机械5

摘要 连接座零件加工工艺及钻床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：工艺，工序，切削用量，夹紧，定位，误差 Abstract Parts a
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ng 目录 摘要I 一、零件的分析1 1.1零件的作用1 1.2零件的工艺分析1 二、确定生产类型1 三、确定毛坯2 3.1确定毛坯种类2 3.2确定毛坯加工余量及形状2 四、工艺规程设计2 4.1选择定位基准3 4.2制定工艺路线3 4.3机械加工余量及公差的确定4 4.3.1外圆加工表面及端面4 4.3.2两孔的加工余量6 4.3.3确定切削用量及时间定额6 五、钻床夹具设计13 5.1问题的提出13 5.2夹具的设计13 5.2.1定位基准选择13 5.2.2切削力及夹紧力计算13 5.2.3定位误差分析14 5.2.4夹紧元件的选择15 5.2.5夹具设计及操作的简要说明16 5.2.6钻床夹具的装配图见附图16 参考文献17