机械工程专业英语课件--L12.ppt

《机械工程专业英语课件--L12.ppt》由会员分享，可在线阅读，更多相关《机械工程专业英语课件--L12.ppt（39页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、English for Mechanical Engineering机械工程专业英语常州工学院机电工程学院徐红丽车床的特点：工件随主轴旋转，而刀具进给车床的特点：工件随主轴旋转，而刀具进给车床的类型：普通车床、转塔车床、仿形车床、单轴自动车床、车床的类型：普通车床、转塔车床、仿形车床、单轴自动车床、多轴自动车床多轴自动车床组成及原理：组成及原理：主轴箱：电机主轴箱：电机-齿轮变速齿轮变速-主轴主轴尾座：锥孔尾座：锥孔+顶尖顶尖导轨：平、燕尾导轨：平、燕尾刀架：中拖板（流板箱）作横向进给，大拖板作纵向移动刀架：中拖板（流板箱）作横向进给，大拖板作纵向移动丝杠：加工螺纹丝杠：加工螺纹光杠：切削外圆

2、、端面光杠：切削外圆、端面机械工程专业英语机械工程专业英语预备知识预备知识Lesson 24 Lathes 一、预备知识一、预备知识engine lathe 普通车床普通车床 turrent lathe 转塔车床转塔车床 tracing and duplicating lathe 仿形车床仿形车床 single-spindle automatic lathe 单轴自动车床单轴自动车床multi-spindle automatic lathe 多轴自动车床多轴自动车床 shape 牛头刨床牛头刨床 cylindrical grinder 外圆磨床外圆磨床 planer 龙门刨床龙门刨床 cent

3、reless grinder 无心磨床无心磨床surface grinder 平面平面磨床磨床 boring machine 镗床镗床 drilling machine 钻床钻床 milling machine 铣床铣床 broaching machine 拉床拉床 sawing machine 锯床锯床 gear-cutting machine 齿轮加工机床齿轮加工机床 Lesson 24 Lathes机械工程专业英语机械工程专业英语词词 汇汇二、词汇二、词汇chip 切屑切屑 collar 法兰盘法兰盘 key 键键compound rest 小刀架，复合刀架小刀架，复合刀架 T-slot

4、 T形槽形槽three jaw selfcentering chuck 三爪自定心卡盘三爪自定心卡盘chuck 卡盘卡盘 tailstock 尾座尾座 reamer 铰刀铰刀One pass 一次走刀一次走刀 gearing 齿轮传动装置齿轮传动装置 feed box 进给箱进给箱 power feed 机动进给机动进给carriage 大拖板大拖板 apron 溜板箱溜板箱Lesson 24 Lathes机械工程专业英语机械工程专业英语词词 汇汇二、词汇二、词汇机械工程专业英语机械工程专业英语A machine tool performs three major functions:(1)i

5、t rigidly supports the workpiece or its holder and the cutting tool;(2)it provides relative motion between the workpiece and the cutting tool;(3)it provides a range of feeds and speeds.Machines used to remove metal in the form of chips are classified in four general groups:those using single-point t

6、ools,those using multipoint tools,those using random-point tools(abrasive),and those that are considered special.课文分析课文分析Lesson 24 Lathes机械工程专业英语机械工程专业英语A machine tool performs three major functions:课文分析课文分析(1)it rigidly supports the workpiece or its holder and the cutting tool;(2)it provides relati

7、ve motion between the workpiece and the cutting tool;(3)it provides a range of feeds and speeds.机床能实现三大主要功能：机床能实现三大主要功能：(1)刚性支承工件或者夹具和刀具；刚性支承工件或者夹具和刀具；(2)在工件在工件和刀具之间提供相对运动；和刀具之间提供相对运动；(3)提供一定的进给速提供一定的进给速度和主轴转速范围度和主轴转速范围 Lesson 24 Lathes机械工程专业英语机械工程专业英语Machines used to remove metal in the form of chi

8、ps are classified in four general groups:those using single-point tools,those using multipoint tools,those using random-point tools(abrasive),and those that are considered special.课文分析课文分析以去除切屑形式来进行加工的机床主要被分为以去除切屑形式来进行加工的机床主要被分为四大类：使用单刃刀具切削的机床；使用多刃四大类：使用单刃刀具切削的机床；使用多刃刀具切削的机床；使用随机刀具切削的机床刀具切削的机床；使用随机刀

9、具切削的机床(磨削磨削)和适用于特殊场合的机床。和适用于特殊场合的机床。Lesson 24 Lathes机械工程专业英语机械工程专业英语Machines using basically the single-point cutting tools include:(1)engine lathes(2)turret lathes,(3)tracing and duplicating lathes,(4)single-spindle automatic lathes,(5)multi-spindle automatic lathes,(6)shapers and planers,(7)boring

10、 machines.课文分析课文分析Lesson 24 Lathes本质上，使用单刃刀具切削的机床包括：本质上，使用单刃刀具切削的机床包括：(1)普通车床；普通车床；(2)转塔车床；转塔车床；(3)仿形车仿形车床；床；(4)单轴自动车床；单轴自动车床；(5)多轴自动车床；多轴自动车床；(6)牛头刨床和龙门刨床；牛头刨床和龙门刨床；(7)镗床。镗床。转塔车床没有尾架和丝杠，而在尾架的位置上装有一转塔车床没有尾架和丝杠，而在尾架的位置上装有一个个装有一个能纵向移动装有一个能纵向移动多任务位主切削刀架（如：转多任务位主切削刀架（如：转塔刀架、回轮刀架），另外还具有辅助刀架（如：前、塔刀架、回轮刀架）

11、，另外还具有辅助刀架（如：前、后刀架），能完成卧式车床上的各种加工工序。是一后刀架），能完成卧式车床上的各种加工工序。是一种多刀、多任务位加工的高效机床，加工效率比卧式种多刀、多任务位加工的高效机床，加工效率比卧式车床高车床高2323倍。转塔车床的调整需花费较多时间，适合倍。转塔车床的调整需花费较多时间，适合于成批生产。于成批生产。此外，转塔车床刀架的纵横向进给设有撞停定此外，转塔车床刀架的纵横向进给设有撞停定程装置，可自动控制铬镍钢件尺寸，保证成批工件尺程装置，可自动控制铬镍钢件尺寸，保证成批工件尺寸的一致性，能自动实现机床的变速预选、进给量改寸的一致性，能自动实现机床的变速预选、进给量改变

12、等操作，或整机半自动化和自动化操作，为一人多变等操作，或整机半自动化和自动化操作，为一人多机看管和纳入自动线提供了条件。机看管和纳入自动线提供了条件。机械工程专业英语机械工程专业英语Machines using multipoint cutting tools include:(1)drilling machines,(2)milling machines,(3)broaching machines,(4)sawing machines,(5)gear-cutting machines.课文分析课文分析使用多刃切削刀具的机床包括；使用多刃切削刀具的机床包括；(1)钻钻床；床；(2)铣床；铣床；

13、(3)拉床；拉床；(4)锯床；锯床；(5)齿轮加工机床。齿轮加工机床。Lesson 24 Lathes机械工程专业英语机械工程专业英语Machines using random-point cutting tools include:1)cylindrical grinder,(2)centreless grinders,(3)surface grinders.Special metal removal methods include:(1)chemical milling,(2)electrical discharge machining,(3)ultrasonic machining.课文

14、分析课文分析使用随机刃切削刀具的机床包括：使用随机刃切削刀具的机床包括：(1)外圆外圆磨床；磨床；(2)无心磨床；无心磨床；(3)平面磨床。用特平面磨床。用特殊的方法进行金属切削的机床包括：殊的方法进行金属切削的机床包括：(1)化化学蚀刻；学蚀刻；(2)电火花加工；电火花加工；(3)超声波加工。超声波加工。Lesson 24 Lathes机械工程专业英语机械工程专业英语The lathe removes material by rotating the workpiece against a cutter to produce external or internal cylindrical

15、or conical surfaces.课文分析课文分析It is also commonly used for the production of flat surfaces by facing,in which the workpiece is rotated while the cutting tool is moved perpendicularly to the axis of rotation.车床是通过工件相对刀具的转动来去除金属材料，车床是通过工件相对刀具的转动来去除金属材料，以加工出外圆柱面、内圆柱面或锥形表面的。以加工出外圆柱面、内圆柱面或锥形表面的。车床的端面切削也普遍用

16、于平面加工。车床的端面切削也普遍用于平面加工。在端面切削加工中，工件旋转，而刀具在端面切削加工中，工件旋转，而刀具作垂直于工件回转轴线方向的进给运动。作垂直于工件回转轴线方向的进给运动。Lesson 24 Lathes机械工程专业英语机械工程专业英语The engine lathe is the basic turning machine from which other turning machines have been developed.The drive motor is located in the base and drives the spindle through a com

17、bination of belts and gears,which provides the spindle speeds from 25 to 1500 rpm.The spindle is a sturdy hollow shaft,mounted between heavy-duty bearings,with the forward end used for mounting a drive plate to impart positive motion to the workpiece.The drive plate may be fastened to the spindle by

18、 threads,by a cam lock mechanism,or by a threaded collar and key.课文分析课文分析Lesson 24 Lathes机械工程专业英语机械工程专业英语The engine lathe is the basic turning machine from which other turning machines have been developed.课文分析课文分析The drive motor is located in the base and drives the spindle through a combination of

19、belts and gears,which provides the spindle speeds from 25 to 1500 rpm.普通车床是车床的基本型，基于普通车床已经研制出普通车床是车床的基本型，基于普通车床已经研制出其它类型的车床。其它类型的车床。驱动电机安装在地基上并通过皮带传动驱动电机安装在地基上并通过皮带传动和齿轮传动来驱动主轴，以达到每分钟和齿轮传动来驱动主轴，以达到每分钟25到到1500转的主轴转速。转的主轴转速。Lesson 24 Lathes机械工程专业英语机械工程专业英语The spindle is a sturdy hollow shaft,mounted b

20、etween heavy-duty bearings,with the forward end used for mounting a drive plate to impart positive motion to the workpiece.课文分析课文分析The drive plate may be fastened to the spindle by threads,by a cam lock mechanism,or by a threaded collar and key.主轴是一根坚固的空心轴，装在重型轴承之间，其前主轴是一根坚固的空心轴，装在重型轴承之间，其前端用来安装驱动盘端

21、用来安装驱动盘(花盘花盘)，以便把确定的运动传到工，以便把确定的运动传到工件。件。该驱动盘可借助螺纹、凸轮锁紧机构或该驱动盘可借助螺纹、凸轮锁紧机构或借助一个螺纹垫圈和键固定在主轴上。借助一个螺纹垫圈和键固定在主轴上。Lesson 24 Lathes机械工程专业英语机械工程专业英语The lathe bed is cast iron and provides accurately ground sliding surfaces(way)on which the carriage rides.The lathe carriage is a H-shaped casting on which th

22、e cutting tool is mounted in a tool holder.The apron hangs from the front of the carriage and contains the driving gears that move the tool and carriage along or across the way to provide the desired tool motion.课文分析课文分析Lesson 24 Lathes机械工程专业英语机械工程专业英语The lathe bed is cast iron and provides accurate

23、ly ground sliding surfaces(way)on which the carriage rides.课文分析课文分析The lathe carriage is a H-shaped casting on which the cutting tool is mounted in a tool holder.车床的床身是铸铁件，它提供高精度的磨削过的滑动车床的床身是铸铁件，它提供高精度的磨削过的滑动表面表面(导轨导轨)，其上放有拖板。，其上放有拖板。车床拖板是车床拖板是H型的铸件，而刀具就安装型的铸件，而刀具就安装在拖板的刀架上。在拖板的刀架上。Lesson 24 Lathes机

24、械工程专业英语机械工程专业英语The apron hangs from the front of the carriage and contains the driving gears that move the tool and carriage along or across the way to provide the desired tool motion.课文分析课文分析溜板箱装在拖板前面，内装齿轮机溜板箱装在拖板前面，内装齿轮机构使刀具和拖板沿导轨或垂直导轨构使刀具和拖板沿导轨或垂直导轨移动以提供所希望的刀具运动。移动以提供所希望的刀具运动。Lesson 24 Lathes机械工程

25、专业英语机械工程专业英语A compound rest,located above the carriage provides for rotation of the tool holder through any desired angle.A hand wheel and feed screw are provided on the compound rest for linear motions of the tool.The cross feed is provided with a hand wheel and feed screw for moving the compound r

26、est perpendicular to the lathe way.A gear train in the apron provides power feed for the carriage both along and across the way.课文分析课文分析Lesson 24 Lathes机械工程专业英语机械工程专业英语A compound rest,located above the carriage provides for rotation of the tool holder through any desired angle.A hand wheel and feed

27、screw are provided on the compound rest for linear motions of the tool.拖板上面的复合刀架能使刀夹回转所要求的任拖板上面的复合刀架能使刀夹回转所要求的任意角度。意角度。复合刀架上的手轮和进给丝杆可以实现复合刀架上的手轮和进给丝杆可以实现刀具的直线运动。刀具的直线运动。Lesson 24 Lathes课文分析课文分析机械工程专业英语机械工程专业英语The cross feed is provided with a hand wheel and feed screw for moving the compound rest pe

28、rpendicular to the lathe way.A gear train in the apron provides power feed for the carriage both along and across the way.转动手轮和丝杠使复合刀架垂直于车床导轨移转动手轮和丝杠使复合刀架垂直于车床导轨移动，实现横向进给。动，实现横向进给。溜板箱中的齿轮传动装置可实现拖板沿溜板箱中的齿轮传动装置可实现拖板沿着导轨和横跨导轨的机动进给。着导轨和横跨导轨的机动进给。Lesson 24 Lathes课文分析课文分析机械工程专业英语机械工程专业英语The feed box conta

29、ins gears to impart motion to the carriage and control the rate at which the tool moves relative to the workpiece.On a typical lathe feeds range from 0.002 to 0.160 in.per revolution of the spindle,in about 50steps.Since the transmission in the feed box is driven from the spindle gears,the feeds are

30、 directly related to the spindle speed.The feed box gearing is also used in thread cutting and provides from 4 to 224 threads per in.课文分析课文分析Lesson 24 Lathes机械工程专业英语机械工程专业英语The feed box contains gears to impart motion to the carriage and control the rate at which the tool moves relative to the workp

31、iece.On a typical lathe feeds range from 0.002 to 0.160 in.per revolution of the spindle,in about 50steps.进给齿轮箱将运动传给拖板并控制刀具相对于进给齿轮箱将运动传给拖板并控制刀具相对于工件的运动速度。工件的运动速度。典型车床的进给范围是主轴每转从典型车床的进给范围是主轴每转从0.002到到0.160英寸，大约有英寸，大约有50级转速。级转速。Lesson 24 Lathes课文分析课文分析机械工程专业英语机械工程专业英语Since the transmission in the feed

32、 box is driven from the spindle gears,the feeds are directly related to the spindle speed.The feed box gearing is also used in thread cutting and provides from 4 to 224 threads per in.由于进给箱的变速是由主轴齿轮驱动的，因此由于进给箱的变速是由主轴齿轮驱动的，因此进给量直接与主轴转速有关。进给量直接与主轴转速有关。进给箱齿轮传动机构也用于螺纹加工，进给箱齿轮传动机构也用于螺纹加工，并能加工每英寸并能加工每英寸4到

33、到224扣的螺纹。扣的螺纹。Lesson 24 Lathes课文分析课文分析机械工程专业英语机械工程专业英语The connecting shaft between the feed box and the lathe apron are the feed rod and the lead screw.Many lathe manufacturers combine these two rods in one,a practice that reduces the cost of the machine at the expense of accuracy.The feed rod is us

34、ed to provide tool motion essential for accurate workpiece and good surface finishes.The lead screw is used to provide the accurate lead necessary for the thread cutting.The feed rod is driven through a friction clutch that allows slippage in case the tool is overloaded.This safety device is not pro

35、vided in the lead screw,since thread cutting cannot tolerate slippage.Since the full depth of the thread is seldom cut in one pass,a chasing dial is provided to realign the tool for subsequent passes.课文分析课文分析Lesson 24 Lathes机械工程专业英语机械工程专业英语The connecting shaft between the feed box and the lathe apro

36、n are the feed rod and the lead screw.Many lathe manufacturers combine these two rods in one,a practice that reduces the cost of the machine at the expense of accuracy.进给箱和车床溜板箱之间的连结轴是光杠和丝杠。进给箱和车床溜板箱之间的连结轴是光杠和丝杠。许多车床制造商把这两杆合二为许多车床制造商把这两杆合二为一，实际上那就以降低精度为代一，实际上那就以降低精度为代价减少机床的成本。价减少机床的成本。Lesson 24 Lath

37、es课文分析课文分析在损害在损害情况下，情况下，以以为牺牲为牺牲/代价代价 机械工程专业英语机械工程专业英语The feed rod is used to provide tool motion essential for accurate workpiece and good surface finishes.The lead screw is used to provide the accurate lead necessary for the thread cutting.The feed rod is driven through a friction clutch that allo

38、ws slippage in case the tool is overloaded.光杠提供了刀具的运动，它对于高精度的工件和良光杠提供了刀具的运动，它对于高精度的工件和良好的表面光洁度是很重要的。好的表面光洁度是很重要的。丝杠用于提供精确的丝杠用于提供精确的(螺纹螺纹)导程，这对于螺纹切导程，这对于螺纹切削是必需的。光杆是通过摩擦离合器来驱动的，削是必需的。光杆是通过摩擦离合器来驱动的，这样允许打滑以免刀具过载。这样允许打滑以免刀具过载。Lesson 24 Lathes课文分析课文分析机械工程专业英语机械工程专业英语This safety device is not provided in

39、 the lead screw,since thread cutting cannot tolerate slippage.Since the full depth of the thread is seldom cut in one pass,a chasing dial is provided to realign the tool for subsequent passes.这一安全装置不能装在丝杆上，因为螺纹加工是不这一安全装置不能装在丝杆上，因为螺纹加工是不允许打滑的。允许打滑的。由于螺纹全深很难一次走刀加工完成，由于螺纹全深很难一次走刀加工完成，因此装设一螺纹指示盘作为后续走刀因此

40、装设一螺纹指示盘作为后续走刀加工时重新对刀用。加工时重新对刀用。Lesson 24 Lathes课文分析课文分析机械工程专业英语机械工程专业英语The lathe tailstock is fitted with an accurate spindle that has a tapered hole for mounting drills,drill chucks,reamers,and lathe centers.The tailstock can be moved along the lathe ways to accommodate various lengths of workpiec

41、es as well as to advance a tool into contact with the workpiece.The tailstock can be offset relative to the lathe ways to cut tapers or conical surfaces.车床尾座内装有一高精度的轴，该轴有一锥孔，以车床尾座内装有一高精度的轴，该轴有一锥孔，以便安装钻头、钻夹、铰刀和车床顶针。便安装钻头、钻夹、铰刀和车床顶针。尾座可以沿着车床导轨移动以适应工件的不同长尾座可以沿着车床导轨移动以适应工件的不同长度和在加工中使刀具与工件接触，尾座相对导轨度和在加工中

42、使刀具与工件接触，尾座相对导轨偏置一角度以加工出锥体或锥形表面。偏置一角度以加工出锥体或锥形表面。Lesson 24 Lathes课文分析课文分析机械工程专业英语机械工程专业英语The turret lathe is basically an engine lathe with certain additional features to provide for semiautomatic operation and to reduce the opportunity for human error.课文分析课文分析Lesson 24 Lathes转塔车床基本上是具有某种附加特性转塔车床基本上

43、是具有某种附加特性的普通车床，实现半自动加工以减少的普通车床，实现半自动加工以减少人工操作误差的机会。人工操作误差的机会。转塔车床没有尾架和丝杠，而在尾架的位置上装有一转塔车床没有尾架和丝杠，而在尾架的位置上装有一个个装有一个能纵向移动装有一个能纵向移动多任务位主切削刀架（如：转多任务位主切削刀架（如：转塔刀架、回轮刀架），另外还具有辅助刀架（如：前、塔刀架、回轮刀架），另外还具有辅助刀架（如：前、后刀架），能完成卧式车床上的各种加工工序。是一后刀架），能完成卧式车床上的各种加工工序。是一种多刀、多任务位加工的高效机床，加工效率比卧式种多刀、多任务位加工的高效机床，加工效率比卧式车床高车床高2

44、323倍。转塔车床的调整需花费较多时间，适合倍。转塔车床的调整需花费较多时间，适合于成批生产。于成批生产。此外，转塔车床刀架的纵横向进给设有撞停定此外，转塔车床刀架的纵横向进给设有撞停定程装置，可自动控制铬镍钢件尺寸，保证成批工件尺程装置，可自动控制铬镍钢件尺寸，保证成批工件尺寸的一致性，能自动实现机床的变速预选、进给量改寸的一致性，能自动实现机床的变速预选、进给量改变等操作，或整机半自动化和自动化操作，为一人多变等操作，或整机半自动化和自动化操作，为一人多机看管和纳入自动线提供了条件。机看管和纳入自动线提供了条件。机械工程专业英语机械工程专业英语The carriage of the tur

45、ret lathe is provided with T-slots for mounting a tool-holding device on both sides of the lathe ways with tools properly set for cutting when rotated into position。课文分析课文分析Lesson 24 Lathes转塔车床的拖板设有转塔车床的拖板设有T形槽以便在车床形槽以便在车床导轨两端安装夹刀装置，当转塔转入导轨两端安装夹刀装置，当转塔转入到合适位置时，要正确地装设刀具以到合适位置时，要正确地装设刀具以便进行切削。便进行切削。机械

46、工程专业英语机械工程专业英语The carriage is also equipped with automatic stops that control the tool travel and provide good reproduction of cuts.The tailstock of the turret lathe is of hexagonal design,in which six tools can be mounted.拖板也装设有自动停机装置以便控制刀具行程和提拖板也装设有自动停机装置以便控制刀具行程和提供良好的重复加工。供良好的重复加工。转塔车床的尾座是六角形结构，在

47、六转塔车床的尾座是六角形结构，在六角头中可以装六把刀具。角头中可以装六把刀具。Lesson 24 Lathes课文分析课文分析机械工程专业英语机械工程专业英语Although a large amount of time is consumed in setting up the tools and stops for operation,the turret lathe,once set,can continue to duplicate operations with a minimum of operator skill until the tools become dulled and

48、 need replacing.课文分析课文分析Lesson 24 Lathes虽然安装刀具和撞停止动块要花大量时间，虽然安装刀具和撞停止动块要花大量时间，但转塔车床一次装刀以后，在缺少熟练工人但转塔车床一次装刀以后，在缺少熟练工人的情况下也可以连续的重复加工，直到刀具的情况下也可以连续的重复加工，直到刀具变钝和需要换刀为止。变钝和需要换刀为止。机械工程专业英语机械工程专业英语Thus,the turret lathe is economically feasible only for production work,where the amount of time necessary to

49、prepare the machine for operation is justifiable in terms of the number of part to be made.课文分析课文分析Lesson 24 Lathes因而，转塔车床仅用于成批生产才是经济上因而，转塔车床仅用于成批生产才是经济上是可行的、合理的，此时，根据所制造零件是可行的、合理的，此时，根据所制造零件的数量，为加工准备需要花一定数量的时间的数量，为加工准备需要花一定数量的时间是合理的。是合理的。机械工程专业英语机械工程专业英语Tracing and duplication lathes are equipped w

50、ith a duplicating device to automatically control the longitudinal and cross feed motions of the single-point cutting tool and provide a finished part of required shape and size in one or two passes of the tools.课文分析课文分析Lesson 24 Lathes仿形车床装有一个仿形装置以自动控制单刃仿形车床装有一个仿形装置以自动控制单刃刀具的纵向和横向进给运动，并可以一次或刀具的纵向和横