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您现在的位置: 木哥机械资料商城 >> 机械翻译类 >> CAD及CAM计算机辅助设计与制造
设计名称
  CAD及CAM计算机辅助设计与制造
设计编号
  A8-171
设计软件
  Word
包含内容
  WORD文档
说明书页数
  12页(中英文)
图纸数量
  机械翻译(无图)
推荐指数
  较好
价格:
  优惠中
整理日期
  2012,07,19
整理人
  小木
购买流程
  <点此查看如何购买本站设计>
设计简介

附录A译文
CAD/CAM计算机辅助设计与制造
计算机辅助设计(CAD)和计算机辅助制造(CAM)是使用数字计算机的,他们快速而精确,集中在完成从工程设计到产品制造的全过程。CAD/CAM是把数控技术和计算机技术集中组合在一起,从而引申演化而来的。通过公用数字型数据而组合并随着电子技术不断发展而充实起来。到如今数控和数字计算机已经达到比较成熟阶段,即两者的结合已将我们带到向往已久的自动化工厂的门槛。
CAD/CAM的计算机化的功能,归结起来有如下三个方面:
(1)设计/制图,即计算机辅助工程;
(2)计划/制定进度表,即信息管理系统;
(3)制造、制造自动化。
一个理想化的CAD/CAM系统,它表明用户如何经图象终端和计算机联系。利用公用数据库内存的信息从开始到结束来设计和控制制造的全过程。随着人机对话式的制图方式的问世,用户使用编码穿孔卡组成纸带卷将数据和指令输入计算机的问题就不复存在。用户不需要具有计算机编程和操作的经验也能使用机床。有了人机对话式制图,用户就可以用屏幕显示图形与计算机进行连续通讯,操作这些系统不要求具有计算机知识,而是在实时情况下与计算机进行沟通,即通过键盘和光笔或其他类似铅笔的装置和计算机交互作用,设计人员在显示屏幕上规定点和线等就可以很快构成屏幕显示的图形或模型,这其实是计算机数据库内所存储的图像的真实再现。
用笔划一下,或按一下按钮,设计人员就可以对整个或部分设计图样进行移动、放大、旋转、拷贝、修改、处理等。例如通过按一下按钮达到,设计人员就可以付出翻转指令而产生显示的镜像来制造对称零件或可利用平移指令来建立零件的模型,也可规定横截面,然后就进行线性平移以建立一个平面模型。同样,用一个横截面绕其中心轴旋转的旋转指令,也很容易就建立一个圆形零件模型。这些均利用了计算机可又快又好地重复动作的优点。
在设计完成之后,可利用计算机存储器内所存的最终集合数据来产生数控指令,以便在自动机床上制作零件,或建立一个印刷线路原图和钻孔纸带以便自动制作印刷电路卡片。现在许多CAD/CAM系统可以对某些类型不同的零件产生数控指令。可在屏幕上模拟刀具路线从而可较快地似的确认、检验和修改程序。
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附录B外文文献
CAD/CAM
Computer-aided design(CAD)and computer-aided manufacturing(CAM)use digital computers,with their high speed and accuracy,as the integrating force throughout the entire process from engineering design to product manufacture.CAD/CAM evolves from and brings together such technologies as numerical control and computer technology.Tied together by the common usage of digital data,and fed by a continuous stream of electronics developments,numerical control and the digital computer have reached the maturity to permit a level of integration that brings us to the threshold of the long-envisioned automatic factory.
The various computerized functions under CAD/CAM fall into three general areas:
1.Design/drafting,or computer-aide engineering.
2.Planning/scheduling,or management information systems.
3.Fabrication,or manufacturing automation.
A conceptualized or idealized CAD/CAM system is shows how the user interacts with the computer via a graphics terminal,designing and controlling the manufacturing process from start to finish with information stored in a shared data base.With the advent of interactive graphics,the problem of the user entering data and instructions into the computer with stacks of coded punched cards or reels of taps went away. No longer was the user required to be experienced in computer programming and operation to use the machine.With interactive graphics,the user communicates with the computer in display-screen pictures.No knowledge of computers is required to operate these systems,and the communication is in real time,which means that the computer’s response to the user’s instructions is almost instantaneous.In CAD/CAM,the requirement is for the solution of three-dimensional mechanical design and manufacturing problems.Interacting with the computer via keyboard and light pen or other pencil like devices,the designer specifics points and lines on the display screen to quickly construct a display-screen drawing or model.This is in reality the representation of the diagram stored in the computer data base.
With a stroke of the pen or by pushing a button,the designer can move,magnify,rotate,flip,copy,or otherwise manipulate the entire design or any part of it.For example.by pushing a button the designer may issue flip command to produce a mirror image of a display for modeling symmetrical parts,or a translate command may be used to create models for linear parts.A cross section may be defined and then translated linearly to create a surfaced model.In similar manner,circular parts can be easily modeled with a rotate command in which cross section is rotated about a central axis to model parts.These operations take advantage of the computer’s capability to repeat detailed operations quickly and flawlessly.
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