机械5

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。 减速器箱体零件的工艺规程及其加工￠52H8孔的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 中文摘要…………………………………………………………………………………Ⅰ 英文摘要……………………………………………………………………………Ⅱ 第一章工艺设计…………………………………………………………………………1 1.1零件分析…………………………………………………………………………1 1.2毛坯的选择与设计及基准的确定…………………………………………………1 1.3工艺规程的设计…………………………………………………………3 第二章工序设计…………………………………………………………………6 2.1工序尺寸与毛坯尺寸的确定………………………………………………………6 2.2设备和工艺装备的选择……………………………………………………………7 2.3切削用量与时间定额…………………………………………………………9 第三章专用夹具的设计……………………………………………………………15 3.1夹具的设计………………………………………………………………15 3.2夹紧装置的组成及设计要求……………………………………………………16 3.3镗模导向装置的设计…………………………………………………………17 3.4切削力与夹紧力的计算………………………………………………………19 3.5定位误差的分析………………………………………………………………24 3.6夹具设计与操作的简要说明………………………………………………25 3.7夹具结构设计的分析与改进………………………………………………26 第四章总结………………………………………………………………27 参考文献……………………………………………………………………………29 致谢…………………………………………………………………………………30