摘要 本次设计内容涉及了机械制造工艺及机床夹具设计、金属切削机床、公差配合与测量等多方面的知识。 减速器箱体加工工艺规程及镗孔夹具设计是包括零件加工的工艺设计、工序设计以及专用夹具的设计三部分。在工艺设计中要首先对零件进行分析，了解零件的工艺再设计出毛坯的结构，并选择好零件的加工基准，设计出零件的工艺路线；接着对零件各个工步的工序进行尺寸计算，关键是决定出各个工序的工艺装备及切削用量；然后进行专用夹具的设计，选择设计出夹具的各个组成部件，如定位元件、夹紧元件、引导元件、夹具体与机床的连接部件以及其它部件；计算出夹具定位时产生的定位误差，分析夹具结构的合理性与不足之处，并在以后设计中注意改进。 关键词：工艺、工序、切削用量、夹紧、定位、误差。 ABSTRCT This desig
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n, the error 目录 序言1 一零件分析2 1.1零件的作用2 1.2零件的工艺分析2 二工艺规程设计3 2.1确定毛坯的制造形式3 2.2基面的选择3 2.3制定工艺线路5 2.4确定切削用量8 三镗孔夹具设计19 3.1概述19 3.1.1机床夹具的概念19 3.1.2机床夹具的组成19 3.1.3机床夹具的分类20 3.2问题的提出22 3.3定位基准的选择22 3.4工件的定位24 3.4.1工件定位的基本原理24 3.4.2常见定位方式及定位元件25 3.5工件的夹紧26 3.5.1夹紧装置的组成及基本要求26 3.5.2夹紧力的确定27 3.5.3典型夹紧结构28 3.5.4定心夹紧机构28 3.3切削力及夹紧力的计算29 3.4定位误差分析30 3.5夹具设计及操作的简要说明31 总结34 致谢35 参考文献36