锻压技术

冲压速度对双相钢B340/590DP拉深成形性能的影响

英文标题：Effect of stamping speed on drawing performance of dual-phase steel B340/590DP

分类号：

出版年,卷(期):页码：2016,41(7):109-113

摘要：

运用数值模拟和拉深实验研究了不同冲压速度对双相钢B340/590DP板材拉深极限系数的影响。数值模拟显示，随着冲压速度由10 mm·s-1增加到60 mm·s-1，0.8 mm厚的板料减薄率由11.473%增大到16.638%。相同工艺参数的伺服压力机对板料进行拉深实验的结果表明，冲压速度大于60 mm·s-1时，易在成形中出现拉裂现象，数值模拟有限元模型得到的成形极限性能与实际拉深实验数据有较好的一致性。对滑块的运动速度轨迹进行控制的拉深成形模式下，拉深深度超过10 mm时再调高冲压速度，可以减少拉裂、起皱等缺陷。在伺服压力机的使用中合理地设置初始和后续成形速度，能提高拉深成形的极限速度，从而提高加工成形效率。

The effect of different drawing speeds on deep drawing limit factor of dual-phase steel B340/590DP sheet was studied by numerical simulation and drawing experiment.Numerical simulation shows that the thickness reduction rate of 0.8 mm sheet metal increases from 11.473% to 16.638% when the stamping speed increases from 10 mm·s-1 to 60 mm·s-1. Drawing experiment results with the same set show that crack happens easily when stamping speed is greater than 60 mm·s-1, forming limit parameters of the finite element model and the actual drawing experiments data have a good consistency. Under the drawing mode which the slider motion velocity trajectory is controlled, raising stamping speed when drawing depth is larger than 10 mm can reduce the cracking, wrinkling and other defects. Reasonable setting of initial and subsequent forming speeds can increase the limit speed of drawing and improve the efficiency.

基金项目：

国家自然科学基金青年基金资助项目(51402189）

邓俊彦（1968-），男，硕士，工程师

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