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。 空气压缩机曲轴的工艺设计和车外圆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：切削用量夹紧定位误差。 Abstract This 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1 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 3.3制订工艺路线5 3.4机械加工余量的确定7 3.6确定切削用量及基本工时8 第4章夹具设计30 4.1问题的提出30 4.2定位基准的选择30 4.3定位元件的设计30 4.4定位误差分析31 4.5切削力的计算与夹紧力分析33 4.6夹具设计及操作简要说明34 谢辞35 参考文献36