定位销夹具课程设计(含工艺卡和指定工序的工序卡+全套图纸).doc

摘 要 关键词： 目 录4.1 粗基准的选择···············································································4 4.2 精基准的选择···············································································4 4.3 工艺过程······················································································5 第 5 章 指定工序夹具方案设计和有关计算·····································8 5.1 选择定位基准 ···········································································8 5.3机械加工余量、工序尺寸及毛坯尺寸的确定····································8 5.4 切削用量的确定·········································································8 5.5确定设计方案············································································10 5.6 选择定位元件，设计定位方式····················································11 5.7 铣削力、夹紧力的计算······························································12 5.8 定位误差计算··········································································13 结 论··························································································14 参考文献···························································································15 心 得···························································································16  第1章 零件分析 本次专业课程设计的零件是定位销，该定位销的零件图如下： 题目所给的零件是定位销，定位销的主要作用是用来固定零件之间的相对位置，起定位作用，也可以用于轴与毂的连接，定位销传递的载荷不大，还可以为安全装置中的过载尖端元件。 定位销的加工，要求表面光滑些好，硬度不用太高的，精度要求高一些，从零件图上可以看出：该零件表面粗糙度要求较高，表面粗糙度最高的是Φ16g6的圆柱表面，达到0.8Ra 。从图中的标注可以看出定位销的底部锥度允许圆跳动范围为0.02，A基准。 第2章 生产类型及批量的确定 由零件的工作状况及功能可知，销所起固定的作用，所以要求销有较高的的强度和抗冲击能力，故可选该零件的材料为T10，模锻。模锻用于零件成批生产，由于零件年生产量较大，而且零件的轮廓尺寸不大，所以选用模锻即能保证零件件的尺寸要求，又能提高劳动生产效率，降低劳动强度，这从提高生产率和保证加工精度上考虑都是符合要求的。 第3章 毛坯的确定 1．主要平面：销的2个端面。 2. 主要斜面：上端2个成10°的对称斜面。 3．主要孔：Φ10孔因为孔径相对比较大，且该零件是大批量生产，因此选择钻铰出孔，Φ5的斜孔也使用钻铰出孔。 根据以上分析，可以确定该零件各个需要加工的表面和孔的加工余量并设计相应的工序尺寸，得出该零件的毛坯零件合图如下： 如有需要请联QQ510280914 I 1