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。 后摇臂座的加工工艺规程和钻后摇臂座Φ4孔的工艺设计、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：切削用量；夹紧；定位；误差 Abstract The desig
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ng; error 目录 摘要I 第1章绪论1 1.1课题背景1 1.2目的1 1.3夹具设计中的特点1 1.4夹具设计需保证的条件2 1.5夹具的发展趋势2 第2章零件的分析3 2.1零件的作用3 2.2零件的工艺分析3 第3章工艺规程设计4 3.1确定毛坯的制造形式4 3.2基面的选择4 3.2.1粗基准的选择4 3.2.2精基准的选择5 3.3制订工艺路线6 3.4机械加工余量的确定6 3.5确定切削用量及基本工时10 第4章专用夹具设计27 4.1问题的提出27 4.2定位基准的选择27 4.3定位误差分析27 4.4切削力的计算与夹紧力分析28 4.5夹具设计及操作简要说明29 参考文献30 结束语31 心得体会32