机械5

拨叉零件的机械加工工艺规程制订及钻扩铰Φ15孔夹具设计 目录 一、课程设计的题目···································1 二、课程设计时间·····································1 三、课程设计的目的及其要求···························1 3.1课程设计的目地·······························1 3.2课程设计的要求······························1 四、设计内容·········································2 4.1零件的工艺分析·······························2 4.2零件的工艺要求································3 4.3毛坯设计······································3 4.4选择加工方法，拟定工艺路线····················4 4.5切削用量的选择及基本工时······················5 五、钻扩铰15孔夹具设计·····························14 5.1夹具的夹紧装置和定位装置·····················14 5.2切削力及夹紧力的计算·························15 5.3夹具的导向···································17 5.4定位方案分析与比较···························18 5.5钻孔与工件之间的切屑间隙······················20 5.6钻模板········································21 5.7定位误差的分析······························21 5.8钻套、衬套、钻模板设计与选用··················21 5.9确定夹具体结构和总体结构·······················23 5.10夹具设计及操作的简要说明·····················24 六、心得体会··········································24 七、参考文献··········································24