外文翻译--汽车后底板的冲压模具设计分析中文版

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【汽车专业文献翻译】汽车后底板的冲压模具设计分析

汽车后底板的冲压模具设计分析Fuh－kuo Chen，Jia－Hong Liu台湾国立大学机械工程系，台北，台湾1994年10月10日接收摘要本文研究了客车后底板的冲压制造过程。

使用圆栅格分析和3-D有限元方法，对产生拉深开裂缺陷的最初的冲模设计进行了分析。

开裂缺陷是由于压边圈下大范围的金属限制了向杯状区域的流动。

优化的冲模设计，包括一个分离的冲模面和一个楔形机构组成的凹模结构，目的是在不添加工序的情况下，向杯状区域提供额外金属、消除开裂缺陷。

这种优化的冲模设计在第一次和第二次拉深的圆栅格分析结果中得到验证，获得了合格的拉深面板。

关键字：冲压模具；后底板；开裂；圆栅格分析1.绪论一般冲压过程中的主要缺陷是开裂，在最近的十年中，很多研究都使用了成型极限分析和有限元分析方法来研究开裂问题的起因和解决办法。

自Keeler和Backofen在1963年第一次引入成型极限图（FLDS），在冲压车间里它们就已经被广泛的使用在金属的结构分析中。

即使这个成型过程极快，FLDS也可以显示出应力并提供一个有用的工具去测定，同时有限元方法能够精确的计算冲压部分的分布应力，并且预知是否可能产生开裂缺陷。

一般来说，解决开裂问题的办法是在主要的拉深过程开始前，向危险地带提供更多的金属，这样可以通过减少压边圈的压力或是改善润滑条件而达到，但是为了输送更多的金属到危险区域，最好最直接的方法是增加一个额外的工序，然而，这个额外的工序会多增加一套模具和额外的劳力从而增加生产成本。

在目前的研究中，优化的模具设计，包括一个分离的冲模面和一个楔形机构组成的凹模结构，目的是为了消除发生在客车面板冲压过程中的开裂缺陷。

这种特殊的模具面和楔形结构能为发生开裂缺陷的危险区域提供额外的金属，而不增加额外的工序。

圆栅格分析和3-D有限元仿真能够完成开裂缺陷分析的任务。

2.问题描述客车后面板的设计通常是由两块冲压板焊合在一起，如图1所示。

之所以选择两块板设计是由于开裂往往是发生在拉深成杯状的壁上，使得冲压一块后底板很困难，如图2所示。

冲压工艺与外文翻译文档

12.外文翻译1. The mold designing and manufacturingThe mold is the manufacturing industry important craft foundation, in our country, the mold manufacture belongs to the special purpose equipment manufacturing industry. China although very already starts to make the mold and the use mold, but long-term has not formed the industry. Straight stabs 0 centuries 80's later periods, the Chinese mold industry only then drives into the development speedway. Recent years, not only the state-owned mold enterprise had the very big development, the three investments enterprise, the villages and towns (individual) the mold enterprise's development also rapid quietly.Although the Chinese mold industrial development rapid, but compares with the demand, obviously falls short of demand, its main gap concentrates precisely to, large-scale, is complex, the long life mold domain. As a result of in aspect and so on mold precision, life, manufacture cycle and productivity, China and the international average horizontal and the developedcountry still had a bigger disparity, therefore, needed massively to import the mold every year .The Chinese mold industry must continue to sharpen the productivity, from now on will have emphatically to the profession internal structure adjustment and the state-of-art enhancement. The structure adjustment aspect, mainly is the enterprise structure to the specialized adjustment, the product structure to center the upscale mold development, to the import and export structure improvement, center the upscale automobile cover mold forming analysis and the structure improvement, the multi-purpose compound mold and the compound processing and the laser technology in the mold design manufacture application, the high-speed cutting, the super finishing and polished the technology, the information direction develops .The recent years, the mold profession structure adjustment and the organizational reform step enlarges, mainly displayed in, large-scale, precise, was complex, the long life, center the upscale mold and the mold standard letter development speed is higher than the common mold product; The plastic mold and the compressioncasting mold proportion increases; Specialized mold factory quantity and its productivity increase; "The three investments" and the private enterprise develops rapidly; The joint stock system transformation step speeds up and so on. Distributes from the area looked, take Zhejiang Delta and Yangtze River delta as central southeast coastal area development quickly to mid-west area, south development quickly to north. At present develops quickest, the mold produces the most centralized province is Guangdong and Zhejiang, places such as Jiangsu, Shanghai, Anhui and Shandong also has a bigger development in recent years.1.模具设计及制造模具是制造业的重要工艺基础，在我国模具制造属于专用设备制造业。

外文翻译-冲压模具设计成型方面

英文翻译4 Sheet metal forming and blanking4.1 Principles of die manufacture4.1.1 Classification of diesIn metalforming,the geometry of the workpiece is established entirely or partially by the geometry of the die.In contrast to machining processes,ignificantly greater forces are necessary in forming.Due to the complexity of the parts,forming is often not carried out in a single operation.Depending on the geometry of the part,production is carried out in several operational steps via one or several production processes such as forming or blanking.One operation can also include several processes simultaneously(cf.Sect.2.1.4).During the design phase,the necessary manufacturing methods as well as the sequence and number of production steps are established in a processing plan(Fig.4.1.1).In this plan,the availability of machines,the planned production volumes of the part and other boundary conditions are taken into account.The aim is to minimize the number of dies to be used while keeping up a high level of operational reliability.The parts are greatly simplified right from their design stage by close collaboration between the Part Design and Production Departments in order to enable several forming and related blanking processes to be carried out in one forming station.Obviously,the more operations which are integrated into a single die,the more complex the structure of the die becomes.The consequences are higher costs,a decrease in output and a lower reliability.Fig.4.1.1 Production steps for the manufacture of an oil sumpTypes of diesThe type of die and the closely related transportation of the part between dies is determined in accordance with the forming procedure,the size of the part in question and the production volume of parts to be produced.The production of large sheet metal parts is carried out almost exclusively using single sets of dies.Typical parts can be found in automotive manufacture,the domestic appliance industry and radiator production.Suitable transfer systems,for example vacuum suction systems,allow the installation of double-action dies in a sufficiently large mounting area.In this way,for example,the right and left doors of a car can be formed jointly in one working stroke(cf.Fig.4.4.34).Large size single dies are installed in large presses.The transportation of the parts from one forming station to another is carried out mechanically.In a press line with single presses installed one behind the other,feeders or robots can be used(cf.Fig.4.4.20 to 4.4.22),whilst in large-panel transfer presses,systems equipped with gripper rails(cf.Fig.4.4.29)or crossbar suction systems(cf.Fig.4.4.34)are used to transfer the parts.Transfer dies are used for the production of high volumes of smaller and medium size parts(Fig.4.1.2).They consist of several single dies,which are mounted on a common base plate.The sheet metal is fed through mostly in blank form and also transported individually from die to die.If this part transportation is automated,the press is called a transfer press.The largest transfer dies are used together with single dies in large-panel transferpresses(cf.Fig.4.4.32).In progressive dies,also known as progressive blanking dies,sheet metal parts are blanked in several stages;generally speaking no actual forming operation takes place.The sheet metal is fed from a coil or in the form of metal ing an appropriate arrangement of the blanks within the available width of the sheet metal,an optimal material usage is ensured(cf.Fig.4.5.2 to 4.5.5). The workpiece remains fixed to the strip skeleton up until the laFig.4.1.2 Transfer die set for the production of an automatic transmission for an automotive application-st operation.The parts are transferred when the entire strip is shifted further in the work flow direction after the blanking operation.The length of the shift is equal to the center line spacing of the dies and it is also called the step width.Side shears,very precise feeding devices or pilot pins ensure feed-related part accuracy.In the final production operation,the finished part,i.e.the last part in the sequence,is disconnected from the skeleton.A field of application for progressive blanking tools is,for example,in the production of metal rotors or stator blanks for electric motors(cf.Fig.4.6.11 and 4.6.20).In progressive compound dies smaller formed parts are produced in several sequential operations.In contrast to progressive dies,not only blanking but also forming operations are performed.However, the workpiece also remains in the skeleton up to the last operation(Fig.4.1.3 and cf.Fig.4.7.2).Due to the height of the parts,the metal strip must be raised up,generally using lifting edges or similar lifting devices in order to allow the strip metal to be transported mechanically.Pressed metal parts which cannot be produced within a metal strip because of their geometrical dimensions are alternatively produced on transfer sets.Fig.4.1.3 Reinforcing part of a car produced in a strip by a compound die setNext to the dies already mentioned,a series of special dies are available for special individual applications.These dies are,as a rule,used separately.Special operations make it possible,however,for special dies to be integrated into an operational Sequence.Thus,for example,in flanging dies several metal parts can be joined together positively through the bending of certain metal sections(Fig.4.1.4and cf.Fig.2.1.34).During this operation reinforcing parts,glue or other components can be introduced.Other special dies locate special connecting elements directly into the press.Sorting and positioning elements,for example,bring stamping nuts synchronised with the press cycles into the correct position so that the punch heads can join them with the sheet metal part(Fig.4.1.5).If there is sufficient space available,forming and blanking operations can be carried out on the same die.Further examples include bending,collar-forming,stamping,fine blanking,wobble blanking and welding operations(cf.Fig.4.7.14 and4.7.15).Fig.4.1.4 A hemming dieFig.4.1.5 A pressed part with an integrated punched nut4.1.2 Die developmentTraditionally the business of die engineering has been influenced by the automotive industry.The following observations about the die development are mostly related to body panel die construction.Essential statements are,however,made in a fundamental context,so that they are applicable to all areas involved with the production of sheet-metal forming and blanking dies.Timing cycle for a mass produced car body panelUntil the end of the 1980s some car models were still being produced for six to eight years more or less unchanged or in slightly modified form.Today,however,production time cycles are set for only five years or less(Fig.4.1.6).Following the new different model policy,the demands ondie makers have also changed prehensive contracts of much greater scope such as Simultaneous Engineering(SE)contracts are becoming increasingly common.As a result,the die maker is often involved at the initial development phase of the metal part as well as in the planning phase for the production process.Therefore,a much broader involvement is established well before the actual die development is initiated.Fig.4.1.6 Time schedule for a mass produced car body panelThe timetable of an SE projectWithin the context of the production process for car body panels,only a minimal amount of time is allocated to allow for the manufacture of the dies.With large scale dies there is a run-up period of about 10 months in which design and die try-out are included.In complex SE projects,which have to be completed in 1.5 to 2 years,parallel tasks must be carried out.Furthermore,additional resources must be provided before and after delivery of the dies.These short periods call for pre-cise planning,specific know-how,available capacity and the use of the latest technological and communications systems.The timetable shows the individual activities during the manufacturing of the dies for the production of the sheet metal parts(Fig.4.1.7).The time phases for large scale dies are more or less similar so that this timetable can be considered to be valid in general.Data record and part drawingThe data record and the part drawing serve as the basis for all subsequent processing steps.They describe all the details of the parts to be produced. The information given in theFig.4.1.7 Timetable for an SE projectpart drawing includes: part identification,part numbering,sheet metal thickness,sheet metal quality,tolerances of the finished part etc.(cf.Fig.4.7.17).To avoid the production of physical models(master patterns),the CAD data should describe the geometry of the part completely by means of line,surface or volume models.As a general rule,high quality surface data with a completely filleted and closed surface geometry must be made available to all the participants in a project as early as possible.Process plan and draw developmentThe process plan,which means the operational sequence to be followed in the production of the sheet metal component,is developed from the data record of the finished part(cf.Fig.4.1.1).Already at this point in time,various boundary conditions must be taken into account:the sheet metal material,the press to be used,transfer of the parts into the press,the transportation of scrap materials,the undercuts as well as thesliding pin installations and their adjustment.The draw development,i.e.the computer aided design and layout of the blank holder area of the part in the first forming stage–if need bealso the second stage–,requires a process planner with considerable experience(Fig.4.1.8).In order to recognize and avoid problems in areas which are difficult to draw,it is necessary to manufacture a physical analysis model of the draw development.With this model,theforming conditions of the drawn part can be reviewed and final modifications introduced,which are eventually incorporated into the data record(Fig.4.1.9).This process is being replaced to some extent by intelligent simulation methods,throughwhich the potential defects of the formed component can be predicted and analysed interactively on the computer display.Die designAfter release of the process plan and draw development and the press,the design of the die can be started.As a rule,at this stage,the standards and manufacturing specifications required by the client must be considered.Thus,it is possible to obtain a unified die design and to consider the particular requests of the customer related to warehousing of standard,replacement and wear parts.Many dies need to be designed so that they can be installed in different types of presses.Dies are frequently installed both in a production press as well as in two different separate back-up presses.In this context,the layout of the die clamping elements,pressure pins and scrap disposal channels on different presses must be taken into account.Furthermore,it must be noted that drawing dies working in a single-action press may be installed in a double-action press(cf.Sect.3.1.3 and Fig.4.1.16).Fig.4.1.8 CAD data record for a draw developmentIn the design and sizing of the die,it is particularly important to consider the freedom of movement of the gripper rail and the crossbar transfer elements(cf.Sect.4.1.6).These describe the relative movements between the components of the press transfer system and the die components during a complete press working stroke.The lifting movement of the press slide,the opening and closing movements of the gripper rails and the lengthwise movement of the whole transfer are all superimposed.The dies are designed so that collisions are avoided and a minimum clearance of about 20 mm is set between all the moving parts.4 金属板料的成形及冲裁4. 模具制造原理4.1.1模具的分类在金属成形的过程中，工件的几何形状完全或部分建立在模具几何形状的基础上的。

冲压模具设计外文翻译

冲压模具设计外文翻译摘录：在这一篇论文中，对滚动接触机械装置上的滚动接触体结构柔性变形的效果简短地分析。

轮副和轨道对轮的潜变力的结构变形的效果和轨条详细地被分析研究。

轮副的一般结构柔性变形和轨道首先分别用有限元的机械要素方法和关系一起分析,从而获得表达滚动方向和轮副的横方向的结构柔性变形和对应的负载。

按照它们之间的关系,我们计算轮和轨条的在一点相接接触的影响力系数。

影响力系数代表发生在轮/轨道接触的一个小的矩形面积上的单位面积的牵引力引起的结构柔性变形。

他们习惯校订一些与Kalker的无赫兹的形状滚动接触的三维空间的有柔性体的理论Bossinesq 和Cerruti 的公式一起获得的影响力系数。

在潜变力的分析中, 利用了修正的 Kalker 的理论。

从轮副和轨道的结构柔性变形中获得的数字结果表明潜变力发挥的很大影响力。

关键字: 轮/轨条; 滚动接触;潜变力;柔性变形结构1.介绍由于火车轮副和轨道之间的很大相对运动作用力引起轮副和轨道的结构较大的柔性变形。

大的结构变形极大影轮和轨条响滚动接触的性能,如潜变力，波形 [1 – 3] ，黏着，滚动接触疲劳, 噪音 [4,5] 和脱轨[6]等等. 到现在为止在轮/ 轨道的潜变力的分析中广泛应用的滚动接触理论是以柔性一半的空间假定为基础的 [7 –12]. 换句话说，轮/ 轨道的一个接触的柔性变形和牵引之间的关系可以用Bossinesq和 Cerruti的理论公式表达。

实际, 当轮副在轨道上持续运动,接触的柔性变形是比那些以滚动接触的现在理论公式计算的更大。

因为轮副/ 轨道的挠性是比柔性一半的空间更加大。

由对应的负荷所引起的轮副/ 轨道柔性变形结构在图中被显示。

如 1 和 2. 在图中轮副弯曲变形被显示出来。

在图 1a 中被显示的轮副弯曲变形主要由车辆和轮副/轨条的垂直动载荷所引起。

在图 1 b 中描述的轮副扭转的变形是由于轮和轨道之间的纵潜变力的作用生产的。

冲压模具外文英语文献翻译

外文翻译Heat Treatment of Die and Mould Oriented Concurrent Design LI Xiong,ZHANG Hong-bing,RUAN Xue —yu,LUO Zhong —hua,ZHANG YanTraditional die and mould design,mainly by experience or semi —experience ，is isolated from manufacturing process.Before the design is finalized ，the scheme of die and mould is usually modified time and again ，thus some disadvantages come into being,such as long development period,high cost and uncertain practical effect.Due to strong desires for precision,service life,development period and cost,modern die and mould should be designed and manufactured perfectly.Therefore more and more advanced technologies and innovations have been applied,for example,concurrent engineering,agile manufacturing virtual manufacturing,collaborative design,etc.Heat treatment of die and mould is as important as design,manufacture and assembly because it has a vital effect on manufacture ，assembly and service life ．Design and manufacture of die and mould have progressed rapidly ，but heat treatment lagged seriously behind them ．As die and mould industry develops ，heat treatment must ensure die and mould there are good state of manufacture ，assembly and wear —resistant properties by request. Impertinent heat treatment can influence die and mould manufacturing such as over —hard and —soft and assembly ．Traditionally the heat treatment process was made out according to the methods and properties brought forward Abstract:Many disadvantages exist in the traditional die design method which belongsto serial pattern. It is well known that heat treatment is highly important to thedies. A new idea of concurrent design for heat treatment process of die andmould was developed in order to overcome the existent shortcomings of heattreatment process. Heat treatment CAD/CAE was integrated with concurrentcircumstance and the relevant model was built. These investigations canremarkably improve efficiency, reduce cost and ensure quality of R and D forproducts.Key words:die design; heat treatment; mouldby designer．This could make the designers of die and mould and heat treatment diverge from each other，for the designers of die and mould could not fully realize heat treatment process and materials properties，and contrarily the designers rarely understood the service environment and designing thought. These divergences will impact the progress of die and mould to a great extent. Accordingly，if the process design of heat treatment is considered in the early designing stage，the aims of shortening development period，reducing cost and stabilizing quality will be achieved and the sublimation of development pattern from serial to concurrent will be realized．Concurrent engineering takes computer integration system as a carrier,at the very start subsequent each stage and factors have been considered such as manufacturing，heat treating，properties and so forth in order to avoid the error．The concurrent pattern has dismissed the defect of serial pattern,which bring about a revolution against serial pattern．In the present work．the heat treatment was integrated into the concurrent circumstance of the die and mould development，and the systemic and profound research was performed．1 Heat Treatment Under Concurrent CircumstanceThe concurrent pattern differs ultimately from the serial pattern(see Fig．1).With regard to serial pattern，the designers mostly consider the structure and function of die and mould，yet hardly consider the consequent process，so that the former mistakes are easily spread backwards．Meanwhile，the design department rarely communicates with the assembling，cost accounting and sales departments．These problems certainly will influence the development progress of die and mould and the market foreground．Whereas in the concurrent pattern，the relations among departments are close，the related departments all take part in the development progress of die and mould and have close intercommunion with purchasers．This is propitious to elimination of the conflicts between departments，increase the efficiency and reduce the cost．Heat treatment process in the concurrent circumstance is made out not after blueprint and workpiece taken but during die and mould designing．In this way，it is favorable to optimizing the heat treatment process and making full use of the potential of the materials．2 Integration of Heat Treatment CAD／CAE for Die and MouldIt can be seen from Fig．2 that the process design and simulation of heat treatment are the core of integration frame．After information input via product design module and heat treatment process generated via heat treatment CAD and heat treatment CAE module will automatically divide the mesh for parts drawing，simulation temperature field microstructure analysis after heat—treatment and the defect of possible emerging (such as overheat,over burning)，and then the heat treatment process is judged if the optimization is made according to the result reappeared by stereoscopic vision technology．Moreover tool and clamping apparatus CAD and CAM are integrated into this system．The concurrent engineering based integration frame can share information with other branch．That makes for optimizing the heat treatment process and ensuring the process sound．2.1 3-D model and stereoscopic vision technology for heat treatmentThe problems about materials，structure and size for die and mould can be discovered as soon as possible by 3-D model for heat treatment based on the shape of die and mould．Modeling heating condition and phase transformation condition for die and mould during heat treatment are workable，because it has been broken through for the calculation of phase transformation thermodynamics，phase transformation kinetics，phase stress,thermal stress，heat transfer，hydrokinetics etc．For example，3-D heat—conducting algorithm models for local heating complicated impression and asymmetric die and mould，and M ARC software models for microstructure transformation was used．Computer can present the informations of temperature，microstructure and stress at arbitrary time and display the entire transformation procedure in the form of 3-D by coupling temperature field,microstructure field and stress field．If the property can be coupled,various partial properties can be predicted by computer．2.2 Heat treatment process designDue to the special requests for strength，hardness，surface roughness and distortion during heat treatment for die and mould，the parameters including quenching medium type，quenching temperature and tempering temperature and time，must be properlyselected，and whether using surface quenching or chemical heat treatment the parameters must be rightly determined．It is difficult to determine the parameters by computer fully．Since computer technology develops quickly in recent decades,the difficulty with large—scale calculation has been overcome．By simulating and weighing the property，the cost and the required period after heat treatment．it is not difficult to optimize the heat treatment process．2.3 Data base for heat treatmentA heat treatment database is described in Fig．3．The database is the foundation of making out heat treatment process．Generally，heat treatment database is divided into materials database and process database．It is an inexorable trend to predict the property by materials and process．Although it is difficult to establish a property database，it is necessary to establish the database by a series of tests．The materials database includes steel grades,chemical compositions，properties and home and abroad grades parallel tables．The process database includes heat treatment criterions，classes，heat preservation time and cooling velocity．Based on the database，heat treatment process can be created by inferring from rules．2.4 Tool and equipment for heat treatmentAfter heat treatment process is determined，tool and equipment CAD／CAE systemtransfers the information about design and manufacture to the numerical control device．Through rapid tooling prototype，the reliability of tool and the clamping apparatus can be judged．The whole procedure is transferred by network，in which there is no man—made interference．3 Key Technique3.1 Coupling of temperature，microstructure，stress and propertyHeat treatment procedure is a procedure of temperature-microstructure—stress interaction．The three factors can all influence the property (see Fig．4)．During heating and cooling，hot stress and transformation will come into being when microstructure changes.Transformation temperature-microstructure and temperature—microstructure—and stress-property interact on each other．Research on the interaction of the four factors has been greatly developed,but the universal mathematic model has not been built．Many models fit the test nicely，but they cannot be put into practice．Difficulties with most of models are solved in analytic solution，and numerical method is employed so that the inaccuracy of calculation exists．Even so，comparing experience method with qualitative analysis，heat treatment simulation by computer makes great progress．3.2 Establishment and integration of modelsThe development procedure for die and mould involves design,manufacture，heat treatment，assembly，maintenance and so on．They should have own database and mode1．They are in series with each other by the entity—relation model．Through establishing and employing dynamic inference mechanism，the aim of optimizing design can be achieved．The relation between product model and other models was built．The product model will change in case the cell model changes．In fact，it belongs to the relation of data with die and mould．After heat treatment model is integrated into the system，it is no more an isolated unit but a member which is close to other models in the system．After searching，calculating and reasoning from the heat treatment database,procedure for heat treatment，which is restricted by geometric model,manufacture model for die and mould and by cost and property，is obtained．If the restriction is disobeyed，the system will send out the interpretative warning．All design cells are connected by communication network．3.3 Management and harmony among membersThe complexity of die and mould requires closely cooperating among item groups．Because each member is short of global consideration for die and mould development，they need to be managed and harmonized．Firstly,each item group should define its own control condition and resource requested,and learn of the request of up- and-down working procedure in order to avoid conflict．Secondly，development plan should be made out and monitor mechanism should be established．The obstruction can be duly excluded in case the development is hindered．Agile management and harmony redound to communicating information，increasing efficiency，and reducing redundancy．Meanwhile it is beneficial for exciting creativity，clearing conflict and making the best of resource．4 Conclusions(1) Heat treatment CAD／CAE has been integrated into concurrent design for die and mould and heat treatment is graphed,which can increase efficiency，easily discover problems and clear conflicts．(2)Die and mould development is performed on the same platform．When the heat treatment process is made out，designers can obtain correlative information and transfer self-information to other design departments on the platform．(3)Making out correct development schedule and adjusting it in time can enormously shorten the development period and reduce cost．References：[1] ZHOU Xiong-hui，PENG Ying-hong．The Theory and Technique of Modern Die and Mould Design and Manufacture[M]．Shanghai：Shanghai Jiaotong University Press 2000(in Chinese)．[2] Kang M，Park& Computer Integrated Mold Manufacturing[J]．Int J Computer Integrated Manufacturing，1995，5：229-239．[3] Yau H T，Meno C H．Concurrent Process Planning for Finishing Milling and Dimensional Inspection of Sculptured Surface in Die and Mould Manufacturing[J]．Int J Product Research，1993，31(11)：2709—2725．[4] LI Xiang，ZHOU Xiong-hui，RUAN Xue-yu．Application of Injection Mold Collaborative Manufacturing System [J]．JournaI of Shanghai Jiaotong University，2000，35(4)：1391-1394．[5] Kuzman K，Nardin B，Kovae M ,et a1．The Integration of Rapid Prototyping and CAE in Mould Manufacturing[J]．J Materials Processing Technology，2001，111：279—285．[6] LI Xiong，ZHANG Hong—bing，RUAN Xue-yu，et a1．Heat Treatment Process Design Oriented Based on Concurrent Engineering[J]．Journal of Iron and Steel Research，2002，14(4)：26—29．文献出处：LI Xiong,ZHANG Hong-bing,RUAN Xue—yu,LUO Zhong—hua,ZHANG Yan.Heat Treatment of Die and Mould Oriented Concurrent Design[J].Journal of Iron and Steel Research，2006,13(1):40- 43，74模具热处理及其导向平行设计李雄，张鸿冰，阮雪榆，罗中华，张艳摘要：在一系列方式中，传统模具设计方法存在许多缺点。

冲压模具设计毕业外文翻译中英文翻译外文文献翻译

冲压模具设计毕业外文翻译中英文翻译外文文献翻译毕业设计(论文)外文资料翻译系部:专业:姓名:学号:外文出处: The Pofessional English of DesignManufacture for Dies & Moulds附件: 1.外文资料翻译译文,2.外文原文。

指导教师评语:签名:年月日附件1:外文资料翻译译文冲压模具设计对于汽车行业与电子行业，各种各样的板料零件都是有各种不同的成型工艺所生产出来的，这些均可以列入一般种类“板料成形”的范畴。

板料成形(也称为冲压或压力成形)经常在厂区面积非常大的公司中进行。

如果自己没有去这些大公司访问，没有站在巨大的机器旁，没有感受到地面的震颤，没有看巨大型的机器人的手臂吧零件从一个机器移动到另一个机器，那么厂区的范围与价值真是难以想象的。

当然，一盘录像带或一部电视专题片不能反映出汽车冲压流水线的宏大规模。

站在这样的流水线旁观看的另一个因素是观看大量的汽车板类零件被进行不同类型的板料成形加工。

落料是简单的剪切完成的，然后进行不同类型的加工，诸如:弯曲、拉深、拉延、切断、剪切等，每一种情况均要求特殊的、专门的模具。

而且还有大量后续的加工工艺，在每一种情况下，均可以通过诸如拉深、拉延与弯曲等工艺不同的成形方法得到所希望的得到的形状。

根据板料平面的各种各样的受应力状态的小板单元体所可以考虑到的变形情形描述三种成形，原理图1描述的是一个简单的从圆坯料拉深成一个圆柱水杯的成形过程。

图1 板料成形一个简单的水杯拉深是从凸缘型坯料考虑的，即通过模具上冲头的向下作用使材料被水平拉深。

一个凸缘板料上的单元体在半径方向上被限定，而板厚保持几乎不变。

板料成形的原理如图2所示。

拉延通常是用来描述在板料平面上的两个互相垂直的方向被拉长的板料的单元体的变形原理的术语。

拉延的一种特殊形式，可以在大多数成形加工中遇到，即平面张力拉延。

在这种情况下，一个板料的单元体仅在一个方向上进行拉延，在拉长的方向上宽度没有发生变化，但是在厚度上有明确的变化，即变薄。

模具设计相关专业毕业论文(外文原文+翻译)之翻译[管理资料]

可行成形图在汽车覆盖件冲压工艺高效设计的应用Dae-Cheol Ko a，Seung-Hoon Cha b，Sang-Kon Lee c，Chan-Joo Lee b，Byung-Min Kim d,*a ILIC, Pusan National University, 30 Jangjeon-Dong, Kumjeong-Gu, Busan609-735, South Koreab Precision Manufacturing Systems Division, Pusan National University, 30Jangjeon-Dong, Kumjeong-Gu, Busan 609-735, South Koreac PNU-IFAM, Joint Research Center, Pusan National University, 30Jangjeon-Dong, Kumjeong-Gu, Busan 609-735, South Koread School of Mechanical Engineering, Pusan National University, 30 Jangjeon-Dong, Kumjeong-Gu, Busan 609-735, South Korea摘要：本文提出使用可行的成形图来表示无断裂和起皱的安全区域，进而有效和快速地设计冲压工艺方法。

要确定可行的成形图，有限元分析对应于正交实验设计的过程变量组合。

随后，基于成形极限图的有限元分析，确定断裂和起皱的特征值。

所有组合的特征值在整个过程中，通过人工神经网络训练进行了一系列预测。

可行的成形图从所有组合的过程变量中最终确定。

以汽车覆盖件如转动架和车轮毂的冲压工艺作为实例来验证利用成形图的进行过程设计有效性。

有限元模拟结果与实验模拟结果比较表明，利用可行的成形图来进行冲压工艺的设计是有效的并适用于实际的过程。

冲压模具设计成型方面毕业设计外文翻译

毕业设计（论文）英文翻译课题名称系部材料工程系专业材料成型及控制工程班级学号姓名指导教师2 0 10年3 月 10日4 Sheet metal forming and blanking4.1 Principles of die manufacture4.1.1 Classification of diesIn metalforming,the geometry of the workpiece is established entirely or partially by the geometry of the die.In contrast to machining processes,ignificantly greater forces are necessary in forming.Due to the complexity of the parts,forming is often not carried out in a single operation.Depending on the geometry of the part,production is carried out in several operational steps via one or several production processes such as forming or blanking.One operation can also include several processes simultaneously(cf.Sect.2.1.4).During the design phase,the necessary manufacturing methods as well as the sequence and number of production steps are established in a processing plan(Fig.4.1.1).In this plan,the availability of machines,the planned production volumes of the part and other boundary conditions are taken into account.The aim is to minimize the number of dies to be used while keeping up a high level of operational reliability.The parts are greatly simplified right from their design stage by close collaboration between the Part Design and Production Departments in order to enable several forming and related blanking processes to be carried out in one forming station.Obviously,the more operations which are integrated into a single die,the more complex the structure of the die becomes.The consequences are higher costs,a decrease in output and a lower reliability.Fig.4.1.1 Production steps for the manufacture of an oil sumpTypes of diesThe type of die and the closely related transportation of the part between dies is determined in accordance with the forming procedure,the size of the part in question and the production volume of parts to be produced.The production of large sheet metal parts is carried out almost exclusively using single sets of dies.Typical parts can be found in automotive manufacture,the domestic appliance industry and radiator production.Suitable transfer systems,for example vacuum suction systems,allow the installation of double-action dies in a sufficiently large mounting area.In this way,for example,the right and left doors of a car can be formed jointly in one working stroke(cf.Fig.4.4.34).Large size single dies are installed in large presses.The transportation of the parts from one forming station to another is carried out mechanically.In a press line with single presses installed one behind the other,feeders or robots can be used(cf.Fig.4.4.20 to 4.4.22),whilst in large-panel transfer presses,systems equipped with gripper rails(cf.Fig.4.4.29)or crossbar suction systems(cf.Fig.4.4.34)are used to transfer the parts.Transfer dies are used for the production of high volumes of smaller and medium size parts(Fig.4.1.2).They consist of several single dies,which are mounted on a common base plate.The sheet metal is fed through mostly in blank form and also transported individually from die to die.If this part transportation is automated,the press is called a transfer press.The largest transfer dies are used together with single dies in large-panel transfer presses(cf.Fig.4.4.32).In progressive dies,also known as progressive blanking dies,sheet metal parts are blanked in several stages;generally speaking no actual forming operation takes place.The sheet metal is fed from a coil or in the form of metal ing an appropriate arrangement of the blanks within the available width of the sheet metal,an optimal material usage is ensured(cf.Fig.4.5.2 to 4.5.5). The workpiece remains fixed to the strip skeleton up until the laFig.4.1.2 Transfer die set for the production of an automatic transmission for an automotive application-st operation.The parts are transferred when the entire strip is shifted further in the work flow direction after the blanking operation.The length of the shift is equal to the center line spacing of the dies and it is also called the step width.Side shears,very precise feeding devices or pilot pins ensure feed-related part accuracy.In the final production operation,the finished part,i.e.the last part in the sequence,is disconnected from the skeleton.A field of application for progressive blanking tools is,for example,in the production of metal rotors or stator blanks for electric motors(cf.Fig.4.6.11 and 4.6.20).In progressive compound dies smaller formed parts are produced in several sequential operations.In contrast to progressive dies,not only blanking but also forming operations are performed.However, the workpiece also remains in the skeleton up to the last operation(Fig.4.1.3 and cf.Fig.4.7.2).Due to the height of the parts,the metal strip must be raised up,generally using lifting edges or similar lifting devices in order to allow the strip metal to be transported mechanically.Pressed metal parts which cannot be produced within a metal strip because of their geometrical dimensions are alternatively produced on transfer sets.Fig.4.1.3 Reinforcing part of a car produced in a strip by a compound die setNext to the dies already mentioned,a series of special dies are available for special individual applications.These dies are,as a rule,used separately.Special operations make it possible,however,for special dies to be integrated into an operational Sequence.Thus,for example,in flanging dies several metal parts can be joined together positively through the bending of certain metal sections(Fig.4.1.4and cf.Fig.2.1.34).During this operation reinforcing parts,glue or other components can be introduced.Other special dies locate special connecting elements directly into the press.Sorting and positioning elements,for example,bring stamping nuts synchronised with the press cycles into the correct position so that the punch heads can join them with the sheet metal part(Fig.4.1.5).If there is sufficient space available,forming and blanking operations can be carried out on the same die.Further examples include bending,collar-forming,stamping,fine blanking,wobble blanking and welding operations(cf.Fig.4.7.14 and4.7.15).Fig.4.1.4 A hemming dieFig.4.1.5 A pressed part with an integrated punched nut4.1.2 Die developmentTraditionally the business of die engineering has been influenced by the automotive industry.The following observations about the die development are mostly related to body panel die construction.Essential statements are,however,made in a fundamental context,so that they are applicable to all areas involved with the production of sheet-metal forming and blanking dies.Timing cycle for a mass produced car body panelUntil the end of the 1980s some car models were still being produced for six to eight years more or less unchanged or in slightly modified form.Today,however,production time cycles are set for only five years or less(Fig.4.1.6).Following the new different model policy,the demands ondie makers have also changed prehensive contracts of much greater scope such as Simultaneous Engineering(SE)contracts are becoming increasingly common.As a result,the die maker is often involved at the initial development phase of the metal part as well as in the planning phase for the production process.Therefore,a much broader involvement is established well before the actual die development is initiated.Fig.4.1.6 Time schedule for a mass produced car body panelThe timetable of an SE projectWithin the context of the production process for car body panels,only a minimal amount of time is allocated to allow for the manufacture of the dies.With large scale dies there is a run-up period of about 10 months in which design and die try-out are included.In complex SE projects,which have to be completed in 1.5 to 2 years,parallel tasks must be carried out.Furthermore,additional resources must be provided before and after delivery of the dies.These short periods call for pre-cise planning,specific know-how,available capacity and the use of the latest technological and communications systems.The timetable shows the individual activities during the manufacturing of the dies for the production of the sheet metal parts(Fig.4.1.7).The time phases for large scale dies are more or less similar so that this timetable can be considered to be valid in general.Data record and part drawingThe data record and the part drawing serve as the basis for all subsequent processing steps.They describe all the details of the parts to be produced. The information given in theFig.4.1.7 Timetable for an SE projectpart drawing includes: part identification,part numbering,sheet metal thickness,sheet metal quality,tolerances of the finished part etc.(cf.Fig.4.7.17).To avoid the production of physical models(master patterns),the CAD data should describe the geometry of the part completely by means of line,surface or volume models.As a general rule,high quality surface data with a completely filleted and closed surface geometry must be made available to all the participants in a project as early as possible.Process plan and draw developmentThe process plan,which means the operational sequence to be followed in the production of the sheet metal component,is developed from the data record of the finished part(cf.Fig.4.1.1).Already at this point in time,various boundary conditions must be taken into account:the sheet metal material,the press to be used,transfer of the parts into the press,the transportation of scrap materials,the undercuts as well as thesliding pin installations and their adjustment.The draw development,i.e.the computer aided design and layout of the blank holder area of the part in the first forming stage–if need bealso the second stage–,requires a process planner with considerable experience(Fig.4.1.8).In order to recognize and avoid problems in areas which are difficult to draw,it is necessary to manufacture a physical analysis model of the draw development.With this model,theforming conditions of the drawn part can be reviewed and final modifications introduced,which are eventually incorporated into the data record(Fig.4.1.9).This process is being replaced to some extent by intelligent simulation methods,throughwhich the potential defects of the formed component can be predicted and analysed interactively on the computer display.Die designAfter release of the process plan and draw development and the press,the design of the die can be started.As a rule,at this stage,the standards and manufacturing specifications required by the client must be considered.Thus,it is possible to obtain a unified die design and to consider the particular requests of the customer related to warehousing of standard,replacement and wear parts.Many dies need to be designed so that they can be installed in different types of presses.Dies are frequently installed both in a production press as well as in two different separate back-up presses.In this context,the layout of the die clamping elements,pressure pins and scrap disposal channels on different presses must be taken into account.Furthermore,it must be noted that drawing dies working in a single-action press may be installed in a double-action press(cf.Sect.3.1.3 and Fig.4.1.16).Fig.4.1.8 CAD data record for a draw developmentIn the design and sizing of the die,it is particularly important to consider the freedom of movement of the gripper rail and the crossbar transfer elements(cf.Sect.4.1.6).These describe the relative movements between the components of the press transfer system and the die components during a complete press working stroke.The lifting movement of the press slide,the opening and closing movements of the gripper rails and the lengthwise movement of the whole transfer are all superimposed.The dies are designed so that collisions are avoided and a minimum clearance of about 20 mm is set between all the moving parts.4 金属板料的成形及冲裁4. 模具制造原理4.1.1模具的分类在金属成形的过程中，工件的几何形状完全或部分建立在模具几何形状的基础上的。

【毕业设计】冲压模具毕业设计外文翻译

【关键字】毕业设计冲压模具毕业设计外文翻译篇一：模具外文文献及翻译The mold designing and manufacturingThe mold is the manufacturing industry important craft foundation, in our country,the mold manufacture belongs to the special purpose equipment manufacturingindustry. China although very already starts to make the mold and the use mold, but long-term has not formed the industry. Straight stabs 0 centuries 80's later periods, the Chinese mold industry only then drives into the development speedway. Recent years, not only the state-owned mold enterprise had the very big development, the threeinvestments enterprise, the villages and towns (individual) the mold enterprise'sdevelopment also rapid quietly.Although the Chinese mold industrial development rapid, but compares with thedemand, obviously falls short of demand, its main gap concentrates precisely to,large-scale, is complex, the long life mold domain. As a result of in aspect and so on mold precision, life, manufacture cycle and productivity, China and the international average horizontal and the developed country still had a bigger disparity, therefore, needed massively to import the mold every year .The Chinese mold industry must continue to sharpen the productivity, from now on will have emphatically to the profession internal structure adjustment and thestate-of-art enhancement. The structure adjustment aspect, mainly is the enterprise structure to the specialized adjustment, the product structure to center the upscale mold development, to the import and export structure improvement, center theupscale automobile cover mold forming analysis and the structure improvement, the multi-purpose compound mold and the compound processing and the laser technology in the mold design manufacture application, the high-speed cutting, the superfinishing and polished the technology, the information direction develops .The recent years, the mold profession structure adjustment and the organizationalreform step enlarges, mainly displayed in, large-scale, precise, was complex, the long life, center the upscale mold and the mold standard letter development speed is higher than the common mold product; The plastic mold and the compression casting mold proportion increases; Specialized mold factory quantity and its productivity increase;"The three investments" and the private enterprise develops rapidly; The joint stock system transformation step speeds up and so on. Distributes from the area looked,take Zhejiang Delta and Yangtze River delta as central southeast coastal areadevelopment quickly to mid-west area, south development quickly to north. Atpresent develops quickest, the mold produces the most centralized province isGuangdong and Zhejiang, places such as Jiangsu, Shanghai, Anhui and Shandong also has a bigger development in recent years.Although our country mold total quantity had at present achieved the suitable scale, the mold level also has the very big enhancement, after but design manufacture horizontal overall rise and fall industry developed country and so on Yu De, America, date, France, Italy many. The current existence question and the disparity mainly display in following several aspects:(1) The total quantity falls short of demandDomestic mold assembling one rate only, about 70%. Low-grade mold, centerupscale mold assembling oneself rate only has 50% about.(2) the enterprise organizational structure, the product structure, the technical structure and the import and export structure does not gatherin our country mold production factory to be most is from the labor mold workshop which produces assembles oneself (branch factory), from produces assembles oneself the proportion to reach as high as about 60%, but the overseas mold ultra 70% is the commodity mold. The specialized mold factory mostly is "large and complete","small and entire" organization form, but overseas mostly is "small but", "is specially small and fine". Domestic large-scale, precise, complex, the long life mold accountsfor the total quantity proportion to be insufficient 30%, but overseas in 50% aboveXX years, ratio of the mold import and export is 3.7:1, the import and exportbalances the after net import volume to amount to 1.32 billion US dollars, is world mold net import quantity biggest country .(3) The mold product level greatly is lower than the international standardThe production cycle actually is higher than the international water broad productlevel low mainly to display in the mold precision, cavity aspect and so on surface roughness, life and structure.(4) Develops the ability badly, economic efficiency unsatisfactory our countrymold enterprise technical personnel proportion lowThe level is lower, also does not take the product development, and is frequent inthe passive position in the market. Our country each mold staff average year creation output value approximately, ten thousand US dollars, overseas mold industry developed country mostly 15 to10, 000 US dollars, some reach as high as 25 to10,000 US dollars, relative is our country quite part of molds enterprises also continuesto use the workshop type management with it, truly realizes the enterprise which the modernized enterprise manages fewTo create the above disparity the reason to be very many, the mold long-term hasnot obtained the value besides the history in as the product which should have, as well as the most state-owned enterprises mechanism cannot adapt the market economy, butalso has the following several reasons: .(1) Country to mold industry policy support dynamics also insufficientlyAlthough the country already was clear about has promulgated the mold profession industrial policy, but necessary policy few, carried out dynamics to be weak. Atpresent enjoyed the mold product increment duty enterprise nation 185; the majority enterprise still the tax burden is only overweight. The mold enterprise carries on the technological transformations introduction equipment to have to pay the considerable amount the tax money, affects the technology advancement, moreover privately operated enterprise loan extremely difficult.(2) Talented person serious insufficient, the scientific research development and the technical attack investment too urinemold profession is the technology, the fund, the work crowded industry, along withthe time progress and the technical development, grasps the talented person which and skilled utilizes the new technology exceptionally short, the high-quality mold fitterand the enterprise management talent extremely is also anxious. Because the mold enterprise benefit unsatisfactory and takes insufficiently the scientific research development and the technical attack, the scientific research unit and the universities, colleges and institutes eye stares at is creating income, causes the mold profession invests too few in the scientific research development and the technical attack aspect, causes the mold technological development step doe not to be big, progresses does not be quick.(3) The craft equipment level is low, also is not good, the using factor is low.Recent years ,our country engine bed profession progressed quickly, has been able to provide the quite complete precision work equipment, but compared with the overseas equipment, still had a bigger disparity. Although the domestic many enterprises have introduced many overseas advanced equipment, but the overall equipment level low are very more than the overseas many enterprises. As a result of aspect the and so on system and fund reason, introduces the equipment not necessary, the equipment and the appendix not necessary phenomenon are extremely common, the equipment utilization rate low question cannot obtain the comparatively properly solution for a long time .(4) Specialization, standardization, commercialized degree low, the cooperationabilityBecause receives "large and complete" "small and entire" the influence since long ago, mold specialization level low, the specialized labor division is not careful, the commercialized degree is low. At present domestic every year produces mold, commodity mold minister 40% about, other for from produce uses for oneself. Between the molds enterprise cooperates impeded, completes the comparativelylarge-scale mold complete task with difficulty. Mold standardization level low, mold standard letter use cave rare is low also to the mold quality, the cost has a more tremendous influence, specially has very tremendous influence.(5) To the mold manufacture cycle) the mold material and the mold correlationtechnology fallThe mold material performance, the quality and the variety question often canaffect the mold quality, the life and the cost, the domestically produced molding toolsteel and overseas imports the steel products to compare has a bigger disparity. Plastic, plate, equipment energy balance, also direct influence mold level enhancement.At present, our country economy still was at the high speed development phase, onthe international economical globalization development tendency is day by dayobvious, this has provided the good condition and the opportunity for the our countrymold industry high speed development. On the one hand, the domestic mold marketwill continue high speed to develop, on the other hand, the mold manufacture also gradually will shift as well as the transnational group to our country carries on themold purchase trend to our country extremely to be also obvious. Therefore, will takea broad view the future, international, the domestic mold market overall development tendency prospect will favor, estimated the Chinese mold will obtain the high speed development under the good market environment, our country not only can becomethe mold great nation, moreover certainly gradually will make the powerful nation tothe mold the ranks to make great strides forward. "15" period, the Chinese moldindustry level not only has the very big enhancement in the quantity and the archerytarget aspect, moreover the profession structure, the product level, the development innovation ability, enterprise's system and the mechanism as well as the technology advancement aspect also can obtain a bigger development .The mold technology has gathered the machinery, the electron, chemistry, optics,the material, the computer, the precise monitor and the information network and so on many disciplines, is a comprehensive nature multi-disciplinary systems engineering.The mold technology development tendency mainly is the mold product tolarger-scale, precise, more complex and a more economical direction develops, themold product technical content unceasingly enhances, the mold manufacture cycle unceasingly reduces, the mold production faces the information, is not having thechart, is fine, the automated direction develops, the mold enterprise to the technical integration, the equipment excellent, is producing approves the brand, themanagement information, the management internationalization direction develops.Mold profession in "十15" period needs to solve the key essential technologyshould be the mold information, the digitized technology and precise, ultra fine, high speed, the highly effective manufacture technology aspect breakthroughAlong with thenational economy total quantity and the industry product technologyunceasing development, all the various trades and occupations to the mold demandquantity more and more big, the specification more and more is also high.Although mold type many, but its development should be with emphasis both canmeet the massive needs, and has the comparatively high-tech content, specially atpresent domestic still could not be self-sufficient, needs the massive imports the moldand can represent the development direction large-scale, precise, is complex, the long篇二：冲压模具设计毕业设计开题报告题目：院系：专业：学生：学号：指导老师：毕业设计开题报告冲压工艺分析与弯曲冲孔模具的设计三峡大学机械与材料学院机械设计制造及其自动化三峡大学机械与材料学院冲压工艺分析与弯曲冲孔模具的设计开题报告一、课题的来源课题来源于生产实际，探讨冲压加工中较常见零件的工艺方法和结构设计。

冲压模具技术外文文献翻译中英文

外文文献翻译(含：英文原文及中文译文)英文原文Stamping technologyIntroductionIn the current fierce market competition, the product to market sooner or later is often the key to the success or failure. Mould is a product of high quality, high efficiency production tool, mold development cycle of the main part of the product development cycle. So the customer requirements for mold development cycle shorter, many customers put the mould delivery date in the first place, and then the quality and price. Therefore, how to ensure the quality, control the cost under the premise of processing mould is a problem worthy of serious consideration. Mold processing technology is an advanced manufacturing technology, has become an important development direction, in the aerospace, automotive, machinery and other industries widely used. Mold processing technology, can improve the comprehensive benefit and competitiveness of manufacturing industry. Research and establish mold process database, provide production enterprises urgently need to high speed cutting processing data, to the promotion of high-speed machining technology has very important significance. This article's main goal is to build a stamping die processing, mold manufacturing enterprises in theactual production combined cutting tool, workpiece and machine tool with the actual situation of enterprise itself accumulate to high speed cutting processing instance, process parameters and experience of high speed cutting database selectively to store data, not only can save a lot of manpower and material resources, financial resources, but also can guide the high speed machining production practice, to improve processing efficiency, reduce the tooling cost and obtain higher economic benefits.1. The concept, characteristics and application of stampingStamping is a pressure processing method that uses a mold installed on a press machine (mainly a press) to apply pressure to a material to cause it to separate or plastically deform, thereby obtaining a desired part (commonly referred to as a stamped or stamped part). Stamping is usually cold deformation processing of the material at room temperature, and the main use of sheet metal to form the required parts, it is also called cold stamping or sheet metal stamping. Stamping is one of the main methods of material pressure processing or plastic processing, and is affiliated with material forming engineering.The stamping die is called stamping die, or die. Dies are special tools for the batch processing of materials (metal or non-metallic) into the required stampings. Stamping is critical in stamping. There is no die that meets the requirements. Batch stamping production is difficult. Without advanced stamping, advanced stamping processes cannot be achieved.Stamping processes and dies, stamping equipment, and stamping materials constitute the three elements of stamping. Only when they are combined can stampings be obtained.Compared with other methods of mechanical processing and plastic processing, stamping processing has many unique advantages in both technical and economic aspects, and its main performance is as follows;(1) The stamping process has high production efficiency, easy operation, and easy realization of mechanization and automation. This is because stamping is accomplished by means of die and punching equipment. The number of strokes for ordinary presses can reach several tens of times per minute, and the high-speed pressure can reach hundreds or even thousands of times per minute, and each press stroke is You may get a punch.(2) Since the die ensures the dimensional and shape accuracy of the stamping part during stamping, and generally does not destroy the surface quality of the stamping part, the life of the die is generally longer, so the stamping quality is stable, the interc hangeability is good, and it has “the same” Characteristics.(3) Stamping can process parts with a wide range of sizes and shapes, such as stopwatches as small as clocks, as large as automobile longitudinal beams, coverings, etc., plus the cold deformation hardening effect of materials during stamping, the strength of stamping and Thestiffness is high.(4) Stamping generally does not generate scraps, material consumption is less, and no other heating equipment is required. Therefore, it is a material-saving and energy-saving processing method, and the cost of stamping parts is low.However, the molds used for stamping are generally specialized, and sometimes a complex part requires several sets of molds for forming, and the precision of the mold manufacturing is high and the technical requirements are high. It is a technology-intensive product. Therefore, the advantages of stamping can only be fully realized in the case of large production volume of stamping parts, so as to obtain better economic benefits.Stamping is widely used in modern industrial production, especially in mass production. A considerable number of industrial sectors are increasingly using punching to process product components such as automobiles, agricultural machinery, instruments, meters, electronics, aerospace, aerospace, home appliances, and light industry. In these industrial sectors, the proportion of stamped parts is quite large, at least 60% or more, and more than 90%. Many of the parts that were manufactured in the past using forging = casting and cutting processes are now mostly replaced by light-weight, rigid stampings. Therefore, it can be said that if the stamping process cannot be adopted in production, it isdifficult for many industrial departments to increase the production efficiency and product quality, reduce the production cost, and quickly replace the product.2. Basic process and mould for stampingDue to the wide variety of stamped parts and the different shapes, sizes, and precision requirements of various parts, the stamping process used in production is also varied. Summarized, can be divided into two major categories of separation processes and forming processes; Separation process is to make the blank along a certain contour line to obtain a certain shape, size and section quality stamping (commonly referred to as blanking parts) of the process; forming process refers to The process of producing a stamped part of a certain shape and size by plastic deformation of the blank without breaking.The above two types of processes can be divided into four basic processes: blanking, bending, deep drawing and forming according to different basic deformation modes. Each basic process also includes multiple single processes.In actual production, when the production volume of the stamped part is large, the size is small and the tolerance requirement is small, it is not economical or even difficult to achieve the requirement if the stamping is performed in a single process. At this time, a centralized scheme is mostly used in the process, that is, two or more singleprocesses are concentrated in a single mold. Different methods are called combinations, and they can be divided into compound-graded and compound- Progressive three combinations.Composite stamping - A combination of two or more different single steps at the same station on the die in one press stroke.Progressive stamping - a combination of two or more different single steps on a single work station in the same mold at a single working stroke on the press.Composite - Progressive - On a die combination process consisting of composite and progressive two ways.There are many types of die structure. According to the process nature, it can be divided into blanking die, bending die, drawing die and forming die, etc.; the combination of processes can be divided into single-step die, compound die and progressive die. However, regardless of the type of die, it can be regarded as consisting of two parts: the upper die and the lower die. The upper die is fixed on the press table or the backing plate and is a fixed part of the die. During work, the blanks are positioned on the lower die surface by positioning parts, and the press sliders push the upper die downwards. The blanks are separated or plastically deformed under the action of the die working parts (ie, punch and die) to obtain the required Shape and size of punching pieces. When the upper mold is lifted, the unloading and ejecting device of the moldremoves or pushes and ejects the punching or scrap from the male and female molds for the next punching cycle.3. Current status and development direction of stamping technologyWith the continuous advancement of science and technology and the rapid development of industrial production, many new technologies, new processes, new equipment, and new materials continue to emerge, thus contributing to the constant innovation and development of stamping technology. Its main performance and development direction are as follows:(1) The theory of stamping and the stamping process The study of stamping forming theory is the basis for improving stamping technology. At present, the research on the stamping forming theory at home and abroad attaches great importance, and significant progress has been made in the study of material stamping performance, stress and strain analysis in the stamping process, study of the sheet deformation law, and the interaction between the blank and the mold. . In particular, with the rapid development of computer technology and the further improvement of plastic deformation theory, computer simulation techniques for the plastic forming process have been applied at home and abroad in recent years, namely the use of finite element (FEM) and other valuable analytical methods to simulate the plastic forming process of metals. According to the analysis results, the designer can predict the feasibility and possiblequality problems of a certain process scheme. By selecting and modifying the relevant parameters on the computer, the process and mold design can be optimized. This saves the cost of expensive trials and shortens the cycle time.Research and promotion of various pressing technologies that can increase productivity and product quality, reduce costs, and expand the range of application of stamping processes are also one of the development directions of stamping technology. At present, new precision, high-efficiency, and economical stamping processes, such as precision stamping, soft mold forming, high energy high speed forming, and dieless multi-point forming, have emerged at home and abroad. Among them, precision blanking is an effective method for improving the quality of blanking parts. It expands the scope of stamping processing. The thickness of precision blanking parts can reach 25mm at present, and the precision can reach IT16~17; use liquid, rubber, polyurethane, etc. Flexible die or die soft die forming process can process materials that are difficult to process with ordinary processing methods and parts with complex shapes, have obvious economic effects under specific production conditions, and adopt energy-efficient forming methods such as explosion for processing. This kind of sheet metal parts with complex dimensions, complex shapes, small batches, high strength and high precision has important practical significance; Superplastic forming of metal materialscan be used to replace multiple common stampings with one forming. Forming process, which has outstanding advantages for machining complex shapes and large sheet metal parts; moldless multi-point forming process is an advanced technology for forming sheet metal surfaces by replacing the traditional mold with a group of height adjustable punches. Independently designed and manufactured an international leading-edge moldless multi-point forming equipment, which solves the multi-point press forming method and can therefore be Changing the state of stress and deformation path, improving the forming limit of the material, while repeatedly using the forming technology may eliminate the residual stress within the material, the rebound-free molding. The dieless multi-point forming system takes CAD/CAM/CAE technology as the main means to quickly and economically realize the automated forming of three-dimensional surfaces.(2) Dies are the basic conditions for achieving stamping production. In the design and manufacture of stampings, they are currently developing in the following two aspects: On the one hand, in order to meet the needs of high-volume, automatic, precision, safety and other large-volume modern production, stamping is To develop high-efficiency, high-precision, high-life, multi-station, and multi-function, compared with new mold materials and heat treatment technologies, various high-efficiency, precision, CNC automatic mold processing machine toolsand testing equipment and molds CAD/CAM technology is also rapidly developing; On the other hand, in order to meet the needs of product replacement and trial production or small-batch production, zinc-based alloy die, polyurethane rubber die, sheet die, steel die, combination die and other simple die And its manufacturing technology has also been rapidly developed.Precision, high-efficiency multi-station and multi-function progressive die and large-scale complex automotive panel die represent the technical level of modern die. At present, the precision of the progressive die above 50 stations can reach 2 microns. The multifunctional progressive die can not only complete the stamping process, but also complete welding, assembly and other processes. Our country has been able to design and manufacture its own precision up to the international level of 2 to 5 microns, precision 2 to 3 microns into the distance, the total life of 100 million. China's major automotive mold enterprises have been able to produce complete sets of car cover molds, and have basically reached the international level in terms of design and manufacturing methods and means. However, the manufacturing methods and methods have basically reached the international level. The mold structure and function are also close to international Level, but there is still a certain gap compared with foreign countries in terms of manufacturing quality, accuracy, manufacturing cycle and cost.4. Stamping standardization and professional productionThe standardization and professional production of molds has been widely recognized by the mold industry. Because the die is a single-piece, small-volume production, the die parts have both certain complexity and precision, as well as a certain structural typicality. Therefore, only the standardization of the die can be achieved, so that the production of the die and the die parts can be professionalized and commercialized, thereby reducing the cost of the die, improving the quality of the die and shortening the manufacturing cycle. At present, the standard production of molds in foreign advanced industrial countries has reached 70% to 80%. Mould factories only need to design and manufacture working parts, and most of the mold parts are purchased from standard parts factories, which greatly increases productivity. The more irregular the degree of specialization of the mold manufacturing plant, the more and more detailed division of labor, such as the current mold factory, mandrel factory, heat treatment plant, and even some mold factories only specialize in the manufacture of a certain type of product or die The bending die is more conducive to the improvement of the manufacturing level and the shortening of the manufacturing cycle. China's stamp standardization and specialized production have also witnessed considerable development in recent years. In addition to the increase in the number of standard parts specialized manufacturers, the number ofstandard parts has also expanded, and the accuracy has also improved. However, the overall situation can not meet the requirements of the development of the mold industry, mainly reflected in the standardization level is not high (usually below 40%), the standard parts of the species and specifications are less, most standard parts manufacturers did not form a large-scale production, standard parts There are still many problems with quality. In addition, the sales, supply, and service of standard parts production have yet to be further improved.中文译文冲压模具技术前言在目前激烈的市场竞争中, 产品投入市场的迟早往往是成败的关键。

冲压模具类外文文献翻译、中英文翻译、外文翻译

模具工业是国民经济的基础工业，是国际上公认的关键工业，工业发达国家称之为“工业之母”。

模具成型具有效率高，质量好，节省原材料，降低产品成本等优点。

采用模具制造产品零件已成为当今工业的重要工艺手段。

模具在机械，电子，轻工，纺织，航空，航天等工业领域里，已成为使用最广泛的工业化生产的主要工艺装备，它承担了这些工业领域中60%--80%产品零件，组件和部件的加工生产。

“模具就是产品质量”，“模具就是经济效益”的观念已被越来越多的人所认识和接受。

在中国，人们已经认识到模具在制造业中的重要基础地位，认识更新换代的速度，新产品的开发能力，进而决定企业的应变能力和市场竞争能力。

在目前用薄钢板制造发动机罩盖的传统还是会持续相当一段时间，所以有必要在钢板的基础上通过利用计算机软件的功能分析零件的工艺性能（结构合理，受力，是否容易冲出破面、、、），发现现有零件的不足之处，讨论并确定改进这些不足之处，进而改善模具的设计，改良冲裁方式；最终实现产品的改良，改善产品的力学性能，外观，使用效果，和造价等等。

冲压加工是通过模具来实现的，从模具角度来看，模具生产技术水平的高低，已成为衡量一个国家产品制造水平高低的重要标志，因为模具在很大程度上决定着产品的质量、效益和新产品的开发能力。

“模具是工业生产的基础工艺装备”也已经取得了共识。

据统计，在电子、汽车、电机、电器、仪器、仪表、家电和通信等产品中，60%～80%的零部件都要依靠模具成形。

用模具生产制件所具备的高精度、高复杂程度、高一致性、高生产率和低消耗，是其他加工制造方法所不能比拟的。

同时，冲压加工也创造了巨大的价值增值，模具是“效益放大器”，用模具生产的最终产品的价值，往往是模具自身价值的几十倍、上百倍。

目前全世界模具年产值约为600亿美元，日、美等工业发达国家的模具工业产值已超过机床工业，从1997年开始，我国模具工业产值也超过了机床工业产值。

其中冲压模具在所有模具（锻造模、压铸模、注塑模等）中，无论从数量、重量或者是从价值上都位居榜首。

冲压模具技术外文翻译含外文文献

序言在目前剧烈旳市场竞争中，产品投入市场旳迟早往往是成败旳关键。

模具是高质量、高效率旳产品生产工具，模具开发周期占整个产品开发周期旳重要部分。

因此客户对模具开发周期规定越来越短，不少客户把模具旳交货期放在第一位置，然后才是质量和价格。

因此，怎样在保证质量、控制成本旳前提下加工模具是值得认真考虑旳问题。

模具加工工艺是一项先进旳制造工艺，已成为重要发展方向，在航空航天、汽车、机械等各行业得到越来越广泛旳应用。

模具加工技术，可以提高制造业旳综合效益和竞争力。

研究和建立模具工艺数据库，为生产企业提供迫切需要旳高速切削加工数据，对推广高速切削加工技术具有非常重要旳意义。

本文旳重要目旳就是构建一种冲压模具工艺过程，将模具制造企业在实际生产中结合刀具、工件、机床与企业自身旳实际状况积累得高速切削加工实例、工艺参数和经验等数据有选择地存储到高速切削数据库中，不仅可以节省大量旳人力、物力、财力，并且可以指导高速加工生产实践，到达提高加工效率，减少刀具费用，获得更高旳经济效益。

1.冲压旳概念、特点及应用冲压是运用安装在冲压设备（重要是压力机）上旳模具对材料施加压力，使其产生分离或塑性变形，从而获得所需零件（俗称冲压或冲压件）旳一种压力加工措施。

冲压一般是在常温下对材料进行冷变形加工，且重要采用板料来加工成所需零件，因此也叫冷冲压或板料冲压。

冲压是材料压力加工或塑性加工旳重要措施之一，从属于材料成型工程术。

冲压所使用旳模具称为冲压模具，简称冲模。

冲模是将材料（金属或非金属）批量加工成所需冲件旳专用工具。

冲模在冲压中至关重要，没有符合规定旳冲模，批量冲压生产就难以进行；没有先进旳冲模，先进旳冲压工艺就无法实现。

冲压工艺与模具、冲压设备和冲压材料构成冲压加工旳三要素，只有它们互相结合才能得出冲压件。

与机械加工及塑性加工旳其他措施相比，冲压加工无论在技术方面还是经济方面都具有许多独特旳长处，重要体现如下；(1) 冲压加工旳生产效率高，且操作以便，易于实现机械化与自动化。

冲压模具外文翻译

Punching die has been widely used in industrial production.In the traditional industrial production,the worker work very hard,and there are too much work,so the efficiency is low.With the development of the science and technology nowadays,the use of punching die in the industial production gain more attention, and be used in the industrial production more andmore.Self-acting feed technology of punching die is also used in production, punching die could increase the efficience of production and could alleviate the work burden，so it has significant meaning in technologic progress and economic value.The article mainly discussed the classification,feature and the developmental direction of the pnnching technology. Elaborated the punching components formation principle, the basic dies structure and the rate process and the principle of design; and designed some conventional punching die:the die for big diameter three direction pipe which solved the problom of traditional machining,the drawing and punching compound die with float punch-matrix,the drawing and cutting compound dies with unaltered press,the compound die for the back bowl of the noise keeper,the design of the compound die which could produce two workpieces in one punching,the bending die for the ring shape part ,the bending die which used the gemel ,automate loading die for cutting, the drawing,punching and burring compound dies with sliding automated loading,the punching die for the long pipe with two row of hole,the drawing die for the square box shape workpiece and the burring die for the box shape workpiece.The punching dies that utilized the feature of the normal punch shaped the workpiece in the room temperature,and its efficiency and economic situation is excellent.The dies here discussed can be easily made,conveniently used, and safely operated.And it could be used as the reference in the large scale production of similar workpieces.CAD and CAM are widely applied in mould design and mould making. CAD allows you to draw a model on screen, then view it from every angle using 3-D animation and, finally, to test it by introducing various parameters into the digital simulation models(pressure, temperature, impact, etc.) CAM, on the other hand, allows you to control the manufacturing quality. The advantages of these computer technologies are legion: shorter design times(modifications can be made at the speed of the computer),lower cost, faster manufacturing, etc. This new approach also allows shorter production runs, and to makelast-minute changes to the mould for a particular part. Finally, also, these new processes can be used to make complex parts.Computer-Aided Design(CAD)of MouldTraditionally, the creation of drawings of mould tools has been atime-consuming task that is not part of the creative process. Drawings are an organizational necessity rather than a desired part of the process.Computer-Aided Design(CAD) means using the computer and peripheral devices to simplify and enhance the design process .CAD systems offer an efficient means of design, and can be used to create inspection programs when used in conjunction with coordinate measuring machines and other inspection equipment.CAD data also can play a critical role in selecting process sequence.A CAD system consists of three basic components: hardware, software, users. The hardware components of a typical CAD system include a processor, a system display, a keyboard, a digitizer, and a plotter. The software component of a CAD system consists of the programs which allow it to perform design and drafting functions. The user is the tool designer who uses the hardware and software to perform the design process.Based on the 3-D data of the product, the core and cavity have to be designed first. Usually the designer begins with a preliminary part design, which means the work around the core and the cavity could change. Modern CAD systems can support this with calculating a split line for a defined draft direction, splitting the part in the core and cavity side and generating therun-off or shut-off surfaces. After the calculation of the optimal draft of the part, the position and direction of the cavity, slides and inserts have to bedefined .Then in the conceptual stage, the positions and the geometry of the mould components---such as slides, ejection system, etc.----are roughly defined. With this information, the size and thickness of the plates can be defined and the corresponding standard mould can be chosen from the standard catalog. If no standard mould fits these needs, the standard mould that comes nearest to the requirements is chosen and changedaccordingly---by adjusting the constraints and parameters so that any number of plates with any size can be used in the mould. Detailing the functional components and adding the standard components complete themould(Fig.23.1).This all happens in 3-D. Moreover, the mould system provides functions for the checking, modifying and detailing of the part .Already in this early stage, drawings and bill of materials can be created automatically. Through the use of 3-D and the intelligence of the mould design system, typical 2-D mistakes---such as a collision between cooling andcomponents/cavities or the wrong position of a hole---can be eliminated at the beginning. At any stage a bill of materials and drawings can becreated---allowing the material to be ordered on time and always having an actual document to discuss with the customer or a bid for a mould base manufacturer.The use of a special 3-D mould design system can shorten development cycles, improve mould quality, enhance teamwork and free the designer from tedious routine work. The economical success, however, is highly dependentupon the organization of the workflow. The development cycles can be shortened only when organizational and personnel measures are taken. The part design, mould design, electric design and mould manufacturing departments have no consistently work together in a tight relationship. Computer-Aided Manufacturing(CAM)of MouldOne way to reduce the cost of manufacturing and reduce lead-time is by setting up a manufacturing system that uses equipment and personnel to their fullest potential. The foundation for this type of manufacturing system is the use of CAD data to help in making key process decisions that ultimately improve machining precision and reduce non-productive time. This is called as computer -aided manufacturing (CAM).The objective of CAM is to produce, if possible, sections of a mould without intermediate steps by initiating machining operations from the computer workstation.With a good CAM system , automation does not just occur within individual features. Automation of machining processes also occurs between all of the features that make up a part, resulting in tool-path optimization. As you create features ,the CAM system constructs a process plan for you .Operations are ordered based on a system analysis to reduce tool changes and the number of tools used.On the CAM side, the trend is toward newer technologies and processes such as milling to support the manufacturing of high-precision injection moulds with 3-D structures and high surface qualities. CAM software will continue to add to the depth and breadth of the machining intelligence inherent in the software until the CNC programming process becomes completely automatic. This is especially true for advanced multifunction machine tools that require a more flexible combination of machining operations. CAM software will continue to automate more and more of manufacturing's redundant work that can be handled faster and more accurately by computers , while retaining the control that machinists need.With the emphasis in the mould making industry today on producing moulds in the most efficient manner while still maintaining quality, moludmakers need to keep up with the latest software technologies-packages that will allow them to program and cut complex moulds quickly so that mould production time can be reduced. In a nutshell, the industry is moving toward improving the quality of data exchange between CAD and CAM as well as CAM to the CNC, and CAM software is becoming more "intelligent" as it relates to machining processes_resulting in reduction in both cycle time and overall machining time. Five-axis machining also is emerging as a "must-have" on the shop floor-especially when dealing with deep cavities.And with the introduction of electronic data processing(EDP)into the mould making industry, new opportunities have arisenin mould-making to shorten production time, improve cost efficiencies and higher quality.冲压模具已广泛应用于工业，在传统的工业生产，工人工作很辛苦，有太多的工作，所以效率是很低.在科学和技术的今天，使用的冲压模具开发在实业生产获得更多的关注，并在工业生产中越来越被关注.冲压模具用饲料技术也可用于生产，冲压模具可提高生产的有效性，可以减轻工作负担，因此在科技进步和经济价值具有重要意义。

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外文翻译汽车后底板的冲压模具设计分析Fuh－kuo Chen，Jia－Hong Liu台湾国立大学机械工程系，台北，台湾1994年10月10日接收摘要本文研究了客车后底板的冲压制造过程。

使用圆栅格分析和3-D有限元方法，对产生拉深开裂缺陷的最初的冲模设计进行了分析。

开裂缺陷是由于压边圈下大范围的金属限制了向杯状区域的流动。

优化的冲模设计，包括一个分离的冲模面和一个楔形机构组成的凹模结构，目的是在不添加工序的情况下，向杯状区域提供额外金属、消除开裂缺陷。

这种优化的冲模设计在第一次和第二次拉深的圆栅格分析结果中得到验证，获得了合格的拉深面板。

自Keeler和Backofen在1963年第一次引入成型极限图（FLDS），在冲压车间里它们就已经被广泛的使用在金属的结构分析中。

在目前的研究中，优化的模具设计，包括一个分离的冲模面和一个楔形机构组成的凹模结构，目的是为了消除发生在客车面板冲压过程中的开裂缺陷。

这种特殊的模具面和楔形结构能为发生开裂缺陷的危险区域提供额外的金属，而不增加额外的工序。

圆栅格分析和3-D有限元仿真能够完成开裂缺陷分析的任务。

2.问题描述客车后面板的设计通常是由两块冲压板焊合在一起，如图1所示。

之所以选择两块板设计是由于开裂往往是发生在拉深成杯状的壁上，使得冲压一块后底板很困难，如图2所示。

开裂的发生是由于在杯壁和压边圈之间有一段距离，如图3中A-B处，这限制了压边圈下的金属流入杯状区域，同时两块板的距离很短，有足够的金属能够轻易地流入杯中从而阻止杯缘的开裂，由于成本的考虑，一块后底板容易得到，因此开裂问题必须被攻克。

为了在冲压车间生产出一块后底板，最初的程序包括四步：拉深，再次拉深，清理焊缝，翻边。

第一次拉深操作仅仅能够产生杯状外形，如图3所示。

就杯子周围的肋板来说，这是在第二次拉深操作中形成的。

像大多数冲压过程一样，后底板的主要变形是在第一次拉深操作中完成的。

这种传统的拉深过程容许冲床从压边圈中拉出更多的金属到模腔中。

为了促进金属的流动，未被拉深的焊料贴在压边圈的表面。

然而，由于拉深很深和以上提及的几何学上的难点，在第一次拉深操作后开裂仍在靠近杯壁的底部被发现，如图2所示。

开裂缺陷的位置表明，在杯壁的一侧和压边圈之间有相当大的距离，这阻止了金属向杯状区域流动。

为了减少压边圈的应力，已经做的努力是帮助金属向杯状区域流动，但这致使在杯状区域底部出现更多起皱，也没有消除开裂，而改善薄金属的质量也被证明是徒劳的。

改变润滑条件能减弱开裂问题，然而这对大规模的生产并不节省成本。

同时大量的润滑油被用在冲压生产中可能会污染了车间。

因此更有效的方式是解决冲压形成杯状之前向杯状区提供更多金属的问题。

为了达到这个目的，改变压边圈表面的形状以便向杯状区域提供更多的金属。

然而由于同样的几何学原因，在杯与压边圈一侧有相当大的距离，优化的压边圈不容易获得。

最后，为第一次半自动拉深设计的分模面是通过特殊楔形机构安装在凹模里，它能为杯状区域提供更多的金属，并且激发了没有开裂缺陷产品的生产。

3.最初设计的分析开裂问题通常与危险区域的应力分布有关，在任何横截面的成形部分中，应力分布是由两方面决定的：一个是由金属流入压边圈的上方进行拉深而造成的，另一个是由冲床和模具之间接触所造成的延伸总量决定的。

为了在金属流动中考察几何学的效果，最初的设计是通过圆栅格分析CGA和有限元方法分析FEM。

3．1圆栅格分析圆栅格分析已被广泛用于冲压车间的测量应力分布当中，因此能够通过测绘成型极限图的有规则的应力来分析金属片的可冲压性。

圆栅格比其他类型的栅格例如方形栅格有主要的优势，因为它们没有任何的方向性，这种优势在于圆变形后会成为椭圆。

这两个主要的方向清晰地通过长轴与短轴展示出来。

通过在成型极限图上测量长轴与短轴的长度得出主张力的大小，就能够估计成形部分的区域。

在目前的研究中，底板的生产利用原来的模具设计，第一次使用圆栅格分析，生产厚0.7mm，DDQ品质的钢，如图4所示那样的材料，钢的供应者提供材料相应的成型极限图在图5中展示。

靠近这个弯曲面的残余应力使这个区域有开裂的趋势。

实际上成型极限弯曲如图在5中虚线所示，被移下来的10%作为设计弯曲。

在成型极限弯曲之上的区域被称作故障区域，在成型极限弯曲和设计弯曲之间的区域被称为边缘区域，在设计弯曲以下的区域被指定为安全区域。

一般来说，为了冲压过程的稳定，任何成形部分的应力分布应该下降到安全区域。

冲压过程稳定是指对过程变化不敏感。

冲压之前模腔的危险区域被圆心间相距6mm，直径5mm的圆所标记。

为了标记模腔危险区域的圆，首先要使用一个特殊的清洁工具清洁，然后，有正确栅格的模板被放置在零件上，使用电解质作为指挥者，被模板覆盖的区域以栅格模式被标记。

为了阻止标记区域生锈，用一块湿清洁布把在标记中多余部分的电解质和残留的氧化物擦干净。

标记之后，开裂在杯壁靠近杯顶处被发现，如图2所示。

在裂缝周围不成形圆的主要和次要的应力如图6所示。

在成型极限图上的测量和规划如图7所示。

从图中可看出有规则的张力紧挨着成型极限曲线，因为主要和次要的应力是正应力，衰退是由延伸而造成的，所以应力非常接近水平应力方式，即接近次要应力为零的轴。

圆栅格分析的结果表明，原来的设计是非常不稳定的。

FLD也表明主要拉力太大，这是和目前作者的意见，即认为杯与压边圈之间的距离限制了金属向杯状区域流动这一结论是一致的，结果产生了大的拉力。

在前一部分讨论中最有效的减小主要拉力的方法是向杯状区域提供更多的金属。

3.2有限元分析为了帮助进一步了解冲压过程中毛坯的变形，3-D有限元分析完成最初设计的第一次拉深操作的任务。

明确了有限元是能够把任何3-D模具形状的PAM-STAMP 译成密码。

从3-D模具几何学起，只有冲床、模腔、压边圈未被简化，有限元程序能更准确模仿真实生产过程。

为了描述模具成分的几何学，一个商业的CAD软件被用来构造这些成分的表面模型。

网孔系统要求把PAM-STAMP作为几何学模具的输入数据，通过商业的CAD系统产生，如图8所示。

在早些时期，简单的3-D模型产生网孔系统是非常困难的，例如冲压模。

然而CAD系统被越来越多地用在模具和模具工业中。

上述为模具几何学产生网孔系统的程序变得容易起来。

自PAM-STAMP代码把模具成分当作其坚硬外壳以来，网孔系统仅仅被用来描述这些成分的几何学，而不是对应力进行分析。

在目前的调查中，3节点三角形和四节点矩形的原理被用来建造网孔系统，毛坯的网孔系统如图8所示。

从图中可以看出网孔密度在杯状区域比在其它地方高得多，因为杯状区域是开裂发生的位置。

许多在分析时使用的原理被总结如下：模具：9910，冲床：5499，压边圈：4411，薄片：4891，总计24711。

有限元的物质条件同前一部分一样，其他的操作条件是：压边圈的张力57KPa，冲床速度10m/s，冲击行程895mm，摩擦力系数0.12，在一台SGI工作站上展示仿真结果，一台HP735工作站单独工作CPU需花费的时间是11100秒。

4.改进的模具设计开裂缺陷导致杯状周围的金属缺少，为了让更多的金属流向杯状，要改变杯状一侧的压边圈，如图12所示。

模具和压边圈的几何学仍与原来设计的一样，因此未被在图12中展示。

为了使这种修改有效，3-D有限元仿真完成代替重修模具的任务。

除了冲床和压边圈的几何学被改变以外，仿真条件与原来的设计是一样的，如图12所示。

整块板从有限元仿真为修改模具设计而得到主要和次要的应力分布，如图13所示。

从图中看出，由于大量的金属从不受限制的区域流向杯状，应力分布往下移了一点，但仍在边缘处。

图14展示了畸形的形状，观察到在不受限制的区域内有严重的起皱。

虽然在改进的设计中开裂问题可能避免，但严重的起皱是不能接受的。

因此，通过3－D有限元分析改进技术并不可行。

5.优化的模具设计正如前面部分所述，在生产面板中消除开裂缺陷的最有效的方法是为杯状区域提供更多的金属，为了达到这个目的已经作出了多次尝试，下面描述的模具设计已经被证明是可行和有效的。

在冲压车间，后底板通过两根氮柱为压边圈的单一冲压动作提供力量，为了在不增加额外工序的情况下向杯状区域提供更多的金属，凹模的形状被分为两部分，如图15所示。

模具形状的中间部分被楔形机构推动，并能够与固定的凹模进行相对的上下运动。

为了消除开裂缺陷设计改进的模具形状，活动部分的位置选择在杯状区域。

当压边圈关闭时，活动部分通过楔形机构向上驱动，把毛坯提高到一个特殊的高度。

当它在模具关闭过程期间与顶模接触时，倘若与原来的设计相比杯状区域有更多的金属，活动部分就被迫向下移动。

在模具关闭时，活动部分重新回到它的位置，加工成型完好部分。

6、结论为了使优化的模具设计有效，在上述相应计算基础上改进凹模结构。

结果，在试验期间使用改进的模具获得了优质量的后底板。

为了评估质量，圆栅格分析被又一次应用到成形过程中，与原来设计一样，圆被标记在同样的区域，开裂经常发生的杯壁周围，主要和次要应力被标注在成型极限图中，如图16所示。

从图中可看出，所有的标准应力在安全区域，其显示出用改进模具进行第一次拉深操作是非常稳定的，它对于处理变化并不敏感。

为了使它更完整，圆栅格分析也同样完成第二次拉深操作的任务。

除了在面板内形成肋骨之外，如图1所示，第二次拉深操作还在杯顶加大圆角半径。

因此，第二次拉深将有点拉长杯状区域。

在第一次拉深和第二次拉深中，测量杯状区域主要和次要应力在图17中展示。

在图17中很清楚的表明第二次拉深时拉力要大，尽管几个应力是在边缘区域，但大部分应力仍在安全区域。

因落入边缘区域的点数少并且它们的应力仍然接近设计弯曲，第二次拉深操作仍被认为是稳定的，至于第三次和以后的操作，只不过是修整和简单翻边操作。

因此，这两项操作不能够引起进一步的变形，也不需要分析。

译文原文出处：Journal of Materials Processing Technology 55 (1995) 408-416。