CA6140车床的型号831002拨叉零件的机械加工工艺规程及夹具设计

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目 录

序言······························································2 CA6140车床的型号831002拨叉工艺规程设计

一.拨叉的工艺分析及生产类型的确定·································2 1.拨叉的用途···················································3 2.拨叉的技术要求···············································3 3.审查拨叉的工艺性·············································4 4.确定拨叉的生产类型···········································4 二. 确定毛坯,绘制毛坯简图·········································4 1.选择毛坯······················································4 2.确定毛坯的尺寸公差和机械加工余量······························5 三.拟定拨叉工艺路线···············································5 1. 基面的选择···················································5 2.表面加工方法的确定表面加工方法的确定··························6 3.加工阶段的划分················································6 4.工序的集中与分散···············································6 5.确定拨叉的生产类型············································6 6.工艺路线的确定················································7 四．机械加工余量、工序尺寸及公差的确定·······························8 五. 拨叉φ60孔切削用量、时间定额的计算·······························9 1.切削用量计算····················································10 2.时间定额的计算·················································10 六．机床夹具设计·····················································12 1.设计应考虑的问题················································12 2.定位方案设计····················································13 3. 工件误差分析计算···············································13 4. 导向元件设计···················································14 5.夹紧装置设计····················································14 6夹紧力与切削力的计算·············································16 7.夹具体的设计·····················································16

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