，并建立将来的模型。
如果测试符合要求，则对初步设计进行修改，以降低制造成本。
产品的设计需要不断探索和发展。
许多方案必须被研究、试验、完善，然后决定使用还是放弃。
虽然每个工程学问题的内容是独特的，但设计师可以按照类似的步骤来解决问题。
本文介绍了机械设计的复杂性和创造性，以及机械设计师所需要的基础知识。
在设计过程中，选择材料和进行精确计算都是必要的。
计算机辅助设计和制造技术已经成为现代机械设计的重要工具。
机械设计制造及其自动化毕业论文中英文资料外文翻译
机械设计创造及其自动化毕业论文外文文献翻译INTEGRATION OF MACHINERY译文题目专业机械设计创造及其自动化外文资料翻译INTEGRATION OF MACHINERY（From ELECTRICAL AND MACHINERY INDUSTRY）ABSTRACTMachinery was the modern science and technology development inevitable result, this article has summarized the integration of machinery technology basic outline and the development background .Summarized the domestic and foreign integration of machinery technology present situation, has analyzed the integration of machinery technology trend of development.Key word： integration of machinery ，technology， present situation ，product t，echnique of manufacture ，trend of development0. Introduction modern science and technology unceasing development, impelled different discipline intersecting enormously with the seepage, has caused the project domain technological revolution and the transformation .In mechanical engineering domain, because the microelectronic technology and the computer technology rapid development and forms to the mechanical industry seepage the integration of machinery, caused the mechanical industry the technical structure, the product organization, the function and the constitution, the production method and the management systemof by machinery for the characteristic integration ofdevelopment phase.1. Integration of machinery outline integration of machinery is refers in the organization new owner function, the power function, in the information processing function and the control function introduces the electronic technology, unifies the system the mechanism and the computerization design and the software which constitutes always to call. The integration of machinery development also has become one to have until now own system new discipline, not only develops along with the science and technology, but also entrusts with the new content .But its basic characteristic may summarize is: The integration of machinery is embarks from the system viewpoint, synthesis community technologies and so on utilization mechanical technology, microelectronic technology, automatic control technology, computer technology, information technology, sensing observation and control technology, electric power electronic technology, connection technology, information conversion technology as well as software programming technology, according to the system function goal and the optimized organization goal, reasonable disposition and the layout various functions unit, in multi-purpose, high grade, redundant reliable, in the low energy consumption significance realize the specific function value, and causes the overall system optimization the systems engineering technology .From this produces functional system, then becomes an integration of machinery systematic or the integration of machinery product. Therefore, of coveringtechnology is based on the above community technology organic fusion one kind of comprehensive technology, but is not mechanical technical, the microelectronic technology as well as other new technical simple combination, pieces together .This is the integration of machinery and the machinery adds the machinery electrification which the electricity forms in the concept basic difference .The mechanical engineering technology has the merely technical to develop the machinery electrification, still was the traditional machinery, its main function still was replaces with the enlargement physical strength .But after develops the integration of machinery, micro electron installment besides may substitute for certain mechanical parts the original function, but also can entrust with many new functions,like the automatic detection, the automatic reduction information, demonstrate the record, the automatic control and the control automatic diagnosis and the protection automatically and so on .Not only namely the integration of machinery product is human's hand and body extending, human's sense organ and the brains look, has the intellectualized characteristic is the integration of machinery and the machinery electrification distinguishes in the function essence.2. Integration of machinery development condition integration of machinery development may divide into 3 stages roughly.20th century 60's before for the first stage, this stage is called the initial stage .In this time, the people determination not on own initiative uses the electronic technology the preliminary achievement to consummate the mechanical product the performance .Specially in Second World War period, the war has stimulated the mechanical product and the electronic technology union, these mechanical and electrical union military technology, postwar transfers civilly, to postwar economical restoration positive function .Developed and the development at that time generally speaking also is at the spontaneouscondition .Because at that time the electronic technology development not yet achieved certain level, mechanical technical and electronic technology union also not impossible widespread and thorough development, already developed the product was also unable to promote massively. The 20th century 70~80 ages for the second stage, may be called the vigorous development stage .This time, the computer technology, the control technology, the communication development, has laid the technology base for the integration of machinery development . Large-scale, ultra large scale integrated circuit and microcomputer swift and violent development, has provided the full material base for the integration of machinery development .This time characteristic is :①A mechatronics word first generally is accepted in Japan, probably obtains the quite widespread acknowledgment to 1980s last stages in the worldwide scale ;②The integration of machinery technology and the product obtained the enormous development ;③The various countries start to the integration of machinery technology and the product give the very big attention and the support. 1990s later periods, started the integration of machinery technology the new stagewhich makes great strides forward to the intellectualized direction, the integration of machinery enters the thorough development time .At the same time, optics, the communication and so on entered the integration of machinery, processes the technology also zhan to appear tiny in the integration of machinery the foot, appeared the light integration of machinery and the micro integration of machinery and so on the new branch; On the other hand to the integration of machinery system modeling design, the analysis and the integrated method, the integration of machinery discipline system and the trend of development has all conducted the thorough research .At the same time, because the hugeprogress which domains and so on artificial intelligence technology, neural network technology and optical fiber technology obtain, opened the development vast world for the integration of machinery technology .These research, will urge the integration of machinery further to establish the integrity the foundation and forms the integrity gradually the scientific system. Our country is only then starts from the beginning of 1980s in this aspect to study with the application .The State Councilsummary had considered fully on international the influence which and possibly brought from this about the integration of machinery technology developmenttrend .Many universities, colleges and institutes, the development facility and some large and middle scale enterprises have done the massive work to this technical development and the application, does not yield certain result, but and so on the advanced countries compared with Japan still has the suitable disparity.3. Integration of machinery trend of development integrations of machinery are the collection machinery, the electron, optics, the control, the computer, the information and so on the multi-disciplinary overlapping syntheses, its development and the progress rely on and promote the correlation technology development and the progress .Therefore, the integration of machinery main development direction is as follows:3.1 Intellectualized intellectualizations are 21st century integration of machinery technological development important development directions .Theartificial intelligence obtains day by day in the integration of machinery constructor's research takes, the robot and the numerical control engine bedis to the machine behavior description, is in the control theory foundation, the absorption artificial intelligence, the operations research, the computer science, the fuzzy mathematics, the psychology, the physiology and the chaos dynamics and so on the new thought, the new method, simulate the human intelligence, enable it to have abilities and so on judgment inference, logical thinking, independent decision-making, obtains the higher control goal in order to .Indeed, enable the integration of machinery product to have with the human identical intelligence, is not impossible, also is nonessential .But, the high performance, the high speed microprocessor enable the integration of machinery product to have preliminary intelligent or human's partial intelligences, then is completely possible and essential.In the modern manufacture process, the information has become the control manufacture industry the determining factor, moreover is the most active actuation factor .Enhances the manufacture system information-handling capacity to become the modern manufacture science development a key point .As a result of the manufacture system information organization and structure multi-level, makes the information the gain, the integration and the fusion presents draws up the character, information measure multi-dimensional, as well as information organization's multi-level .In the manufacture information structural model, manufacture information uniform restraint, dissemination processing and magnanimous data aspects and so on manufacture knowledge library management, all also wait for further break through.Each kind of artificial intelligence tool and the computation intelligence method promoted the manufacture intelligence development in the manufacture widespread application .A kind based on the biological evolution algorithm computation intelligent agent, in includes thescheduling problem in the combination optimization solution area of technology, receives the more and more universal attention, hopefully completes the combination optimization question when the manufacture the solution speed and the solution precision aspect breaks through the question scale in pairs the restriction .The manufacture intelligence also displays in: The intelligent dispatch, the intelligent design, the intelligent processing, the robot study, the intelligent control, the intelligent craft plan, the intelligent diagnosis and so on are various These question key breakthrough, may form the product innovation the basic research system. Between 2 modern mechanical engineering front science different science overlapping fusion will have the new science accumulation, the economical development and society's progress has had the new request and the expectation to the science and technology, thus will form the front science .The front science also has solved and between the solution scientific question border area .The front science has the obvious time domain, the domain and the dynamic characteristic .The project front science distinguished in the general basic science important characteristic is it has covered the key science and technology question which the project actual appeared.Manufacture system is a complex large-scale system, for satisfies the manufacture system agility, the fast response and fast reorganization ability, must profit from the information science, the life sciences and the social sciences and so on the multi-disciplinary research results, the exploration manufacture system new architecture, the manufacture pattern and the manufacture system effective operational mechanism .Makes the system optimization the organizational structure and the good movement condition is makes the system modeling , the simulation and the optimized essential target .Not only the manufacture system new architecture to makes the enterprise the agility and may reorganize ability to the demand response ability to have the vital significance, moreover to made the enterprise first floor production equipment the flexibility and may dynamic reorganization ability set a higher request .The biological manufacture view more and more many is introduced the manufacture system, satisfies the manufacture system new request.The study organizes and circulates method and technique of complicated system from the biological phenomenon, is a valid exit which will solve many hard nut to cracks that manufacturing industry face from now on currently .Imitating to living what manufacturing point is mimicry living creature organ of from the organization, from match more, from growth with from evolution etc. function structure and circulate mode of a kind of manufacturing system and manufacturing process.The manufacturing drives in the mechanism under, continuously by one's own perfect raise on organizing structure and circulating mode and thus to adapt the process of[with] ability for the environment .For from descend but the last product proceed together a design and make a craft rules the auto of the distance born, produce system of dynamic state reorganization and product and manufacturing the system tend automatically excellent provided theories foundation and carry out acondition .Imitate to living a manufacturing to belong to manufacturing science and life science of"the far good luck is miscellaneous to hand over", it will produce to the manufacturing industry for 21 centuries huge of influence .机电一体化摘要机电一体化是现代科学技术发展的必然结果,本文简述了机电一体化技术的基本概要和发展背景。
外文翻译--机械设计简介
外文原文Introduction to Mechanical DesignMechanical design is the application of science and technology to devise new or improved products for the purpose of satisfying human needs. It is a vast field of engineering technology which not only concerns itself with the original conception of the product in terms of its size, shape and construction details, but also considers the various factors involved in the manufacture, marketing and use of the product.People who perform the various functions of mechanical design are typically called designers, or design engineers. Mechanical design is basically a creative activity. However, in addition to being innovative, a design engineer must also have a solid background in the areas of mechanical drawing, kinematics, dynamics, materials engineering, strength of materials and manufacturing processes.As stated previously, the purpose of mechanical design is to produce a product which will serve a need for man. Inventions, discoveries and scientific knowledge by themselves do not necessarily benefit people; only if they are incorporated into a designed product will a benefit be derived. It should be recognized, therefore, that a human need must be identified before a particular product is designed.Mechanical design should be considered to be an opportunity to use innovative talents to envision a design of a product, to analyze the system and then make sound judgments on how the product is to be manufactured. It is important to understand the fundamentals of engineering rather than memorize mere facts and equations. There are no facts or equations which alone can be used to provide all the correct decisions required to produce a good design. On the other hand, any calculation made must be done with the utmost care and precision. For example, if a decimal point is misplaced, a otherwise acceptable design may mot function.Good designs require trying mew ideas and being willing to take a certain amount of risk, knowing that if the mew idea does not work the existing method can bereinstated. Thus a designer must have patience, since there is no assurance of success for the time and effort expended. Creating a completely new design generally requires that many old and well-established methods be thrust aside. This is not easy since many people cling to familiar ideas, techniques and attitudes. A design engineer should constantly search for ways to improve an existing product and must decide what old, proven concepts should be used and what new, untried ideas should be incorporated.New designs generally have “bugs” or unforeseen which must be worked out before the superior characteristics of the new designs can be enjoyed. Thus there is a chance for a superior product, but only at higher risk. It should be emphasized that, if a design does not warrant radical new methods, such methods should not be applied merely for the sake of change.During the beginning stages of design, creativity should be allowed to flourish without a great number of constraints. Even though many impractical ideas may arise, it is usually easy to eliminate then in the early stages of design before firm details are required by manufacturing. In this way, Innovative ideas are not inhibited. Quite often, more than one design is developed, up to the point where they can be compared against each other. It is entirely possible that the design which is ultimately accepted will use ideas existing in one of the rejected designs that did not show as much overall promise.Psychologists frequently talk about trying to fit people to the machines they operate. It is essentially the responsibility of the engineer to strive to fit machines to people. This is not an easy task, since there is really no average person for which certain operating dimensions and procedures are optimum.Another important point which should be recognized is that a design engineer must be able to communicate ideas to other people if they ate to be incorporated. Communicating the design to others is the final, vital step in the design process. Undoubtedly many great designs, inventions, and creative works have been lost to mankind simply because the originators were unable or unable or unwilling to explain their accomplishments to others. Presentation is a selling job. The engineer whenpresenting a new solution to administrative, management, or supervisory persons, is attempting to sell or to prove to them that this solution is a better one. Unless this can be done successfully, the time and effort spent on obtaining the solution have been largely wasted.Basically, there ate only three means of communication available to us. These are the written, the oral, and the graphical forms. Therefore the successful engineer will be technically competent and versatile in all three forms of communication. A technically competent person who lacks ability in any one of these forms is severely handicapped. If ability in all three forms is lacking, no one will ever know how competent that person is!The competent engineer should not be afraid of the possibility of not succeeding in a presentation. In fact, occasional failure should be expected because failure or criticism seems to accompany every really creative idea. There is a great deal to learn from a failure, and the greatest gains ate obtained by those wiling to risk defeat. In the final analysis, the real failure would lie in decoding not to make the presentation at all. To communicate effectively, the following questions must be answered:1、Does the design really serve a human need?2、Will it be competitive with existing products of rival companies?3、It is economical to profit?4、Can it be readily maintained?5、Will it sell and make a profit?Only time will provide the true answers to the preceding questions, but the product should be designed, manufactured and marketed only with initial affirmative answers. The design engineer also must communicate the finalized design to manufacturing through the use of detail and assembly drawings.Quite often, a problem will occur during the manufacturing cycle. It may be that a exchange is required in the dimensioning or tolerancing of a part so that it can be more readily produced. This falls in the category of engineering changes which must be approved by the design engineer so that the product function will not be adversely affected. In other cases, a deficiency in the design may appear during assembly ortesting just prior to shipping.Engineering design is a systematic process by which solutions to the needs of humankind are obtained. The process is applied to problems (needs) of varying complexity. For example, mechanical engineers will use the design process to find an effective, efficient method to convert reciprocating motion to circular motion for the drive train in an internal combustion engine; electrical engineers will use the process to design electrical generating systems using falling water as the power source; and materials engineers use the process to design ablative materials which enable astronauts to safely the earth’s atmosphere.The va st majority of complex problems in today’s high technology society depend for solution not on a single engineering discipline, but on teams of engineers, scientists, environmentalists, economists, sociologists, and legal personnel. Solutions are not only dependent upon the appropriate applications of technology but also upon public sentiment, government regulations and political influence. As engineers we are empowered with the technical expertise to develop new and improved products and systems, but at the same time we must be increasingly aware of the impact of our actions on society and the environment in general and work conscientiously toward the best solution in view of all relevant factors.Design is the culmination of the engineering educational process; it is the salient feature that distinguishes engineering from other professions.A formal definition of engineering design is found in the curriculum guidelines of the Accreditation Board for Engineering and Technology (AENT). ABEN accredits curricula in engineering schools and derives its membership from the various engineering professional societies. Each accredited curriculum has a well-deigned design component which falls within the ABEN guideline. The ABEN statement on design reads as follows:Engineering design is the process of devising a system, component, or process to meet desired needs. It is a decision making process (often iterative ), in which the basic sciences, mathematic, and engineering sciences are applied to convert resources optimally to meet a stated objective. Among the fundamental elements of the designprocess are the establishment of objectives and criteria, synthesis, analysis, construction, testing, and evaluation. The engineering design component of a curriculum must include most of the following features: development of student creativity, use of open-ended problems, development and use of modern design theory mad methodology, formulation of design problem statements and specifications, consideration of alternative solutions, feasibility considerations, production processes, concurrent engineering design, and detailed system descriptions. Further, it is essential to include a variety of realistic constraints such as economic factors, safety, reliability, aesthetics, ethics, and social impact.If anything can be said about the last half of the twentieth century, it is that we have had an explosion of information. The amount of data that can be uncovered on most subjects is overwhelming. People in the upper levels of most organizations have assistants who condense most of the things that they must read, hear, or watch. When you begin a search for information, be prepared to scan many of your sources and document their location so that you can find them easily if the date subsequently appear to be important.Some of the sources that are available include the following:1、Exiting solutions. Much can be learned from the current status of solutions toa specific need if actual products can be located, studied and, in some cases, purchased for detailed analysis. An improved solution or an innovative new solution new solution cannot be found unless the existing solutions are thoroughly understood.2、Your library. Many universities have courses that teach you how to use your library. Such courses are easy when you compare them with those in chemistry and calculus, but their importance should not be underestimated. There are many sources in the library that can lead you to the information that you are seeking. You may find what you need in an index such as the Engineering Index. There are many other indexes that provide specialized information. The nature of your problem will direct which ones may be helpful to you. Don’t hesitate to ask for assistance from the librarian. You should use to advantage the computer databases found in libraries and often available through CD-ROM technology.3、Professional organizations. The American Society of Mechanical Engineers isa technical society that will be of interest to students majoring in mechanical engineering. Each major in your college is associated with not one but often several such societies. The National Society of Professional Engineers is an organization that most engineering students well eventually join, as well as at least one technical society such as the society of manufacturing engineers, the American Society of civil engineers (ASCE), or any one of dozens that serve the technical interests of the host of specialties with which professional practices seem most closely associated. May engineers are members of several associations and societies.4、Trade journals. They are published by the hundreds, usually specializing in certain classes of products and services. Money and economics are part of engineering design and decision making. We live in a society that is based on economics and competition. It is no doubt true that many good ideas never get tried because they are deemed to be economically infeasible. Most of us have been aware of this condition in our daily lives. We started with our parents explaining why we could not have some item that we wanted because it cost too much. Likewise, we will not put some very desirable component into our designs because the value gained will not return enough profit in relation to its cost.Industry is continually looking for new products of all types. Some are desired because the current product is not competing well in the marketplace. Others are tried simply because it appears that people will buy them. How do manufacturers know that a new product will be popular? They seldom know with certainty. Statistics is an important consideration in market analysis. Most of you will find that probability and statistics are an integral part of your chosen engineering curriculum. The techniques of this area of mathematics allow us to make inferences about how large groups of people react based on the reactions of a few.中文译文机械设计简介机械设计是为了满足人类需要而制定出的新产品或者改进旧产品时对科学与技术的应用。
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机械设计理论机械设计是一门通过设计新产品或者改进老产品来满足人类需求的应用技术科学。
它涉及工程技术的各个领域，主要研究产品的尺寸、形状和详细结构的基本构思，还要研究产品在制造、销售和使用等方面的问题。
进行各种机械设计工作的人员通常被称为设计人员或者机械设计工程师。
机械设计是一项创造性的工作。
设计工程师不仅在工作上要有创造性，还必须在机械制图、运动学、工程材料、材料力学和机械制造工艺学等方面具有深厚的基础知识。
如前所诉，机械设计的目的是生产能够满足人类需求的产品。
发明、发现和科技知识本身并不一定能给人类带来好处，只有当它们被应用在产品上才能产生效益。
因而，应该认识到在一个特定的产品进行设计之前，必须先确定人们是否需要这种产品。
应当把机械设计看成是机械设计人员运用创造性的才能进行产品设计、系统分析和制定产品的制造工艺学的一个良机。
掌握工程基础知识要比熟记一些数据和公式更为重要。
仅仅使用数据和公式是不足以在一个好的设计中做出所需的全部决定的。
另一方面，应该认真精确的进行所有运算。
例如，即使将一个小数点的位置放错，也会使正确的设计变成错误的。
一个好的设计人员应该勇于提出新的想法，而且愿意承担一定的风险，当新的方法不适用时，就使用原来的方法。
因此，设计人员必须要有耐心，因为所花费的时间和努力并不能保证带来成功。
一个全新的设计，要求屏弃许多陈旧的，为人们所熟知的方法。
由于许多人墨守成规，这样做并不是一件容易的事。
一位机械设计师应该不断地探索改进现有的产品的方法，在此过程中应该认真选择原有的、经过验证的设计原理，将其与未经过验证的新观念结合起来。
新设计本身会有许多缺陷和未能预料的问题发生，只有当这些缺陷和问题被解决之后，才能体现出新产品的优越性。
因此，一个性能优越的产品诞生的同时，也伴随着较高的风险。
应该强调的是，如果设计本身不要求采用全新的方法，就没有必要仅仅为了变革的目的而采用新方法。
在设计的初始阶段，应该允许设计人员充分发挥创造性，不受各种约束。
即使产生了许多不切实际的想法，也会在设计的早期，即绘制图纸之前被改正掉。
只有这样，才不致于堵塞创新的思路。
通常，要提出几套设计方案，然后加以比较。
很有可能在最后选定的方案中，采用了某些未被接受的方案中的一些想法。
心理学家经常谈论如何使人们适应他们所操作的机器。
设计人员的基本职责是努力使机器来适应人们。
这并不是一项容易的工作，因为实际上并不存在着一个对所有人来说都是最优的操作范围和操作过程。
另一个重要问题，设计工程师必须能够同其他有关人员进行交流和磋商。
在开始阶段，设计人员必须就初步设计同管理人员进行交流和磋商，并得到批准。
这一般是通过口头讨论，草图和文字材料进行的。
为了进行有效的交流，需要解决下列问题：（1）所设计的这个产品是否真正为人们所需要？（2）此产品与其他公司的现有同类产品相比有无竞争能力？（3）生产这种产品是否经济？（4）产品的维修是否方便？（5）产品有无销路？是否可以盈利？只有时间能对上述问题给出正确答案。
但是，产品的设计、制造和销售只能在对上述问题的初步肯定答案的基础上进行。
设计工程师还应该通过零件图和装配图，与制造部门一起对最终设计方案进行磋商。
通常，在制造过程中会出现某个问题。
可能会要求对某个零件尺寸或公差作一些更改，使零件的生产变得容易。
但是，工程上的更改必须要经过设计人员批准，以保证不会损伤产品的功能。
有时，在产品的装配时或者装箱外运前的试验中才发现设计中的某种缺陷。
这些事例恰好说明了设计是一个动态过程。
总是存在着更好的方法来完成设计工作，设计人员应该不断努力，寻找这些更好的方法。
近些年来，工程材料的选择已经显得重要。
此外，选择过程应该是一个对材料的连续不断的重新评价过程。
新材料不断出现，而一些原有的材料的能够获得的数量可能会减少。
环境污染、材料的回收利用、工人的健康及安全等方面经常会对材料选择附加新的限制条件。
为了减轻重量或者节约能源，可能会要求使用不同的材料。
来自国内和国际竞争、对产品维修保养方便性要求的提高和顾客的反馈等方面的压力，都会促使人们对材料进行重新评价。
由于材料选用不当造成的产品责任诉讼，已经产生了深刻的影响。
此外，材料与材料加工之间的相互依赖关系已经被人们认识得更清楚。
因此，为了能在合理的成本和确保质量的前提下获得满意的结果，设计工程师的制造工程师都必须认真仔细地选择、确定和使用材料。
制造任何产品的第一步工作都是设计。
设计通常可以分为几个明确的阶段：（a）初步设计；（b）功能设计；（c）生产设计。
在初步设计阶段，设计者着重考虑产品应该具有的功能。
通常要设想和考虑几个方案，然后决定这种思想是否可行；如果可行，则应该对其中一个或几个方案作进一步的改进。
在此阶段，关于材料选择唯一要考虑的问题是：是否有性能符合要求的材料可供选择；如果没有的话，是否有较大的把握在成本和时间都允许的限度内研制出一种新材料。
在功能设计和工程设计阶段，要做出一个切实可行的设计。
在这个阶段要绘制出相当完整的图纸，选择并确定各种零件的材料。
通常要制造出样机或者实物模型，并对其进行试验，评价产品的功能、可靠性、外观和维修保养性等。
虽然这种试验可能会表明，在产品进入到生产阶段之前，应该更换某些材料，但是，绝对不能将这一点作为不认真选择材料的借口。
应该结合产品的功能，认真仔细地考虑产品的外观、成本和可靠性。
一个很有成就的公司在制造所有的样机时，所选用的材料应该和其生产中使用的材料相同，并尽可能使用同样的制造技术。
这样对公司是很有好处的。
功能完备的样机如果不能根据预期的销售量经济地制造出来，或者是样机与正式生产的装置在质量和可靠性方面有很大不同，则这种样机就没有多大的价值。
设计工程师最好能在这一阶段完全完成材料的分析、选择和确定工作，而不是将其留到生产设计阶段去做。
因为，在生产设计阶段材料的更换是由其他人进行的，这些人对产品的所有功能的了解不如设计工程师。
在生产设计阶段中，与材料有关的主要问题是应该把材料完全确定下来，使它们与现有的设备相适应，能够利用现有设备经济地进行加工，而且材料的数量能够比较容易保证供应。
在制造过程中，不可避免地会出现对使用中的材料做一些更改的情况。
经验表明，可采用某些便宜材料作为替代品。
然而，在大多数情况下，在进行生产以后改换材料要比在开始生产前改换材料所花费的代价要高。
在设计阶段做好材料选择工作，可以避免多数这样的情况。
在生产制造开始后出现了可供使用的新材料是更换材料的最常见的原因。
当然，这些新材料可能降低成本、改进产品的性能。
但是，必须对新材料进行认真的评价，以确保其所有性能都满足要求。
应当记住，新材料的性能和可靠性很少像现有材料那样为人们所了解。
大部分的产品失效和产品责任事故案件是由于在选用新材料作为替代材料之前，没有真正了解它们的长期使用性能而引起的。
产品的责任诉讼迫使设计人员和公司在选择材料时，采用最好的程序。
在材料过程中，五个最常见的问题为：（a）不了解或者不会使用关于材料应用方面的最新最好的信息资料；(b)未能预见和考虑擦黑年品可能的合理用途（如有可能，设计人员还应进一步预测和考虑由于产品使用方法不当造成的后果。
在近年来的许多产品责任诉讼案件中，由于错误地使用产品而受到伤害的原告控告生产厂家，并且赢得判决）；(c)所使用的材料的数据不全或是有些数据不确定，尤其是当其长期性能数据是如此的时候；(d)质量控制方法不适当和未经验证；(e)由一些完全不称职的人员选择材料。
通过对上述五个问题的分析，可以得出这些问题是没有充分理由存在的结论。
对这些问题的研究分析可以为避免这些问题的出现指明方向。
尽管采用最好的材料选择方法也不能避免发生产品责任诉讼，设计人员和工业界按照适当的程序进行材料选择，可以大大减少诉讼的数量。
从以上的讨论可以看出，选择材料的人们应该对材料的性质，特点和加工方法有一个全面而基本的了解。
Machine design theoryThe machine design is through designs the new product or improves the old product to meet the human need the application technical science. It involves the project technology each domain, mainly studies the product the size, the shape and the detailed structure basic idea, but also must study the product the personnel which in aspect the and so on manufacture, sale and use question.Carries on each kind of machine design work to be usually called designs the personnel or machine design engineer. The machine design is a creative work. Project engineer not only must have the creativity in the work, but also must in aspect and so on mechanical drawing, kinematics, engineerig material, materials mechanics and machine manufacture technology has the deep elementary knowledge.If front sues, the machine design goal is the production can meet the human need the product. The invention, the discovery and technical knowledge itself certainly not necessarily can bring the advantage to the humanity, only has when they are applied can produce on the product the benefit. Thus, should realize to carries on before the design in a specific product, must first determine whether the people do need this kind of productMust regard as the machine design is the machine design personnel carries on using creative ability the product design, the system analysis and a formulation product manufacture technology good opportunity. Grasps the project elementary knowledge to have to memorize some data and the formula is more important than. The merely service data and the formula is insufficient to the completely decision which makes in a good design needs. On the other hand, should be earnest precisely carries on all operations. For example, even if places wrong a decimal point position, also can cause the correct design to turn wrongly.A good design personnel should dare to propose the new idea, moreover is willing to undertake the certain risk, when the new method is not suitable, use original method. Therefore, designs the personnel to have to have to have the patience, because spends the time and the endeavor certainly cannot guarantee brings successfully. A brand-new design, the request screen abandons obsoletely many, knows very well the method for the people. Because many person of conservativeness, does this certainlyis not an easy matter. A mechanical designer should unceasingly explore the improvement existing product the method, should earnestly choose originally, the process confirmation principle of design in this process, with has not unified it after the confirmation new idea.Newly designs itself can have the question occurrence which many flaws and has not been able to expect, only has after these flaws and the question are solved, can manifest new goods come into the market the product superiority. Therefore, a performance superior product is born at the same time, also is following a higher risk. Should emphasize, if designs itself does not request to use the brand-new method, is not unnecessary merely for the goal which transform to use the new method.In the design preliminary stage, should allow to design the personnel fully to display the creativity, not each kind of restraint. Even if has had many impractical ideas, also can in the design early time, namely in front of the plan blueprint is corrected. Only then, only then does not send to stops up the innovation the mentality. Usually, must propose several sets of design proposals, then perform the comparison. Has the possibility very much in the plan which finally designated, has used certain not in plan some ideas which accepts.How does the psychologist frequently discuss causes the machine which the people adapts them to operate. Designs personnel''s basic responsibility is diligently causes the machine to adapt the people. This certainly is not an easy work, because certainly does not have to all people to say in fact all is the most superior operating area and the operating process.Another important question, project engineer must be able to carry on the exchange and the consultation with other concerned personnel. In the initial stage, designs the personnel to have to carry on the exchange and the consultation on the preliminary design with the administrative personnel, and is approved. This generally is through the oral discussion, the schematic diagram and the writing material carries on. In order to carry on the effective exchange, needs to solve the following problem:(1) designs whether this product truly does need for the people? Whether there is competitive ability(2) does this product compare with other companies'' existing similar products?(3) produces this kind of product is whether economical?(4) product service is whether convenient?(5) product whether there is sale? Whether may gain?Only has the time to be able to produce the correct answer to above question. But, the product design, the manufacture and the sale only can in carry on to the above question preliminary affirmation answer foundation in. Project engineer also should through the detail drawing and the assembly drawing, carries on the consultation together with the branch of manufacture to the finally design proposal.Usually, can have some problem in the manufacture process. Possibly can request to some components size or the common difference makes some changes, causes the components the production to change easily. But, in the project change must have to pass through designs the personnel to authorize, guaranteed cannot damage the product the function. Sometimes, when in front of product assembly or in the packing foreign shipment experiment only then discovers in the design some kind of flaw. These instances exactly showed the design is a dynamic process. Always has a better method to complete the design work, designs the personnel to be supposed unceasingly diligently, seeks these better method.Recent year, the engineerig material choice already appeared importantly. In addition, the choice process should be to the material continuously the unceasing again appraisal process. The new material unceasingly appears, but some original materials can obtain the quantity possibly can reduce. The environmental pollution, material recycling aspect and so on use, worker''s health and security frequently can attach the new limiting condition to the choice of material. In order to reduce the weight or saves the energy, possibly can request the use different material. Comes from domestic and international competition, to product service maintenance convenience request enhancement and customer''s aspect the and so on feedback pressure, can urge the people to carry on to the material reappraises. Because the material does not select when created the product responsibility lawsuit, has already had the profound influence. In addition, the material and between the material processing interdependence is already known by the people clearly. Therefore, in order to can and guarantees the quality in the reasonable cost under the premise to obtainsatisfaction the result, project engineer makes engineers all to have earnestly carefully to choose, the determination and the use material.Makes any product the first step of work all is designs. Designs usually may divide into several explicit stages: (a) preliminary design; (b) functional design; (c) production design. In the preliminary design stage, the designer emphatically considered the product should have function. Usually must conceive and consider several plans, then decided this kind of thought is whether feasible; If is feasible, then should makes the further improvement to or several plans. In this stage, the question which only must consider about the choice of material is: Whether has the performance to conform to the request material to be possible to supply the choice; If no, whether has a bigger assurance all permits in the cost and the time in the limit develops one kind of new material.In the functional design and the engineering design stage, needs to make a practical feasible design. Must draw up the quite complete blueprint in this stage, chooses and determines each kind of components the material. Usually must make the prototype or the working model, and carries on the experiment to it, the appraisal product function, the reliability, the outward appearance and the service maintenance and so on. Although this kind of experiment possibly can indicate, enters in the product to the production base in front of, should replace certain materials, but, absolutely cannot this point take not earnestly chooses the material the excuse. Should unify the product the function, earnestly carefully considers the product the outward appearance, the cost and the reliability. Has the achievement very much the company when manufacture all prototypes, selects the material should the material which uses with its production in be same, and uses the similar manufacture technology as far as possible. Like this has the advantage very much to the company. The function complete prototype if cannot act according to the anticipated sales volume economically to make, or is prototypical and the official production installment has in the quality and the reliable aspect is very greatly different, then this kind of prototype does not have the great value. Project engineer is best can completely complete the material in this stage the analysis, the choice and the determination work, but is not remains it to the production design stage does. Because, is carries on in the productiondesign stage material replacement by other people, these people are inferior to project engineer to the product all functions understanding. In the production design stage, is should completely determine with the material related main question the material, causes them to adapt with the existing equipment, can use the existing equipment economically to carry on the processing, moreover the material quantity can quite be easy to guarantee the supply.In the manufacture process, inevitably can appear to uses the material to make some changes the situation. The experience indicated that, may use certain cheap materials to take the substitute. However, in the majority situation, in will carry on the production later to change the material to have in to start before the production to change the price which the material will spend to have to be higher than. Completes the choice of material work in the design stage, may avoid the most such situations. Started after the production manufacture to appear has been possible to supply the use the new material is replaces the material the most common reason. Certainly, these new materials possibly reduce the cost, the improvement product performance. But, must carry on the earnest appraisal to the new material, guarantees its all performance all to answer the purpose. Must remember that, the new material performance and the reliable very few pictures materials on hand such understood for the people. The majority of products expiration and the product accident caused by negligence case is because in selects the new material to take in front of substitution material, not truly understood their long-term operational performance causes.The product responsibility lawsuit forces designs the personnel and the company when the choice material, uses the best procedure. In the material process, five most common questions are: (a) did not understand or cannot use about the material application aspect most newly the best information paper; (b) has not been able to foresee and to consider the dusk year possible reasonable use (for example to have the possibility, designs the personnel also to be supposed further to forecast and the consideration because product application method not when creates consequence. ecent years many products responsibilities lawsuit case, because wrongly uses the plaintiff which the product receives the injury to accuse produces the factory, and wins the decision); (c) uses the material data not entire perhaps some data areindefinite, works as its long-term performance data is the like this time in particular;(d) the quality control method is not suitable and not after the confirmation; (e) the personnel which completely is not competent for the post by some chooses the material.Through to the above five questions analysis, may obtain these questions is does not have the sufficient reason existence the conclusion. May for avoid these questions to these questions research analyses the appearance indicating the direction. Although uses the best choice of material method not to be able to avoid having the product responsibility lawsuit, designs the personnel and the industry carries on the choice of material according to the suitable procedure, may greatly reduce the lawsuit the quantity.May see from the above discussion, the choice material people should to the material nature, the characteristic and the processing method have comprehensive and the basic understanding.。