Transactions of Materials and Heat Treatment

Title：Die design method for sheet metal stamping workpiece with compensating springback

Authors： LI Wen-ping1 Bian Wen-de2 NIE Shao-min1 GUO Bao-feng1 JIN Miao1(1.College of Mechanical Engineering Yanshan University Qinhuangdao 066004 China 2.Dongfang Electrical Machinery Co. Ltd. Deyang 618000 China)

Unit：

KeyWords： springback compensation die design sheet metal stamping numerical simulation

ClassificationCode：TG385

year,vol(issue):pagenumber：2007,32(5):86-91

Abstract：

Part shape error due to springback is one of most important manufacturing defect in sheet metal stamping process.This problem can be corrected by using appropriate designs of the die shape.A new method for designing sheet forming dies was introduced.It was based on iteratively comparing a target part shape with the finite element simulated part shape following forming and springback.The displacement at each node was used to adjust the trial die design until the target part shape was achieved.The proposed method was demonstrated for one case of forming a simple three dimensional part with an aluminum alloy sheet.The result of the numerical investigation indicates that the designed dies are found to produce the target part shape with very small error only through twice adjusting process.The corresponding experiment was carried out.The results show that the designed tools obtained by repeated displace compensating method can produce the desired part shapes with small error.

Funds：

国家自然科学基金资助项目(50305031);; 华中科技大学塑性成形模拟及模具技术国家重点实验室开放基金资助项目(04-04);; 河北省教育厅科研项目(05-04);; 燕山大学博士基金资助项目(06-9)

Reference：

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