为了研究VPF工艺对铝合金覆盖件成形过程中回弹的影响,对VPF工艺成形过程中铝合金双曲率覆盖件的回弹特征进行了数值模拟和实验研究,并且与传统刚模成形零件的回弹特征进行了对比.研究结果表明：VPF工艺成形的铝合金双曲率覆盖件的回弹过程中同时存在正、负回弹现象,而传统刚模成形的零件回弹过程中只存在正回弹,并且VPF工艺成形的铝合金双曲率覆盖件大部分区域的回弹量小于传统刚模成形的零件;随着成形深度的增加,VPF工艺成形的铝合金双曲率覆盖件正回弹降低,负回弹量增加.
To research the effects of viscous pressure forming (VPF) process on springbac panel, the springback of double-curved panel formed by the VPF process was investigated k of aluminum alloy by using numerical simulation and experimental methods. The springback characteristic of the panel by VPF was analyzed and compared with that of panel by stamping. The results show that the positive and negative springback occur by VPF, however,it is only the positive springback occurs by stamping. Furthermore, the springback value of VPF formed panel is smaller than that of panel formed by stamping. With the increasing of panel depth, the value of positive springback decreases and the value of negative springback increases.
参考文献
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