小型冲压件冲孔翻孔复合模结构设计

Structure design of piercing-flanging compound die for small size stamping parts

主要介绍了一种小型冲压零件冲孔、翻孔复合模具的结构设计及其工作原理,通过在下模中增加包含驱动杆、驱动块及回程弹簧等部件的内部切换结构,实现了冲孔凹模套工作状态随模具逐渐闭合而可切换,从而在一副模具中同时完成预冲孔及翻孔2道工序。该冲翻孔复合模具结构紧凑,单序工作内容增多,与普通钢板模具相比,减少了模具工序数,提高了翻孔同心度,达到了提高生产效率、降低模具开发成本及后期生产成本的目的。此外,内部切换机构也可以起到顶料作用,提高了取件的操作方便性。

The structure design and working principle of piercing-flanging compound die for small size stamping parts were mainly intro- duced. By adding internal switching mechanism including driving rod, driving block and return spring etc. in the lower die, the work state of piercing die could be switchable with the die closed gradually. So the pre-piercing and flanging processes completed in the same die at the same time were realized. The structure of piercing-flanging compound die was more compact, and it could tackle more work within a single sequence. Compared with the ordinary steel plate die, the compound die could reduce the number of processes, improve flanginghole concentricity, realize high efficiency, and save costs in die development and later production. In addition, the internal switching mechanism could also play the role of ejection part, which improves the convenience of picking up.