第十三讲：CAD and CAMppt课件.ppt

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1、第十三讲：CAD and CAM制作人：姚薇Huaian College of Information Technology2022-5-20第十三讲：第十三讲：CAM 和和CAD The term CAD is a shortening of Computer-Aided Design (CAD) ；The term CAM is a shortening of Computer-Aided Manufacturing (CAM)计算机辅助制造计算机辅助设计Compurt Adide InstructionComputer-Aided Management计算机辅助管理，计算机辅助j教学，2

2、022-5-20第十三讲：第十三讲：CAM 和和CAD The general CAD system was developed by considering a wide range of possible uses of such a system.在开发通用CAD 系统时要考虑该系统应具有尽可能广的应用范围。动画和图形设计The following were considered in detail:(1) Mechanical engineering design机械工程设计(2) Building design建筑设计(3) Structural engineering design

3、结构工程设计(4) Electronic circuit design电子电路设计(5) Animation and graphic design2022-5-20第十三讲：第十三讲：CAM 和和CAD It was postulated that four basic processes involving graphics occurred, to various degrees, in each field, namely:(1) Pure analysis - standard design and analysis processes.(2) Pure draughtingprodu

4、ction of a drawing or picture by the manual creation and manipulation of lines, arcs, etc.在各个领域，不论其应用程度如何，包括作图在内都应该具有4个基本过程，即：(1) 纯分析标准设计和分析过程；(2) 纯绘图用手工画线、圆弧等绘出的图或画；2022-5-20第十三讲：第十三讲：CAM 和和CAD (3) Drawing by analysisthe production of a picture or part of a picture directly from analysis: for examp

5、le, production of cam profiles.(4) Analysis of drawingevaluation of the properties of an item described graphically, for example the production of a quantity list by analysis of a builders plan drawing.(3) 分析作图直接分析的方法产生一副图或图的一部分，例如作凸轮轮廓图；(4) 绘图分析对用图形方式描述的一个项目进行特性评估，如通过对建筑师规划图的分析， 得出该项目的工程量表。2022-5-2

6、0第十三讲：第十三讲：CAM 和和CAD 1 However, the range of graphical construction techniques is so large in practice that the system contained only as many facilities as could practically be incorporated in the draughting system, leaving other more specialized techniques to be developed by the applications progra

7、mmer. 然而由于实际的制图技术范围太广，作图系统只能尽可能多地将实用工具包含进去，而将其他更专门的技术留给应用程序员去开发。2 It is also essential that graphic data can be annotated in a way which is recognized by analysis programs but which does not affect the draughting system.另外，图形数据可用能被分析程序识别但不对作图系统产生影响的方法进行注释。2022-5-20第十三讲：第十三讲：CAM 和和CAD 3 The solid mod

8、eling created in CAD can be transferred to a Finite Element Analysis (FEA) program, which will then verify whether the suggested design will be capable of supporting the expected loads. 在CAD 里创建的实体造型可以输入到一个有限元分析(FEA)程序内，以检验设计方案能否承受预期的负荷。4 Furthermore, at least in the case of single-parts manufacturi

9、ng, processes like design and process planning can be regarded as elements of the lead time of an order and therefore can be planned and controlled by the PPC system in the same way as the actual manufacturing and assembly processed. In that case a corresponding feedback becomes necessary. 此外，至少在加工单

10、件零件的情况下，诸如设计和工艺规划这样的过程可以认为是订单交付周期的一部分。因此，它们可以像实际加工和装配过程一样由PPC 系统规划和控制。在这种情况下，相应的反馈就变得非常必要。2022-5-20第十三讲：第十三讲：CAM 和和CAD 1. Translate the following into Chinese.One difficulty is that almost all of what is called behavioral science continues to trace behavior to states of mind, feelings, traits of cha

11、racter, human nature, and so on.(2) If the small hot spots look as expected, that will be a triumph for yet another scientific idea, a refinement of the Big Bang called the inflationary universe theory.(3) I am going to be tested for a driving licence for the fourth time after three times of failure

12、s.(4) Many thanks for your sending next years catalogue and price list to us.(5) We are looking forward to your early reply.(6) I was most upset to learn that Tom kicked his ball through your kitchen window again this morning.2022-5-20第十三讲：第十三讲：CAM 和和CAD 2. Translate the following into English.尽管电子计算机有许多优点，但是它们不能进行创造性工作， 也不能代替人。(2) 石油供应可能会随时中断。不管怎样，以目前这种消费速度， 只需30 年左右，所有的油井都会枯竭。(3) 再者，显而易见的是一个国家的经济实力与其工农业生产效 率密切相关，而效率的提高则依赖于各种科技人员的努力。(4) 在10 月9 日的中国日报上看到贵公司招聘电气工程师的广告， 于是向您申请这一职位。(5) 随函寄奉各种货品的样本和最新价目表。(6) 请给我介绍一下你们系并寄一份入学申请表好吗？