一次弯曲负角冲压成形工艺与模具设计

Technology and die structure of one-time negative angle bending stamping process

冲压件上的一些特殊结构给冲压生产带来困难,弯曲负角(小于90°的角度)就是其中之一。本文通过改进模具结构,在弯曲凸模上增加了可以转动的活动凸模,转动凸模与模具开合动作过程相配合,完成负角的弯曲过程。将传统的、必须经过两次弯曲才能成形的负角,改为一次弯曲成形,简化了成形工序,降低了生产成本,提高了生产效率,获得了良好的效果。

The structure of die has been improved in the text. By adding moving convex die onto the bending convex die, the negative angle has been bent. The traditional negative angle can be formed by twice bending process. The new one-time bending process for negative angle can simplify the forming steps and reduce the production cost, which obtains some good effects.