机械5

典型汽车零部件的CAM编程（曲面） 摘要 随着现代汽车产业的不断发展，对汽车零件制造领域的要求也越来越高，特别是在复杂零件的曲面这一块，而计算机技术的飞速发展，给传统的制造业带来了巨大的变革，CAD/CAM技术是利用计算机来帮助人们完成产品的设计和制造的新技术，是在零件生产中综合应用的新飞跃。本文的主要目的就是通过使用现代主流CAD/CAM软件对典型的汽车零部件——叶轮，解决曲面造型的难题和编程困难。工艺分析之后选择合适的加工方式，计算出合适的加工参数等等，最终对其编程。反复仿真对比得出最好的工艺路线之后输出NC程序，并在最后提出一些加工程序的输出时的注意事项。通过这样的方式，能使汽车水泵叶轮使用寿命更持久，相比塑料的叶轮在各方面的性能也更优越。 关键词：CAD/CAM技术；数控仿真加工；曲面；汽车零部件 CAM programmi
ng for typical automotive compo
ne
nts(surface) ABSTRACT With the developme
nt of the moder
n automobile i
ndustry, the auto parts ma
nufacturi
ng i
ndustry are i
ncreasi
ngly high requireme
nts, especially i
n parts of the complex curved surface of this block, a
nd the rapid developme
nt of computer tech
nology, has brought great cha
nges to the traditio
nal ma
nufacturi
ng i
ndustry, the CAD/CAM tech
nology is the use of
new tech
nology to the computer to help people complete the desig
n a
nd ma
nufacturi
ng the product,which is a
new leap i
n the comprehe
nsive applicatio
n of parts i
n productio
n. The mai
n purpose of this paper is based o
n the typical automobile parts-- impeller usi
ng moder
n mai
nstream CAD/CAM software, to solve the problem of difficult surface modeli
ng a
nd programmi
ng. Process a
nalysis after selecti
ng the suitable processi
ng method, calculate the appropriate processi
ng parameters a
nd so o
n, ultimately its programmi
ng. After repeated simulatio
n compari
ng process the best output NC program, a
nd puts forward some processi
ng program output matters
needi
ng atte
ntio
n. I
n thisway, it ca
n make the automobile pump impeller service life lo
nger, compared to the performa
nce of plastic impeller，it is superior i
n all aspects. Keywords: CAD/ CAM tech
nology; CNC machi
ni
ng simulatio
n; surface; Auto Parts 目录 一、绪论1 1.1曲面造型技术的发展及现状1 1.2曲面加工设备的发展和现状2 1.3 CAD/CAM技术的发展3 1.4课题的研究内容4 1.5课题研究的意义5 1.6国内外叶轮数控加工研究现状5 二、叶轮曲面编程工艺分析7 2.1叶轮的主要分类7 2.2叶轮的叶片分类9 2.3叶轮工作原理9 2.4零件图工艺分析10 2.5加工工艺分析11 2.6工艺卡片12 三、叶轮的三维CAD构建要素确定15 3.1 UG软件介绍15 3.2叶轮实体图16 3.3叶轮的建模16 3.4小结20 四、叶轮的数控加工编程及仿真验证21 4.1 UG的CAM模块21 4.2零件的材料对加工参数的确定21 4.3 UG/CAM加工仿真22 4.3.1初始化加工环境22 4.3.2创建程序节点22 4.3.3创建加工几何体24 4.3.4创建加工操作25 4.5小结33 五、程序输出的要点34 5.1后置处理34 5.2各工序的加工程序35 5.3程序检查和添加注释信息38 5.4输出NC程序和工艺文件夹38 5.4本章小结39 结论40 致谢41 参考文献42