为了研究6016铝合金热冲压的回弹现象,利用V型冲压模具对6016铝合金进行不同工艺参数条件下的热冲压实验.为了进一步分析回弹机理,建立了有限元模型并验证了其准确性.研究了板料初始温度、压边力、保压压力和模具圆角对回弹的影响.结果表明,当板料初始温度上升到500℃时,回弹显著下降.增大保压压力和减小模具圆角同样也可以降低回弹.在不同的板料初始温度下,压边力对回弹的影响是不同的.此外,冲压过程中V型件侧壁的先弯曲后校直会导致负回弹.%Springback behavior of 6016 aluminum alloy in hot stamping was investigated by a series of experiments under different conditions using V-shape dies and a finite element model which was validated reliable was used to further elucidate the springback mechanism. The effects of initial blank temperature, blank-holding force, die closing pressure and die corner radius were studied. It is found that springback decreases remarkably as the initial blank temperature rises up to 500 ℃. The springback also reduces with the increase of die holding pressure and the decrease of die corner radius. Under different initial temperatures, the influence of blank-holding force is distinct. In addition, the bending and straightening of the side wall during the stamping process is found to interpret the negative springback phenomenon.
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