基于压边力控制方盒形件拉深成形的数值模拟

Numerical Simulation of Deep Drawing of Square Box Part Base on Controlling Blank Holder Force

板料拉深成形的起皱和破裂是拉深成形工件常出现的主要成形缺陷。通过压边圈对板料施加一定的压边力是控制板料塑性流动的有效方法。利用有限元数值模拟方法,在整体压边圈方式、不同的恒定压边力及变压边力加载模式下模拟方盒形件拉深成形材料流动情况。从模拟结果看出:在变压边力加载下,方盒形件拉深成形结果比恒定压边力下的理想。通过压边圈对板料施加变压边力是控制板料塑性流动的一种有效方法,可以抑制板料起皱和延缓破裂以及提高拉深件成形性能。

The wrinkling and fracturing of sheet deep drawing deforming are major deforming defects of deep drawing part. It is an effective way to control sheet plastic flow through applying blank holder force on blank holder. Applying finite element simulation method, under single -piece blank holder mode, different constant blank holder force and variable blank holder force, the material flow situations of square box part deep drawing were simulated. The simulation results show under variable blank holder force, the re- sult of square box part deep drawing deforming is better than that of under constant blank holder force. It is an effective way to control sheet plastic flow through acting variable blank holder force on blank holder. It can inhibit wrinkle and delay fracturing of sheet and im- prove the performance of square box part deep drawing.