机电工程专业英语.ppt

1、Unit 1 The History of CNC and NC Development,What is NC?,Mechatronics,Mechanics + Electronic,=,machine tool 机床,colleague,同事,after-sales services,售后服务,磁盘驱动器,customer services,客服服务,according to,根据,What is the term of methatronics?,Mechatronics is the combination of mechanical engineering, electronic e

2、ngineering and software engineering.,The main idea of the dialogue,Mechatronics Mechanics + Electronic To know something about a company. After-sales service is also key work for a company.,Im Pro.Smith. Before introducing the term of Mechatronics, Id like to ask you two questions.,Text What is the

3、definition of mechatronics?,machine tool 机床,Mechatronics is the combination of mechanical engineering, electronic engineering and software engineering.,What do you think of Mechatronics?,Look! The various fields that make up Mechatronics,machine tool 机床,The portmanteau Mechatronics was first coined

4、by Mr. Tetsuro Mori, a senior engineer of the Japanese company Yaskawa, in 1969.,machine tool 机床,portmanteau,混成词,coin,创造,The advantages of using the mechatronics modules.,machine tool 机床,Through collaboration the mechatronic modules perform the production goals and inherit flexible and agile manufac

5、turing properties in the production scheme.,Describe the architectures mentioned in this passage.,machine tool 机床,The most known architectures involve hierarchy, polyarchy, heterarchy and hybrid.,Assignment,Copy the new words. 2. Q1、Q2、Q3 、 Q4 and Q5,Summary of Mechatronics,Mechatronics is the combi

6、nation of mechanical engineering, electronic engineering and software engineering. Nowdays it is widely used in the industrial fileds.,Lets look at some pictures and then try to describe what intelligent manufacturing system is.,Types of CNC Equipment,Vertical machining center （立式加工中心） Horizontal ma

7、chining center（卧式加工中心）,Turning center （车削中心）,What is NC?,Homework,1. Copy the new words.,2.Understand the whole text by the questions that we referred in the text.,Unit 2 Cutting Tools,What is NC?,Job Application,Taking part in an interview,磁盘驱动器,Are there any vacancies in your factory?,Vacancy n. 空

8、缺；空位,What was your major?,major n. 专业,My major was mechanical manufacturing, and I think I am good at operating milling machine.,mechanical manufacturing,机械制造,milling machine,铣床,How to take part in an interview?,The main idea of the dialogue,How to take part in interview? Some key words about interv

9、iew. To know something about milling machine.,Today, Ill describe the different cutting tools.,Cutting Tools,Metal cutting tools must possess a variety of different properties in order to cut the different metals under varying conditions of severity.,hardness at high temperature. 2. wear resistance.

10、 3. impact strength,The properties of cutting tools,All metal cutting tools begin to lose hardness when heated to sufficiently high temperatures 达到一定高温度时，所有的金属切削刀具便开始软化。 What should we care for when we use the cutting tools?,1.Hardness 2.Degree 3.Selection of a cutting tool material,The various mate

11、rials from which most metal cutting tools are made,1. Carbon tool steel 2. High-speed steel 3. Cast alloys 4. Cemented carbides 5. Ceramics 6. Diamonds,Tool life，or the number of parts produced by a cutting-tool edge before regrinding is required，is a very important cost factor in manufacturing a pa

12、rt or product. 刀具寿命，即切削刀刃在需要重新打磨之前能加工的零件数，是生产某个零件或产品的重要成本因素,In order to detect the time when a cutting tool should be changed，most modern machines are equipped with indicators that show the horsepower used during the machining operation detect- 发现 horsepower-马力,Now lets make a summary about what we

13、have learned in this lesson.,1.cutting tools 2.different materials to be used when we make cutting tools. ( 1 ) Carbon tool steel ( 2 ) High-speed steel ( 3 ) Cast alloys ( 4 ) Cemented carbides ( 5 ) Ceramics ( 6 ) Diamonds,Unit 3 Industrial Robots,In your opinion, what does robot look like?,Dialog

14、ue,welcome to our industrial robot show. industrial robot 工业机器人 show 展览,Comparing industrial robots with robots,These robots can do many things for us,To handle materials To spray paint To rescue people from the fire and even help to explore deep oceans and outer-space.,How does robot work?,Robots a

15、re a programmable mechanical manipulator. Being programmed with human instructions, they can move along several directions and do factory work usually done by human beings.,Industrial Robot,These robots do not look or behave like human beings, but they do the work of humans.,一、Definition of industri

16、al robots,机械装置,自动操作,以类人方式工作,一、Definition of industrial robots,可重复编程的操作机,设计用来搬运材料等,通过各种编程动作,一、Definition of industrial robots,Exercises,二、The makeup of industrial robots,操作机 manipulator,末端执行器 end-effector,腕部 wrist,机座 noumenon,行走机构 motion device,臂部 arm,the most distal group of joints,the main frame,二、

17、The makeup of industrial robots,操作机 manipulator,驱动系统 drive system,液压式、气动式 电动式、特种式,控制系统 control system,人工智能系统 man-made aptitude system,感觉系统（硬件） 决策、规划系统（软件）,back,The industrial robot is a( ), capable of moving along several directions, equipped at its end with a device called the ( ), and performs ( )

18、 ordinarily done by human beings, and capable of ( ).,可编程的操作机,programmable manipulator,末端执行器,end-effector,工厂作业,factory work,stand-alone operation,独立操作,一、Definition of industrial robots,End-Effector,Robot tool,a welding head a spray gun a machining tool a gripper containing on-off jaws,焊头,喷枪,加工工具,可开闭

19、的钳爪,Guess,Unit 4 CAD and CAM,Topic Introduction:,Mr. Robert, general manager of Sino-German Auto Parts Manufacturing Cooperation, is visiting the training center and CAD/CAM lab of a school.,Welcome to our school,Schedule,introduce each other,visit the training center,visit the CAD/CAM lab,introduce

20、 each other,Mr. Jiang dean of the electromechanical department,Mr. Robert general manager of Sino-German Auto Parts Manufacturing Cooperation,Mr. Jin manager of the personnel department,visit the training center,look at the equipment,NC lathe with a MITSUBISHI M50 L NC system of Japanese,NC milling

21、machine with an FANUC system,visit the training center,ask students to operate the Machining Center,visit the CAD/CAM lab,configuration of computers,Pentium 586 64-128M Memory AutoCAD, Master CAM , EDA and PLC software Pro-engineer in teacher computer Multi-media ( big-screen projection,visit the CA

22、D/CAM lab,lessons given in the computer room,computer fundamentals and applications CAD/CAM Numerical Programming EDA PLC Computer Networks E-commerce,Consolidation,general manager personnel department electromechanical integration be good at operations be rich in practical experience CAD intermedia

23、te,总经理 人事部 机电一体化 擅长操作 实践经验丰富 CAD中级,Assignment,Perform the dialogue. 2. Recite the words and phrases.,Teaching Aim:,To make the students know the development history of CAD. 2. To learn about three-dimensional solid modeling and application of CAD.,brief history of CAD,CAD is a product of the compute

24、r era. It originated from early computer graphic systems to the development of interactive computer graphics.,CAD是计算机时代的产品。 它从早期的计算机绘图系统发展到现在的交互式计算机图形学。,in the beginning,CAD systems were no more than a graphics editor with some built-in design symbols.,the 1970s,the invention of three-dimensional so

25、lid modeling marked the beginning of a new era in CAD .,三维实体建模的发明标志着CAD一个新时代的开始。,application of CAD,CAD implementations on personal computer ( PCs ) have brought CAD to the masses.,在个人计算机上，CAD已经走向大众化。,Practice,CAD APT 个人计算机 线框,计算机辅助设计 自动编程语言 personal computer wire-frame,Assignment,Recite some key wo

26、rds and phrases.,Unit 5 Heat Treatment of Steels,What is NC?,Do you know heat treatment?,How many types of heat treatment are there?,Heat treatment is a method by which the heat treatment can change the physical properties of a material.,There are four main operations:,annealing normalizing hardenin

27、g tempering,What is critical temperature?,It is the temperature at which a certain change takes place in the physical condition of the steel.,Practice,Read the dialogue again and translate some important sentences.,Discuss “Heat Treatment of Steels”,the heating and cooling operations performed on a

28、metal for the purpose of altering such characteristics as,hardness,strength,ductility,A tool steel intended to be machined into a punch may first be softened so that it can be machined,要想把一块工具钢加工成一只冲头，可先使其变软， 以便能进行机械加工,When a steel part is to be either hardened or softened , its temperature must be

29、taken above the critical temperature line；,Temperature,50-100,When the heating time is completed，the steel must be cooled down to room temperature,room temperature 常温，室温,Annealing leaves the steel in the softest possible condition (dead soft),dead soft 极软,Assignment,Finish the exercises II, III. 2.

30、Recite some key phrases .,Unit 6 Properties of Materials,Welcome to our factory!,In what area is basic stretch forming mainly used?,Basic industrial stretch forming is used mainly in the aircraft industry,?,what are advantages of stretch draw forming?,The advantages of this process are the lack of s

31、pring-back in the finished part, the utilization of a single action press,What is the classical disadvantage?,Stretch draw forming is applied only to certain panel designs.,What are the physical properties of a material?,The physical properties of a material color，density，specific heat，coefficient o

32、f thermal expansion，thermal and electrical conductivity，magnetic properties，and melting point,machine tool 机床,What are the mechanical properties of a material?,Mechanical properties fall into five broad categories： 1.Strength 2. Hardness 3. Elasticity 4. Ductility 5. Toughness,(1)Strength is the abi

33、lity of a material to resist penetration and abrasion,(2)Hardness is the ability of a material to resist penetration and abrasion,machine tool 机床,(3)Elasticity is the ability to spring back to original shape,(4)Ductility is the ability to undergo permanent changes of shape without rupturing,machine

34、tool 机床,(5)Toughness is the ability to absorb mechanically applied energy,Assignment,Recite some key words and phrases.,Unit 7 What Manufacturing Is All About?,Weve been to the automatic factory. Do you remember what it likes?,Automatic Factory,1. There are no people working at all.,2. All the parts

35、 are made by automatic machines.,3. All machines are moved by automatic materials-handing equipment.,4. All assembly work is also done on an automatic assembly line.,5. The quality control is checked automatically.,the assembly line,All the assembly work is done automatically with nobody working ins

36、ide.,Everything here is done automatically. Even the quality control is done automatically.,Why is there no light in the workshop?,Most machines dont need light for their work. They dont need comfortable temperature.,How can all this be made possible?,It is the computer that has made it possible.,Te

37、aching Aim:,To make the students understand the definition, effect and importance of manufacturing.,screw,suitcase,piano,blue jeans,chair,Light bulbs,Manufactured products are all round us.,Effect of manufacturing,What will our life be without manufacturing?,have no bicycle to ride have no televisio

38、n to watch have no sneakers to wear There would be no clothes, no furniture, no airplanes, even the lifesaving devices such as artificial hearts.,Definition of manufacturing,Manufacturing is making products. Making parts and putting them together is manufacturing.,Unit 8 The Advantages and Disadvant

39、ages of CNC,The Advantages and Disadvantages of CNC,Welcome to our factory!,CNC machine tools,CNC lathes,CNC millers,CNC machining center,What is NC?,CNC lathes 数控车床,CNC millers 数控磨床,CNC machining center 数控加工中心,How to operate CNC tools?,It is not very difficult, if we are diligent in work.,How many

40、advantages of CNC machines are there?,There are six advantages. The best advantage of CNC machines is Production is significantly increased,machine tool 机床,conventional,profile,conventional machine,普通的；常规的,外形；轮廓,常规机床,what are the disadvantages of CNC machine?,(1)They are quite expensive (2)They have

41、 to be programmed，set up，operated，and maintained by highly skilled personnel,machine tool 机床,which enables them to answer the increasingly strong requirements for production speed and quality that competitive markets demand,machine tool 机床,production speed 生产速度 markets demand 市场需求,HOMEWORK,Oral 2. P

42、review the text of unit 9.,Teaching Aim:,To learn about open system and closed system. 2.To learn about the advantages and bright future of automatic control systems.,Automatic control system,open system,closed system,Difference between the two systems,In the open system, the output of the process h

43、as no effect upon the input to the process.,在开环系统中，过程的输出量对于输入量无影响。,In the closed system, the energy input to the system is some function of the output itself. This effect is commonly termed feedback; hence the system is a feedback control system,在闭环系统中，输入量是输出量的函数。 这种影响通常称之为反馈，故闭环系统就是个反馈系统。,Advantage

44、 of automatic control system,Automatic controllers have performed great functions in industry. They have made it possible to produce a more uniform quality of product. Because they are on the job 100 percent of the time, whereas a human operator finds it necessary to take rest and finds it difficult

45、 to remain alert on repetitious jobs. It need not rest and would not become tired.,Bright future of automatic system in application,The workers and technicians of our country have designed and made various automatic devices, which have made it possible to increase production, to reduce production co

46、sts and to secure the safety of operating workers. Furthermore, with the wide-spread application of automatic controllers, more and more workers are free from routine operations and they can concentrate on production in breadth and depth.,Practice,Translate the following sentences into Chinese.,1. I

47、n the open system, the output of the process has no effect upon the input to the process.,在开环系统中，过程的输出量对于输入量无影响。,2. The closed system is used in every completely automatic control application.,闭环系统则在每一个完善的自动控制中得到应用。,3. Automatic controllers have performed great functions in industry.,自动控制器在工业上起着重大的作

48、用。,Assignment,Recite some words and translate some sentences into Chinese.,Unit 11 Mold Technology,Miss Li,Tom,What is NC?,Do you know about the kinds of steels?,carbon steel,alloy steel,What are the main plastic mold materials in mold manufacturing?,machine tool 机床,paper match,plaster,metal,纸梗火柴,塑料

49、,金属,It is interesting in this regard that，in many cases， the selection of the mold material is not only a question of material properties and an optimum price-to-performance ratio but also that the methods used to produce the mold， and thus the entire design can be influenced.,在许多情况下，选择哪种模具材料不仅要考虑材料

50、的特性和最佳的性价比，还要考虑模具的制造方法，因为他们影响整体设计。,A typical example can be seen in the choice between cast metal molds，with their very different cooling systems， compared to machined moldsIn addition，the production technique can also have an effect；for instance，it is often reported that，for the sake of simplicity，

51、a prototype mold is frequently machined from solid stock with the aid of the latest technology such as computer-aided design (CAD) and computer-integrated manufacturing (CIM),一个典型的例子，铸造金属模和机械模的冷却系统区别很大，另外生产技术也有影响：例如，经常报道，为简单起见，固态胚料常用像计算机辅助设计和计算机一体化制造这样的最新技术制造成原型模具。,In contrast to the previously used

52、 methods based on the use of patterns，the use of CAD and CIM often represents the more economical solution today，not only because this production capability is available in-house but also because with any other technique an order would have to be placed with an outside supplier.,与以前制造模型的方法相比，CAD和CAM

53、的应用代表了当今更为经济的制造方法，不仅因为内部生产能力可以利用，而且因为若采用其他工艺技术，定单必然会落入厂外供应商手里。,Overall，although high-grade materials are often used，as a rule，standard materials are used in mold makingNew，high-performance materials，such as ceramics，for instance，are almost completely absentThis may be related to the fact that their

54、desirable characteristics，such as constant properties up to very high temperatures，are not required in molds，whereas their negative characteristics，e.g.，low tensile strength and poor thermal conductivity，have a clearly related to ceramics，such as sintered material，is found in mo1d making only to a l

55、imited degreeThis refers less to the modern materials and components produced by powder metallurgy， and possibly by hot isostatic pressing，than to sintered metals in the sense of porous, air-permeable materials,总之，模具制造通常使用标准材料，高级材料也常被使用。例 如，新型高性能材料（如陶瓷）还几乎没被使用。可能的相关因素 是在非常高温下性能仍能稳定，这种好的特性模具中并不需要，更 不

56、用说，陶瓷还有不好的特性，如抗张程度低，导热性差，模具制 造中烧结材料的使用还是有限的。与多孔透气的烧结材料相比，用 粉末冶金和热等静压加工的现代材料和零件则更少使用。,Removal of air from the cavity of a mold is a necessary with many different processing methods, and it has been proposed many times that this can be accomplished using porous metallic materials1. The advantages over

57、 specially fabricated venting devices，particularly in areas where melt flow fronts meet，i.e., at weld 1ines，are as obvious as the potential problem areas：on one hand，preventing the texture of such surfaces from becoming visible on the finished product， and on the other hand，preventing the micropores

58、 from quickly becoming clogged with residues. It is also interesting in this case that completely new possibilities with regard to mo1d design and processing technique result from the use of such materialsThe process steps of venting，cooling，and ejection in relation to the use of sintered metals can be best illustrated with the aid of the sketches shown in Fig.11-1,在许多不同的成型方法中，都必须将型腔中的气体排除，人们已经尝试使用多孔