1 前 言.................................................................................................................................................................1
2 选题背景.............................................................................................................................................................1
2.1 题目来源.................................................................................................................................................1
2.2 目的和意义.............................................................................................................................................1
2.3 解决的主要问题.....................................................................................................................................2
2.4 国内外现状.............................................................................................................................................3
2.5 发展趋势..................................................................................................................................................3
3 过程论述.............................................................................................................................................................4
3.1 加工工艺设计.........................................................................................................................................4
3.2 数控铣床加工夹具与刀具的设计.........................................................................................................4
3.3 数控铣床加工走刀路线的设计.............................................................................................................4
3.4 切削用量的分析.....................................................................................................................................5
3.5 工艺设计.................................................................................................................................................5
4 灯罩凸模设计说明............................................................................................................................................6
4.1 绘制灯罩凸模..................................................................................................................................................6
4.1.1 绘制线架构...................................................................................................................................6
4.1.2 绘制三维实体模型......................................................................................................................8
4.2 加工刀具路径的规划..............................................................................................................................9
4.2.1 确定加工坯料对刀点...................................................................................................................9
4.2.2 工件参数的设定........................................................................................................................10
4.2.3 规划曲面挖槽粗加工刀具路径（预留量 0.5）......................................................................11
4.2.4 曲面挖槽粗加工实体加工模拟................................................................................................16
4.2.5 曲面挖槽粗加工刀具路径的规划，将模具靠面加工到位.....................................................17
4.2.6 曲面等高外形精加工刀具路径的规划....................................................................................22
4.2.7 规划曲面陡斜面精加工刀具路径............................................................................................27
4.3 生成加工 NC 代码及传输程序 ...........................................................................................................31
4.3.1 生成 NC 代码 ............................................................................................................................31
4.3.2 传输 NC 程序 ............................................................................................................................33
5 总结..................................................................................................................................................................34
致 谢..................................................................................................................................................................36
附 录（一）........................................................................................................................................................37
附 录（二）........................................................................................................................................................40
