锻压技术

WELDOX960高强度钢板折弯回弹角预测分析与试验验证

英文标题：Test verification and predictive analysis on springback angle for

作者：陈刚李治国陈伟

分类号：TG386

出版年,卷(期):页码：2019,44(4):73-77

摘要：

在工程机械、船舶等制造行业中，高强度钢板折弯成形的回弹控制策略直接影响板料成形精度，为更好地研究材料厚度、下模开口、上模圆角半径、折弯角度等参数对高强度钢板折弯回弹角的影响规律，以WELDOX960高强度钢板为研究对象，采用有限元分析和试验相结合进行研究。结果表明：折弯回弹角随下模开口、上模圆角半径、折弯角度的增加，呈线性增加趋势；随着材料厚度的增加，折弯回弹角大致呈直线减小的趋势，当厚度大于7 mm时，减少的趋势变缓。最后，综合考虑各影响因素，得出了WELDOX960高强度钢板的回弹角预测方程，并通过试验对比加以修正，回弹角与工程实际一致。

In construction machinery, ships and other manufacturing industries, the springback control strategy of high strength steel plate bending directly affects the precision of sheet metal forming. In order to study the influences of material thickness, lower die opening, upper die fillet radius and bending angle on the bending springback angle of high strength steel plate, for WELDOX960 high strength steel plate, the finite element analysis and experiment study were conducted. The results show that the bending springback angle increases linearly with the increasing of the lower die opening, the upper die fillet radius and the bending angle, and the bending springback angle decreases linearly with the increasing of the material thickness, furthermore the decreasing trend becomes slower when the thickness is greater than 7 mm. Finally, the prediction equation of springback angle for WELDOX960 high strength steel plate is obtained by considering all the effecting factors comprehensively, it is corrected by comparing the test results, and the springback angle is consistent with the engineering practice.

基金项目：

湖南省教育厅科学研究项目（XJK18BZY035）

陈刚（1974－），男，硕士，教授，高级工程师 E-mail：hncg665@sina.com

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