机械专业英语课件10.ppt

上一课回顾 单词复习： Turning/milling/grinding Tool work piece Metalcutting Lathe/planer Hybrid rigidity Lesson 10 Lathes 车床  重点词汇： 1. engine lathe 普通车床 2. production and maintenance shops 生产和维修车间 3. carriage n. 溜板 四轮马车 4. piston 活塞 5. dismount n. v. 卸下，拆除，拆卸 6. set up 调整，准备，安装 7. forging n. 锻件 a.锻造的 8. work on 对… 进行加工 9. end working and side-working 端面和侧面加工 Paragraph 1 Lathes are widely used in industry to produce all kind of machined parts. Some are general-purpose(通用的) machines, and others are used to perform highly specialized operations. 车床在工业生产中被广泛用来加工各种类型的机械零件。一些车床是通用机床，而另一些车床则被用来完成某些专门工序的加工任务。 Paragraph 2:  Engine Lathes普通车床 Engine lathes, of course are general-purpose machines used in production and maintenance shops all over the world. 普通车床是全世界的生产车间和维修车间里广泛使用的通用机床。 Sizes range from small bench models to huge heavy-duty(重型的) piece of equipment. 它的尺寸范围很大，从小型的台式车床(bench models)到巨大的重型车床。 Many of the larger lathes come equipped with attachments not commonly found in the ordinary shop, such as automatic stops for the carriage. 许多大型的车床配备在普通车间中通常看不到的附件，例如，溜板的自动挡块。 Paragraph 3:Tracer or Duplicating Lathes仿形/靠模车床 The tracer or duplicating lathe is designed to produce irregularly shaped parts automatically. The basic operation of this lathe is as follows: A template(模板、模型) of either a flat or three-dimensional shape is placed in a holder. 靠模车床或仿形车床（tracer or duplicating lathe）设计用来对形状不规则的零件进行自动加工。这种车床的基本操作如下：在夹持装置上安装平面或立体形状的样板。 A guider or pointer(仿形指) then moves along this shape and its movement controls that of the cutting tool. 然后，导向触头或指针沿着它的外形移动，从而控制切削刀具的运动。 The duplication may include a square or tapered(锥形的) shoulder(台肩), grooves, tapers(锥体), and contours. 仿形加工可以包括方形或锥形轴肩、各种槽、锥体或轮廓。 Works such as motor shafts, spindles, pistons, rods, car axles, turbine shafts, and a variety of other objects can be turned using this type of lathe. 像电机的轴、主轴、活塞(pistons)、连杆、汽车轴、汽轮机轴和其他很多种类的工件都可以采用这种车床来进行加工。 Paragraph 4: Turret Lathes