目  录

1 拨叉…………………………………………………………………………….6

1.1拨叉的概述………………………………………………………………….6

1.2拨叉的工艺分析……………………………………………………………6

1.3拨叉的工艺规程设计………………………………………………………7

1.3.2定位基准..................................................8

1.3.3制定工艺路线..............................................8

2确定切削用量及基本工时.........................................10

3专用夹具设计...................................................12

3.1设计主旨....................................................12

3.2夹具设计....................................................12

3.2.1定位基准的选择...........................................12

3.2.2切削力和夹紧力的计算.....................................12

3.2.3定位误差分析.............................................13

3.2.4夹具设计及操作的简要说明.................................14

4方案综合评价与讨论.............................................15

5体会与展望.....................................................16