Stamping conditions of the stretching die
Stamping conditions of the stretching die: Excessive blank holding force. When the edge pressing force is too large, wrinkling will not occur on the flange surface. The roughness of the anti wrinkle pressure plate surface, mold fit, gap, rp, rd, type and coating conditions of processing oil, and the distribution of the edge holding force caused by the buffer pin all affect the anti wrinkle pressure. If all of the above conditions for deep drawing are appropriate, the blank holder force will decrease and rupture will not occur before wrinkling. When the edge pressing force is too large, it is easy to determine because the flange surface will be fully illuminated.
2023-02-17