滑轮的工艺规程及车Φ30H8孔夹具设计 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。 滑轮加工工艺规程及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、滑轮、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 第一章机床夹具介绍2 1.1夹具的现状及生产对其提出新的要求2 1.2现代夹具的发展方向3 第二章零件的分析5 2.1零件的作用5 2.2零件的工艺分析5 第三章工艺规程设计6 3.1确定毛坯的制造形式6 3.2基面的选择6 3.3制定工艺路线8 3.4机械加工余量、工序尺寸及毛坯尺寸的确定9 3.5确定切削用量及基本工时10 第四章机床夹具的定位及夹紧19 4.1概述19 4.1.1机床夹具的概念19 4.1.2机床夹具的组成19 4.1.3机床夹具的分类20 4.1.4机床夹具在机械加工中的作用22 4.2工件的装夹方式23 4.3基准及其分类24 4.4工件的定位26 4.4.1工件定位的基本原理26 4.4.2常见定位方式及定位元件27 4.5工件的夹紧28 4.5.1夹紧装置的组成及基本要求28 4.5.2夹紧力的确定29 第五章夹具设计31 5.1问题的提出31 5.2定位基准的选择31 5.3切削力和夹紧力的计算33 5.4定位误差分析33 5.5夹具设计及操作的简要说明34 总结35 致谢37 参考文献38