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。 滑块的加工工艺规程和钻、攻M8螺纹孔的工艺设计、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：滑块，加工工艺，专用夹具，定位元件，夹具体 Abstract The desig
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n a special fixture, the fixture selectio
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ncrete 目录 前言1 第1章概述发展2 1.1机床夹具简介2 1.1.1机床夹具的主要功能2 1.1.2机床夹具的组成2 1.1.3夹具设计的步骤和基本要求2 第2章加工工艺规程设计8 2.1轴承套的作用8 2.2零件的工艺分析8 2.3基面的选择8 2.3.1粗基准的选择原则8 2.3.2精基准选择的原则9 2.4制定工艺路线9 2.5确定各工序的加工余量、计算工序尺寸及公差10 2.6确定切削用量及基本工时12 第3章专用夹具设计25 3.1问题提出25 3.2定位基准的选择25 3.3定位元件的设计25 3.4定位误差分析25 3.5切削力的计算与夹紧力分析26 3.6夹具设计及操作简要说明27 结束语28 谢辞29 参考文献30