机械5

某型机摇臂零件的加工工艺及钻右端Φ9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。 某型机摇臂的工艺规程及其钻、粗铰、精铰右端Φ9孔的工装夹具，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：某型机摇臂、夹具设计、定位误差 Abstract The desig
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ng error 目录 摘要I Abstract II 第1章绪论1 1.1引言1 1.2机械加工工艺规程的作用1 1.3研究方法及技术路线2 1.4课题背景及发展趋势3 1.5钻床夹具简介4 第2章工艺规程设计9 2.1毛坯的制造形式9 2.2零件分析9 2.3基面的选择10 2.3.1粗基准的选择原则10 2.3.2精基准选择的原则10 2.4制定工艺路线11 2.5确定各工序的加工余量11 2.6确定切削用量及基本工时13 第3章钻床夹具24 3.1定位机构24 3.2夹紧机构24 3.3定位误差26 3.3.1定位误差26 3.3.2产生定位误差的原因26 3.3.3定位误差的计算27 3.4绘制夹具装配图28 3.5机床夹具的总体形式29 致谢31 参考文献32