数控技术英语Unit12

1、.,1,Unit 12 Getting to Know Machining Center,第12单元 认识加工中心,.,2,grasp r:sp v. 掌握，握住 bore b: v. 镗 tap tp v. 攻螺纹 ream ri:m v. 铰削 depend dipend v. 视而定 powerful pauful adj. 有力的，强大的 drum drm n. 鼓形刀具 classify klsifai v. 将分类,Words and Phrases,.,3,widely wadl adv. 广泛地 flat flt adj. 扁平的 mold muld n.模具 die work

2、 冲压模 particularly ptikjulli adv. 特别地 boxy bksi adj. 箱子般的 fixture fikst n.卡器 measure me v. 测量 input input v. 输入,.,4,We have learned several different machines, such as milling machines, turning machines and so on. Is there any kind of machine with all the functions of they have? Yes, it is called mac

3、hining center. Now, lets go and learn to operate it. 我们已经学习了几种不同的机床，比如铣床、车削加工中心等。是否有一种机床拥有它们所有的功能呢？有，它叫加工中心。现在，让我们去学习操作它。,Introduction,.,5,Look and name,.,6,Look and learn,plane,sewing machine,mills,machining center,.,7,Look and write,grasp,powerful wave,workpiece,.,8,Lisa and the students are stand

4、ing in front of a machining center. It looks very huge and complicated. They are very curious about it. 丽莎和学生们正站在加工中心的前面。它看起来很大很复杂。他们对它很好奇。 David: What is a machining center, Lisa? 大卫：加工中心是什么，丽莎？,Listen and complete,.,9,Lisa: Machining Center is a machine with several functions. Its like a human, us

5、ing different cutting tools to perform different machining operations on a workpiece. 丽莎：加工中心是多功能机床。它就像一个人，使用不同的刀具在工件上执行不同的加工操作。 David: What can a machining center do? Can you show me some examples? 大卫：加工中心能做什么？你能告诉我一些例子吗？ Lisa: Yes, of course. A machining center can perform various functions, such

6、as milling, boring, drilling, tapping and reaming. 丽莎：是的，当然。加工中心能执行各种功能，比如铣、镗、钻、攻螺纹和铰削。,.,10,David: Wow, its fantastic. I guess it must be very hard to operate machining centers. 大卫：哇，太神奇了。我猜加工中心肯定很难操作。 Lisa: Well, that depends. If you grasp the technology, you will find the machining center very ea

7、sy to operate. 丽莎：嗯，视情况而定。如果你掌握了技术，你会发现加工中心很容易操作。,.,11,Lisa, David and the other students continue their discussion. 丽莎、大卫和其他学生继续讨论。 David: Machining centers are so powerful. What are the other features of them? 大卫：加工中心如此强大。它们有什么其他功能？ Lisa: They can work over long periods of time without stopping. 丽

8、莎：他们不间断地工作很长时间。,Listen and repeat,.,12,David: Will they make mistakes if they work so hard? 大卫：如果它们过度运行会不会出错？ Lisa: Of course not. They can perform accurately even work for long hours. 丽莎：当然不会。就算运行很长时间它们也能准确执行操作。 David: How can the machining centers perform so many operations, such as milling, drill

9、ing, or boring? 大卫：加工中心怎样执行这么多的操作，比如铣、钻或镗？,.,13,Lisa: A machining center has many different cutters that are stored on a drum. And these cutters can be changed automatically. 丽莎：加工中心有很多不同的刀具储存在鼓形刀库。这些刀具能自动更换。 David: Thats very interesting. 大卫：那很有趣。,.,14,Machining centers are classified as vertical o

10、r horizontal. Both vertical and horizontal machining centers are widely used. Vertical machining centers are mainly used for flat parts or in mold and die work. Horizontal machining centers are used particularly with large, boxy, and heavy parts. 加工中心分为立式和卧式。立式和卧式加工中心都得到广泛应用。立式加工中心主要应用于平板零件和模具。卧式加工中

11、心特别是应用于大的、箱状的和重的零件。,The types of machining centers,.,15,How do you decide to choose vertical machining centers or horizontal machining centers? That depends on the part type, size, weight, and application. Sometimes you can also choose what you like. 你怎样决定选择立式或是卧式加工中心？这依赖于零件的类型、尺寸和应用。有时你也可以选择你喜欢的。 D

12、o you know how to operate machining centers? Now, the experts have given you some tips for it. 你知道怎样操作加工中心吗？现在，专家给你一些提示。 Tips for operating machining centers 操作加工中心的提示,.,16,Tip one Make preparation Select cutting tools and fixture Select cutting parameters 提示1 准备工作 选择刀具和卡器 选择切割参数 Tip Two Build reference Position Input the part program Bring the tool to the reference position a