锻压技术

变形应力对弯曲回弹角的影响

英文标题：Influence of deformation stress on bending springback angle

作者：赵茂俞郝梦雨郭宏宇刘远泽黄波

分类号：TG386

出版年,卷(期):页码：2019,44(3):24-28

摘要：

基于修正的Chaboche回弹预测模型，计算不同圆角半径r下V形弯曲的回弹角α，分析回弹角与相对弯曲半径r/t之间的关系；通过弯曲实验，在凸模圆角半径r=1~8 mm情况下，测量弯曲回弹角α，对比理论计算与实验测量的回弹角，验证Chaboche预测模型。在此基础上，计算DP600钢板弯曲圆角变形内外区的切向应力σθ、径向应力σr，研究σθ、σr对α的影响。进一步分析r、α与σθ、σr的关系，建立弯曲程度自变量与回弹关系的数学模型。结果表明，板材的弯曲r/t的越大，α越大。通过分析影响回弹的因素，提出了控制回弹的措施。

Based on the modified Chaboche springback prediction model, springback angles α of V-shaped bending under different radius r were calculated, and the relationship between springback angle and relative bending radius r/t was analyzed. Through bending experiments, when the punch radius r=1-8 mm, springback angle α of bending was measured, respectively, and the springback angles of theoretical calculation and experimental measurement were compared to verify the Chaboche prediction model. On this basis, the tangential stress and radial stress of the inner and outer zone of bending fillet deformation for DP600 steel plate were calculated, and the influences of the tangential stress σθ and the radial stress σr on the bending fillet deformation were studied. Furthermore, the relationships between r, α and σθ, σr were analyzed, and the mathematical model of the relationship between the independent variable of bending degree and springback was established. The results show that the larger bending r/t, the greater the bending angle. Finally, the factors affecting the springback are analyzed, and the measures controlling the springback are put forward

基金项目：

赵茂俞（1969-）,男,博士,副教授，E-mail：chhmyzhao@126.com

参考文献：

［1］万敏，李东升，乔立红，等.板料成形计算机分析技术
［M］．北京: 北京航空航天大学出版社，2008.

Wan M, Li D S, Qiao L H, et al. Computer Analysis Technology for Sheet Metal Forming
［M］. Beijing: Beihang University Press, 2008.

［2］Liew K M, Tan H, Ray T, et al. Optimal process design of sheet metal forming for minimum springback via an integrated neural network evolutionary algorithm
［J］.Structural and Multidisciplinary Optimization, 2004, 26 (3-4): 284-294.

［3］Ekici B, Tekeli E.Draw bead geometry optimization on springback of sheet forming
［A］.3rd LS-DYNA Forum 2004
［C］.Bamberg，2004.

［4］Kim N H，Choi K K，Chen J S.Die shape design of sheet metal stamping process using meshfree method: Design sensitivity analysis
［J］.International Journal for Numerical Methods in Engineering,2001,51 (12): 1385-1405.

［5］乔晓勇, 成艾国, 苏飞宇, 等. 汽车外覆盖件的回弹仿真及工程控制方法
［J］. 锻压技术, 2017, 42(3): 35-39.

Qiao X Y ,Cheng A G, Su F Y, et al. Simulation and engineering control method of spring-back for auto exterior panels
［J］. Forging & Stamping Technology, 2017, 42(3): 35-39.

［6］成虹.冲压工艺与模具设计
［M］.北京：高等教育出版社，2006.

Cheng H. Stamping Process and Die Design
［M］.Beijing: Higher Education Press, 2006.

［7］张冬娟.板料冲压成形回弹理论及有限元数值模拟研究
［D］.上海：上海交通大学，2006.

Zhang D J. Springback Theory of Sheet Metal Stamping and Finite Element Numerical Simulation Study
［D］. Shanghai: Shanghai Jiao Tong University, 2006.

［8］李富柱,翟长盼,李伟,等.汽车车身构件冲压回弹研究现状
［J］.锻压技术,2018,43(2):1-8.

Li F Z,Zhai C P, Li W, et al. Research status of stamping springback of automobile body components
［J］. Forging & Stamping Technology, 2018,43(2):1-8.

［9］段永川,张芳芳,杨柳,等.高强钢板自由弯曲回弹反馈控制研究
［J］.塑性工程学报,2018,25(6):1-6.

Duan Y C, Zhang F F, Yang L, et al. Research on feedback control of free bending springback of high strength steel plate
［J］.Journal of Plastic Engineering, 2018,25(6): 1-6.

［10］刘铭心，张东民，吴艳云,等. 基于正交试验的座椅撑板冲压成形回弹研究及优化
［J］.锻压技术，2017，42(12)：36-40.

Liu M X， Zhang D M，Wu Y Y，et al. Research and optimization of springback in stamping of seat support plate based on orthogonal experiment
［J］. Forging & Stamping Technology, 2017, 42(12):36-40.

［11］王建中，胡燕杰. 汽车冲压件回弹控制方法
［J］.汽车工艺与材料，2011,（5）：1-5.

Wang J Z, Hu Y J. Resilience control method for automotive stampings
［J］. Automotive Technology and Materials, 2011,（5）：1-5.

［12］贾俐俐，柯旭贵.冲压工艺与模具设计
［M］.北京：人民邮电出版社，2008.

Jia L L,Ke X G. Stamping Process and Mold Design
［M］. Beijing: Posts and Telecom Press, 2008.

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