机电专业英语高职层次资料.ppt
书名：机电专业英语ISBN：978-7-111-43709-3作者：严振宁出版社：机械工业出版社本书配有电子课件,Catalog,1.Unit1 Engineering Drawing 2.Unit 2 Mechanical Properties of Metals3.Unit3 Mechanical Parts 4.Unit4 Tolerance and Fits5.Unit5 Machine Tools 6.Unit6 Machining7.Unit7 Basic knowledge of fitter8.Unit8 Welding9.Unit9 Mechatronics10.Unit10 CNC Machines,Unit1 Engineering Drawing-Text,1.Engineering drawing covers a detailed structure of a single part.There are many types of engineering drawings.,Unit1 Engineering Drawing-Text,2.But the general arrangement of all these parts is shown in an assembly drawing.,Unit1 Engineering Drawing-Text,3.Assembly drawings consist of the following features:1).Dimensions:2).Internal parts:3).Parts list:,Unit1 Engineering Drawing-Text,4.For example,the column of“Quantity”means the quantity of the parts,the column of“Material”is used for components that are being made in the company.And the“Remarks”column is useful for specifying a manufactures part number.,Unit1 Engineering Drawing-Words and Expressions,arrangement reindmnt n.排列，安排assembly sembli n.集合，装配feature fi:t n.特色，特征dimension dimenn n.尺寸，尺度view vju:n.视图list list n.目录，列表，数据清单identify aidentifai vt.识别，鉴别，确定,Unit1 Engineering Drawing-Words and Expressions,manufacture mnjufkt n.制造者，制造商consist of 由组成engineering drawing 工程制图assembly drawing 装配图sectional view 截面图，断面图，剖视图parts list 零件清单,Unit1 Engineering Drawing-Synchronous reading,()1.Before you start your engineering drawing,the first thing is to make best use of the space.()2.There are at least five rules you should obey before you producing an engineering drawing.()3.Every engineering drawing must include an information box.()4.The Scale is very important and it have effect on the final size of the product.()5.The same one to finish the drawing and checking is allowed.,Unit 2 Mechanical Properties of Metals-Text,1.Metals have played an important part in mans activities for many centuries.Wood and stone are both older in use,and later they have been supplanted by metals to a considerable extent.,Unit 2 Mechanical Properties of Metals-Text,2.Metals have a great importance because of their useful properties.Metals are much stronger and harder than wood.Metal is not so brittle as stone.Strength,hardness and plasticity of metals are the properties which make metals very useful for industry.It is possible to find some plastic wood but it is much softer than many metals have a combination of these three useful properties.,Unit 2 Mechanical Properties of Metals-Text,3.Metals are very important in industry.All machines have metal parts and some of them consist only of metal parts.,Unit 2 Mechanical Properties of Metals-Words and Expressions,century senturi n.世纪supplant spla:nt v.代替，取代considerable kensiderebl a.相当大(或多)的extent ikstent n.程度brittle britl a.易碎的，脆的strength stre n.力，力量，强度plasticity plstisiti n.可塑性，成形性,Unit 2 Mechanical Properties of Metals-Words and Expressions,combination kmbineien n.结合part pa:t n.零件，部件consist knsistv.由构成，由组成play part 起作用to a considerable extent 在极大的程度上because of 因为not soas 没有那样,Unit 2 Mechanical Properties of Metals-Synchronous reading,()1.The material of metal can to classified into three categories.()2.Aluminum is lightweight and softer than steel.()3.Stainless steel is a relatively hard material and tends to shorten the life of the cutting tools.(4.Typical carbon steel can be subjected to various heat treatments.()5.The brass has not sogood soldering properties.,Unit3 Mechanical Parts-Text,1.Machine elements are elementary mechanical parts used as building blocks for the construction of a device,apparatus or machinery.2.The most common example of machine elements is a gear.Gear is a toothed wheel.The rotation of a gear on a hub or shaft drives other gears rotating faster or slower depending upon the number of tooth on the basic wheels.,Unit3 Mechanical Parts-Text,3.The material of a gear establishes its strength and hardness of its surface determining its resistance to wear.Knowledge of the forces on the gear makes possible the determination of its size.,Unit3 Mechanical Parts-Text,4.Changes in its shape allow modifications in its use.These applications have developed into many standard forms of gears such as spur,bevel,helical and worm gears.,Unit3 Mechanical Parts-Text,5.Other fundamental machine elements are shafts,bearings and screws mainly.,Unit3 Mechanical Parts-Words and Expressions,mechanical miknikl a.机械的block blk n.部件，块料device divais n.装置，设备apparatus preits n.器械，仪器machinery mi:nri n.机械，机器tooth tu:n.牙齿wheel hwi:l n.轮，机轮rotation rten n.旋转，转动hub hb n.衬套，（轮）毂,Unit3 Mechanical Parts-Words and Expressions,modification mdfken n.更改，修改standard stndd n.标准，规范bevel bevl n.斜角helical helikl a.螺旋形的worm w:m n.蜗杆machine element 机械零件resistance to wear 耐磨性,Unit3 Mechanical Parts-Words and Expressions,spur gear 正齿轮bevel gear 伞齿轮helical gear 螺旋齿轮，斜齿轮worm gear 蜗轮journal bearing 轴颈轴承ball bearing 球轴承roller nearing滚柱轴承,Unit3 Mechanical Parts Synchronous reading,()1.A machine is combined by individual machine elements such as nuts,bolts,springs,gears,cams and shafts and so on.()2.The most common example of a machine element is a nut.()3.The rotation of this gear drives other gears that may rotate faster or slower,depending upon the number of teeth on the basic wheels.()4.All machine elements are completely standardized.()5.In the automotive industry fasteners,bearing bushings,chains and connecting rods are standardized.,
