《机电专业英语》PPT课件
机电专业英语PPT课件
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例句:They made an immense improvement in English.
在E英nd语方面他们取得了巨大的进步To。pic Above Next
centrifugal [sen‘trifjugəl] adj.离心的
mass-produced大(批)量生产的
Section II Text
Processes of mechanization have been developing and becoming more complex ev er since the beginning of the Industrial Revo lution at the end of the 18th century.(自从 18世纪末工业革命开始,工业机械化进 程一直在不断地发展,并且变得越来越 复杂。) The current developments of auto matic processes are, however, different from the old ones.(但目前的工业自动化过程 较以前的工业自动化过程有很大的不同)
)
Now people often talk about “feedback” as b
eing an essential factor of the new industrial t
echniques, upon which is based an automatic
self-regulating system and by virtue of which
And in many, though not all, instances th e element of control is so great that me chanization displaces muscle, “automat ion” displaces brain as well.(尽管不 是所有的情况,但在大多数情况下, 控制元件依然发挥着强大的力量, 机械化已经代替了手工劳动,而自 动化代替了脑力劳动。
机电专业英语课件Lesson 1
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Topic
Above
汉
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Section II Text
Early in the 1950s, two important engineering discoveries changed th e image of the electronic-computer field. These discoveries were the mag netic core memory and Transistor-Circuit Element. These technical disco veries quickly found their way into new models of digital computers. In the 1960s, efforts to design and develop the fastest possible compu ter with the greatest capacity reached a turning point with the LARC mac hine. The LARC had a base memory of 98000 words and multiplied in 1 0 μs. The trend during the 1970s was, to some extent, moving away from ve ry powerful, single-purpose computers and toward a larger range of appli cations for cheaper computer systems. Most continuous-process manufac turing, such as petroleum refining and electrical-power distribution syste ms then used computers of smaller capability for controlling and regulati ng their jobs.
Unit 18 Fluid and Hydraulic System 机电专业英语 图文课件
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New Words & Expressions
stimulate ['stimjuleit] v. 促进,激励 hydraulics [hai'drɔ:liks] n. 水力学,液压系统 resilience [ri'ziliəns] n. 跳回,恢复力,回弹 virtue ['və:tʃu:] n. 优点,效力,功能 detriment ['detrimənt] n. 损害,不利 regrind [ri:'graind] v. 重磨
Text & Translation
The domestication of grain began some 5 000 years before and some enterprising farmers may have become tired of pounding or grinding the grain by hand. Perhaps,in fact,the inventors were some farmers wives. Since they often drew the heavy jobs.
New Words & Expressions
layer ['leiə] n. 层,层次 tangential [tæn'dʒenʃəl] adj. 切线的,切向的 Newtonian [ˌnjuːˈtəʊniən] adj. 牛顿的,牛顿学说的 nonlinear [nʌn'liniə] adj. 非线性的,非直线的 rotational [rəu'teiʃənl] adj. 旋转的,转动的,循环的 compressible [kəm'presibl] adj. 可压缩的,可压榨的 Pascal’s law 帕斯卡定律 pressurize ['preʃəraiz] v. 增压,给……加压
《机电专业英语》 教学课件课件 Unit 24 Flexible Manufacturing
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1. Computer control. 2. Automated materials handling capability. 3. Tool handling capability.
Text & Translation
Flexible manufacturing was first introduced in the mid-1960s when the British firm Moils Ltd. developed its System 24. System 24 is a real FMS. However, it was doomed from the outset because automation, integration, and computer control technology had not yet been developed to the point where they could properly support the system. With the emergence of sophisticated computer control technology in the late 1970s and 1980s, flexible manufacturing became a viable concept. In the United States, manufacturers of automobiles, trucks, and tractors are the pioneers in adopting flexible manufacturing.
Unit11FundamentalsofMaterialForming机电专业英语图文课件
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Text & Translation
Group III—Separating. Machining or removal of material,that is,destroying cohesion.
Group IV—Joining. Uniting of individual workpieces to form filling subassemblies,filling and impregnating of workpieces,and so on,that is, increasing cohesion between several workpieces.
Text & Translation
2. Principles of Plastic Forming Plasticity theory is the foundation for the numerical
treatment of metal forming processes. Materials science and metallurgy can explain the origins of the plastic state of metallic bodies and its dependence on various parameters,such as process speed,prior history,temperature. The essentially older plasticity theory deals with the calculation of stresses,forces,and deformation.
阻止 substrate ['sʌbstreit] n. (=substratum) 底层,下层,(地)底土
《机电专业英语》 教学课件课件 Unit 15 Mechatronics
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Text & Translation
Mechatronics is an integrated comprehensive study of intelligent and high performance electromechanical system (mechanisms and processes),intelligent and motion control through the use of advanced microprocessors and DSPs,power electronics and ICs,design and optimization,modeling and simulation,analysis and virtual prototyping,etc. Integrated multidisciplinary features are approaching quickly,and mechatronics,which integrates electrical, mechanical,and computer engineering areas(Fig.15.1).
New Words & Expressions
benchmark [′bentʃma:k] n. 基准,标准 entreaty [in′tri:ti] n. 恳求,请求 evolutionary [i:və′lu:ʃnəri] adj. 发展的,演化的 DSP (digital signal processing) 数字信号处理 IC (integrated circuit) 集成电路 consensus [kən′sensəs] n. 一致 augment [ɔ:g′ment] v. 增加,扩大 unify [′ju:nifai] v. 成为一体,统一 cornerstone [′kɔ:nəstəun] n. 基石,基础
Unit 7 Lathes 机电专业英语 图文课件
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Text & Translation
3.Turret Lathes When machining a complex workpiece on a general purpose
lathe,a great deal of time will be spent in changing or adjusting the tools needed. [2]One of the first adaptations of the engine lathe which made it more suitable to mass production was the addition of multi tool turret in place of the tailstock. Although most turrets have six stations,some have as many as eight. High production turret lathes are very complicated with many power accessories. The principal feature of all turret lathes, however,is that they can perform a consecutive serial of operations in proper sequence. Once the tools have been set and adjusted,little skill is required to turn out duplicate parts.
New Words & Expressions
forging ['fɔ:dʒiŋ] n. 锻造;锻件 bar stock 棒料 collet ['kɔlit] n. 夹头 attachment [ə'tætʃmənt] n. 附件 spindle ['spindl] n. 主轴 reversal [ri'və:səl] n. 反转;逆转 vertical ['və:tikəl] adj. 立式的;垂直的 machine center 加工中心
机电专业英语ppt
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Chapter One Lesson One
Mechanics Components
Gears
Spur and helical gears.
A gear having tooth elements that are straight and parallel to its axis is known as a spur gear. A spur pair can be used to connect parallel shafts only. Parallel shafts, however, can also be connected by gears of another type, and a spur gear can be mated with a gear of a different type (Fig. 1-1).
The thrust problem can be overcome by cutting two sets of opposed helical teeth on the same blank. Depending on the method of manufacture, the gear may be of the continuous-tooth herringbone variety or a double-helical gear with a space between the two halves to permit the cutting tool to run out. Doublehelical gears are well suited for the efficient transmission of power at high speeds.
Unit 2 Some Rules for Mechanical Design 机电专业英语 图文课件
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Text & Translation
The following tips may be helpful in stimulating creative ideas of the designers.
(1)Apply ingenuity to utilize desired physical properties and to limit undesired ones. [3]The performance requirements of a machine are met by utilizing laws of nature or properties of matter (e.g., flexibility,strength,gravity,inertia,buoyancy,centrifugal force, principles of the lever and inclined plane,friction,viscosity,fluid pressure,and thermal expansion),also the many electrical,optical, thermal,and chemical phenomena. However,what may be useful in one application may be detrimental in the next. For example,flexibility is desirable in valve springs but not in the valve camshaft;friction is desirable at the clutch face but not in the clutch bearing. Ingenuity in design should be applied to utilize and control the physical properties that are desirable and to minimize those that are not desirable.
Unit-19-Hydraulic-Basic-Circuits-机电专业英语-图文课件
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放 regenerative [ri'dʒenəreitiv] adj. 再生的, 新生的 torque [tɔ:k] n. 转矩,力矩,扭矩 lubricator ['lu:brikeitə] n. 润滑剂, 加油器 modification [͵mɔdifi'keiʃən] n. 改装, 修订, 更改 customize ['kʌstəmaiz] v. 定制; 定做; 自定义 neutral ['nju:trəl] adj. 中立的, 中性的; 不确定的 n. 中
位 psi (pound per square inch) 气压单位(1 psi=6.89
kPa)
New Words & Expressions
cylinder ['silində] n. 气筒; 液压缸, 气缸 welder ['weldə] n. 焊工; 电焊机 parallel ['pærəlel] n. 平行, 平行线 solenoid ['səulinɔid] n. 螺线管 energize ['enədʒaiz] v. 给与…能量、电压, 使活跃 actuate ['æ ktjueit] v. 开动(机器), 驱动 compensate ['kɔmpenseit] v. 补偿, 赔偿 traverse ['trævə:s] v. 横越, 转动, 在轴上旋转 momentarily ['məumən͵terili] adv. 短暂地, 临时地 initiate [i'niʃieit] v. 开始; 创始
教学课件:《新核心高职行业英语——机电英语》
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Part IV Task-driven Practice
Task Description The whole task is divided into three steps. Step 1 is about briefly introducing yourself, your unique strength and problems. Step 2 centers on talking about your major and related work skills and capabilities. Step 3 is to describe your future job you’re expecting and how to achieve it.
Part IV Task-driven Practice
Expressions used for giving a presentation. Read aloud and try to memorize & use some.
◆Getting people’s attention ① May I have your attention, please? ② Good morning/afternoon, everyone! I’m …from… ③ Ladies and gentlemen, attention please!
——Product Inspection & Certification
❖Unit 7 Have You Ever Heard of G-Marketing?
——Product Advertising & Marketing
❖Unit 8 How Do You Transport Your Goods?
机电专业英语讲义.ppt.Convertor
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机电专业英语复习资料一 1.1 Bipolar junction transistorsToday, industrial electronic systems employseveral devices that are described by the term transistor. Each type of transistor has different characteristics and operational conditions that are used to distinguish it from others.每种晶体管都有区别于其它种类的特征和工作环境。
In the first part of this discussion, we are concerned with the . Structurally, this transistor is described as bipolar because it has two different current-carrier polarities.首先探讨双极型晶体管。
从结构上看,这种晶体管被称为双极是因为它具有两种不同的电流载流子电极。
Holes are positive current carriers, whereas electrons are negative current carriers.空穴是正的载流子,电子是负的电流载流子。
Two distinct kinds of semiconductor crystals are connected together by a common element. 两种截然不同的半导体晶体通过公共元件连接在一起。
The structure of this device is similar to that of two diodes connected back to back, with one crystal being common to both junctions. The center material is usually made thinner than the two outside pieces. 该器件的结构类似于背靠背连接的两个二极管的结构,一个晶体同时属于两个结。
机电一体化专业英语PPT
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Unit 1
Passage A
Center Drills (中心钻) Center drills are stiff, stubby little drills used to start holes in the end of work-piece. If you try to drill a hole in a work-piece without using a center drill,you will find that the drill will most likely wobble off center and not drill straight into the work-piece. Standard drilling practice is to first make a facing cut on the end of the work-piece, then drill a starter hole using a center drill and then drill the hole to the required depth with a standard drill.
Unit-9-Machining-Center-机电专业英语-图文课件
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Text & Translation
Two new trends are observed in the development of machining centers. One is the growing interest in smaller,more compact machining centers and the other is the emphasis on extended shift or even unmanned operations. Modern machining centers have contributed significantly to improved productivity in many companies. They have eliminated the time lost in moving workpieces from machine to machine and the time needed for workpiece loading and unloading for separate operations. In addition,they have minimized the time lost in changing tools,carrying out gauging operations,and aligning workpieces on the machine.
Text & Translation
加工中心有两个发展趋势:一是更小、更紧凑 的加工中心的兴起;二是对扩展轴或无人操作 的重视。现代的加工中心对很多公司提高生产 率有着重要的作用,节省了把工件从一台机床 移向另一台机床与对工件的单个加工所需的装 卸时间。此外,更换刀具、测量和工件定位的 时间也缩短至最低限度。
机电专业英语第Unit PPT课件
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• The open—loop control system does not provide positioning feedback to the control unit.
• The closed—loop control system is very accurate. It has an automatic compensative function for error, since the feedback device indicates the error and the control makes the necessary adjustments to bring the slide back to the position. They apply AC, DC or hydraulic servomotors.
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• Text • 4. Tool changers— In a common machining, several different cutting
tools are used to produce a part. The tools must be replaced quickly for the next machining operation. For this reason, the majority of NC/CNC machine tools are equipped with automatic tool changers, such as magazines on machine center and turrets on turning centers. They allow tool changing without the intervention of the operator.
机电专业英语
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机电专业英语 高职高专 ppt 课件
[3] The more carbon the steel contains and the quicker the cooling is, the harder it becomes. 钢的含碳量越高,冷速越快,钢就变得越硬。 [4] ...because the alloying elements make them tougher,stronger or harder than carbon stainless steels. 因为合金元素能提高钢的韧性,强度和硬度(与碳钢比较)。 有些合金元素能提高钢的耐腐蚀性,这种钢称为不锈钢。 句中的“make”和“cause”均为及物动词,它们的宾语分别为 “them”和“steel”。作为宾语“them”的补足语是形容比较 级“tougher,stronger or harder”,而宾语“steel”的补足 语是不定式短语“to resist corrosion”。“stainless steels” 作主语“such steel”的补充语。
机电专业英语 高职高专 ppt 课件
2.Alloy steels (1) Special alloy steel,such as nickel, chromium steel. (2) High-speed steel also known as self-hardening steel.
机电专业英语 高职高专 ppt 课件
书名:机电专业英语 ISBN: 978-7-111-34794-1 作者:周美蓉 出版社:机械工业出版社 本书配有电子课件
机电专业英语 高职高专 ppt 课件
Part Ⅱ Machining Operation
Unit Unit Unit Unit Unit Unit 4 5 6 7 8 9
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Topic Above Next
• pneumatic [nju:mæ tik] adj.空气的,气动的 例句:This pneumatic tool will double the
speed of assembly.
这个气动工具可以把装配速度提高一倍。 Knowledge of hydraulic, pneumatic and
mass-produced大(批)量生产的
Section I Words and Phrases
• mechanization [,mekənai'zeiʃən] n.机械化 例句:We are speeding up the mechanization of our agriculture.
我们正在加快农业机械化的步伐。
automation [,ɔ:tə‘meiʃən] n.自动化 • in as much as 因为,由于,鉴于,既然
这些机器人能辨别形状。
• feedback [ fi:dbæ k] n.反馈,回馈 • • negative feedback 负反馈 • deviation [di:vi:eiʃən] n.偏差,偏移,背离
例句:Any deviation from the party’s faith is seen as betrayal.
centrifugal force 离心力 centrifugal governor离 心式调速器
shaft [ʃɑ:ft] n. [C]轴;矿井;竖井 • valve [væ lv] n. n. [c]1. 阀,活门 2. 真空管,电子
管 • innumerable [i‘nju:mərəbl] adj.无数的;数不清的
任何对党的信仰的偏离被视作背叛。 • betrayal [bi'treiəl] n. 1. 背叛;密告;泄密2. 引诱 • spinning [spini] adj.旋转的 n.纺线,纺纱
例句:Spinning is one of my hobbies.我很喜欢纺纱。 • 单词来源:spin [spin] vt. & vi 使…旋转,杜撰,纺线,
electronic fixture applications. 具备运用液压、气动和电子器具的知识。 pneumatic cylinder 气缸 pneumatic actuator
气动执行元件
Section I Words and Phrases
• hydraulic [hai‘drɔ:lik] adj.液压的 例句:Hydraulic jacks under the machine produce the movement. 是机器下面的液压千斤顶造成的移动。 hydraulic engineering 水利工程 hydraulic drive 液压 传动hydraulic transmission system
秀的;卓越的
Section I Words and Phrases
• old-fashioned [əuld fæʃənd] adj.老式的,旧的 例句:An old-fashioned, fussy person.
老古板思想过时、吹毛求疵的人 fussy ['fʌsi] adj.大惊小怪的;难以取悦的;挑剔的 His values seem old-fashioned.
例句:In as much as the debtor has no property , I abandoned the claim.
因为债务人无财产,我放弃了债务。 debtor [‘detə] n. 借方,债务人
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Topic Above Next
They bought in as much food as would last the winter.
液压传动系统 • remarkable [rimɑ:kəbl]adj.显著的,非凡的,值得注
意的 • remarkable achievements • 卓越的成就
例句: Remarkable quality has good prestige .
卓越End的品质便有良好的信誉。 presTtoipgice [prAebso'vtie:ʒ] nN.e名xt 望,声 望,威望
• displace [displeis] vt.移置,取代,转移 • 过去式:displaced 过去分词:displaced 现在分
词:displacing 例句:He was displaced by another young man.
他已被另一个年轻人顶替。 The war has displaced thousands of people. 战争使成千上万的人背井离乡。 exceptional [ik‘sepʃənl] adj.例外的;异常的;特殊的;优
他的价值观念似乎陈旧了。 • immense [i mens] adj.极大的,巨大的
例句:They made an immense improvement in English.
在E英nd语方面他们取得了巨大的进步To。pic Above Next
centrifugal [sen‘trifjugəl] adj.离心的
Lesson 2
Mechanization and Automation
机械化和自动化
•Section I Words and Phrases 词 •Section II Text 英 and Translation 汉 •Section III Exercises 练 and Answers 答
Next End
他们买进了足以维持一个冬天的食品。 • discrimination [dis krimi neiʃən] n.辨别,鉴别,识
别,歧视 例句:He spoke out against racial discrimination.
他声言反对种族歧视。 These robots are capable of shape discrimination.