目录一、三维建模...............................................................................................................................1（一）螺钉实体建模................................................................................................................................1（二）钻模三维装配图............................................................................................................................1二、绘制零件图...........................................................................................................................2（一）螺钉零件图....................................................................................................................................2（二）钻模装配图....................................................................................................................................2三、零件加工工艺分析及工艺制订...........................................................................................3（一）零件工艺分析................................................................................................................................3（二）拟定加工方案................................................................................................................................3（三）机床的选择....................................................................................................................................3（四）夹具的选择....................................................................................................................................4（五）毛坯的选择....................................................................................................................................4（六）刀具的选择....................................................................................................................................4（七）切削用量的选择............................................................................................................................4（八）制订工艺文件.......................................................................