Transactions of Materials and Heat Treatment

Title：Study on drawing fracture in round corner of side-frame auto panel and influence factors

Authors： DIAO Ke-shan1 CHEN Xin-ping1 JIANG Hao-min1 CHEN Qing-xin1 SHI Lin2 (1.Institute Baoshan Iron Steel Co. Ltd. Shanghai 201900 China 2.Dongfeng Nissan Passenger Vehicle Company Guangzhou 510800 China)

Unit：

KeyWords： side-frame auto panel deep drawing fracture drawbead

ClassificationCode：TG386.32

year,vol(issue):pagenumber：2008,33(2):23-26

Abstract：

Because the side-frame auto panel has many complex model surfaces,the wrinkle and fracture defects are often produced in deep drawing process.Considering the occasional fracture of an auto panel,the circle grid analysis was firstly conducted to determine the metal flow and the forming characteristics and the reason of necking and fracture was got.Then the FE model with the similar forming feature of the round part of the auto panel was established.The analysis on the influence of blank shape,draw bead restrain force on the formability was performed and the effect of two die repairing schemes was also achieved.At last,the validity of the analysis and effectiveness of the die repairing schemes were verified by the field production.

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Reference：

[1]蒋浩民,陈新平,李川海,等.大型车车身覆盖件冲压成形特征分析及选材研究[J].金属成形工艺,2003,21(3):50-51.
[2]王义林,郑金桥,李志刚.汽车覆盖件冲压工艺方案优化设计评价模型研究[J].机械科学与技术,2006,25(2):181-183.
[3]Keck P,Wilhelm M,Lange K.Application of the finite ele-ment method to the simulation of sheet forming processes:comparison of calculations and experiments[J].InternationalJournal for Numerical Methods in Engineering,1990,30(8):1415-1430.
[4]Rebelo N,Nagtegaal J C,Hibbitt H D.Finite element anal-ysis of sheet forming processes[J].International Journal forNumerical Methods in Engineering,1990,30(8):1739-1758.
[5]沈启?.金属板料成形的数值模拟技术及其在汽车覆盖件成形工艺设计中的应用研究[D].上海:上海交通大学,1999.
[6]陈新平,汪承璞.一种预测左半部成形极限图的简单方法[J].金属成形工艺,2000,18(4):4-6.
[7]陈新平,蒋浩民.汽车钢板胀形区成形极限图的预测与验证[J].金属成形工艺,2003,21(6):86-88.
[8]王凤琴,赵军,官英平.毛坯外形对盒形件拉深成形的影响[J].中国机械工程,2003,14(7):619-622.
[9]徐国艳,施法中.板料冲压成形毛料计算方法研究进展[J].锻压技术,2001,26(4):14-16.
[10]雷正保,付爱军,黄充,等.拉延筋模拟方法对覆盖件CAE结果影响的工业试验[J].汽车工程,2004,26(1):73-77.
[11]黄桂美,詹艳然.等效拉延筋模型及其在板料成形数值模拟中的应用[J].现代制造工程,2005,(10):57-58.

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