冷冲模具毕业设计说明书 22p

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1、**职业技术学院毕业设计说明书题目:托扳冷冲模具设计系部:班级:姓名:指导教师:完成日期:目录毕业设计(论文)任务书·································1主要参考资料·········································3一.冲压件的工艺分析··································4二.确定冲压工艺方案····································41)工艺性质的确定······································42)工序数量的确

2、定······································53)工序顺序的安排······································64)工序定位基准和定位方式的选择························7三.冲压工艺计算·······································91)坯料尺寸计算、排样及裁板方式的经济性分析，材料的利用率计算··············································92)冲压工艺计算及设备的选择···················

3、······103)模具压力中心的计算·······························124)弹性元件的选用与计算······························125)凸、凹模工作部分尺寸及公差的确定···················14四.模具设计············································171)凹模的设计········································172)凸凹模的设计······································193)冲孔

4、凸模··········································204)卸料装置的选择····································225)模架的选取········································236)上垫板··········································257)下垫板············································268)冲孔凸模固定板···································26

5、9)空心垫板··········································2710)凸凹模固定板····································3111)卸料板··········································33总图·········································33六.总结··········································38主要参考文献：《冷冲压模具设计指导》，王芳主编《冷冲模设计》，丁松聚主编《冷冲模具设计及制造》，

6、高鸿庭、刘建超主编《冷冲模国家标准》GB2873-81《模具设计与制造简明手册》《冷冲压模具结构图册》一、冲压件的工艺分析1.零件材料:08F钢强度、硬度很低，而塑性、韧性极高，具有良好的冷变形性和焊接性，正火后切削加工性尚可，退火后导磁率较高，剩磁较少，但淬透性、淬硬性极低。08F钢的塑性很好，主要用来制造冷冲压件。锰的在钢中起到增加弹性强度的作用，因此在符合要求的情况下，含量可以有偏差。2.工件结构:该零件形状简单,结构对称.依零件图知该零件为一般冲裁,冲孔,落料件.无尖角,直线与尖角的圆角大于1.即可保证了大于凸凹模正常合理制造生产,又可以提高了凹模具的寿命,同时

7、孔边距远大于凸凹模允许的最小避厚.这是达到了合理安全的冲裁要求。3.尺寸精度:根据零件图上孔边距6.5mm.该工件按图纸所示无尺寸公差要求属于自由尺寸.均按IT14级确定工件的公差属于.一般冲裁均能满足其尺寸精度要求.查<<公差配合与技术测量>>附录A标准公差数值(GB/T1800.3-1998)表得各个尺寸公差为;孔4-Φ3.5+0.030mm;外形300-0.52mm;380-0.62mm;580-0.74mm;R80-0.36mm，孔距17+0.620mm；14+0.620mm。4．经济方面，从生产要求来看该工件的生产量为月产120