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n. 目录 1压紧盖的机械加工工艺分析及生产类型的确定1 1.1压紧盖的技术要求1 1.2审查压紧盖的工艺性： 1 1.3确定压紧盖的生产类型： 1 2确定毛坯、绘制毛坯简图2 2.1选择毛坯2 2.2确定毛坯的尺寸公差和机械加工余量2 2.3绘制压紧盖铸造毛坯简图3 3拟定压紧盖工艺路线4 3.1拟定压紧盖工艺路线4 3.2表面加工方法的确定4 3.3加工阶段的划分5 3.4工序的集中与分散5 3.5工序的安排5 3.6确定工艺路线6 4加工余量、工序尺寸和公差的确定7 5切削用量的计算8 5.1钻孔工步8 5.2粗铰工步8 5.3精铰工步8 6夹具设计9 6.1设计要求9 6.2确定工件的定位方案9 6.3确定刀具的对刀或引导方式9 6.4确定工件的夹紧方案9 7参考文献(不少于5篇) 11