“变速器换挡叉”零件的机械加工 工艺规程

机械制造课程设计说明书《变速器换挡叉》目录
一、零件分析··················································3
1.1零件的作用············································3
1.2零件的工艺分析········································3
1.3尺寸和粗糙度的要求····································3
1.4位置公差要求···········································4
二、毛坯的设计··············································4
2.1选择毛坯··············································4
2.2确定机加工余量、毛坯尺寸和公差··························4
2.3 确定机械加工加工余量·································4
2.4 确定毛坯·············································5
2.5 确定毛坯尺寸公差·····································4
2.6设计毛坯图············································4
三、选择加工方法，拟定工艺路线································6
3.1基面的选择············································6
3.2粗基准的选择··········································6
3.3精基准的选择··········································6
3.4制定机械加工工艺路线··································6
四、加工设备及道具、夹具、量具的选择···························14
五、确定切削用量·············································16
六、基本时间的确定··········································18
七、夹具设计···············································23
八、总结·····················································23