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。 轮毂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：轮毂；工艺；车外圆；夹具设计；切削用量；夹紧；定位 Abstract This desig
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ng 目录 摘要I Abstract II 第1章绪论1 1.1前言1 1.2机械加工工艺规程制订1 1.3机械加工工艺规程的组成1 1.4制订机械加工工艺规程的原始资料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章车床夹具设计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30 4.5切削力的计算与夹紧力分析31 4.6夹具设计及操作简要说明31 谢辞32 参考文献33