右弯钳零件的加工工艺及镗两孔夹具设计 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。 右弯钳零件工艺规程及其粗镗、精镗2-Φ78.6孔、2-Φ91环形槽的工装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：右弯钳;夹具设计;加工;工序;基准;工艺路线 Abstract This desig
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ng; process; datum; process route 目录 摘要1 Abstract 2 第一章概述发展3 1.1机床夹具的主要功能3 1.2机床夹具的组成3 1.3夹具设计的步骤和基本要求3 1.3.1夹具设计的基本要求3 1.3.2夹具的设计步骤4 1.3.3夹具总图上尺寸、公差与配合和技术条件的标注5 1.3.4夹具体设计7 第二章工艺规程设计9 2.1右弯钳零件9 2.2右弯钳零件的工艺分析9 2.3基准的选择9 2.3.1粗基准的选择原则9 2.3.2精基准选择的原则10 2.4制定工艺路线10 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11 第三章专用夹具设计32 3.1问题的提出32 3.2定位基准的选择32 3.3夹紧说明32 3.3.1夹紧机构32 3.3.2切削力和夹紧力计算33 3.4定位误差分析34 3.5镗套的设计35 3.7绘制装配图40 结束语42 谢辞43 参考文献44