Transactions of Materials and Heat Treatment

Title：Quality control of front beam for rear floor part used in car

Authors： Ke Guiyan Lu Ping Jiang Kaiyong Xin Xiumin Chen Qingyan

Unit： Huaqiao University Xiamen Yulong Machinery Co. Ltd.

KeyWords： shape of sheet metal stamping drawbeads Dynaform

ClassificationCode：TG386

year,vol(issue):pagenumber：2016,41(8):39-42

Abstract：

In sheet metal stamping forming process, an appropriate shape of blank and reasonably setting of drawbeads reasonably can improve metal flowing properties and reduce wrinkling and cracking, thus avoid forming defects. For a front beam of rear floor part in the car, its forming process was analyzed by the commercial software Dynaform. The punch surface was unfolded and the contour line was offset by utilizing the BSE (Billet Size Estimation) module of Dynaform. A forming process of the contour line-offset blank was simulated. On the basis of forming limit diagram and edge movement of the sheet metal, the upper left and right corners of the blank were cut off to avoid cracking defects, and the optimized blank was obtained. The obtained simulation results show that flow of the metal at the upper corners is significantly improved and the drawing resistance is reduced. Moreover, in order to solve the wrinkling problem, drawbeads are set in the middle of contact surface between die and blank holder. The experiment results show drawbeads impair the metal flow in the middle zone of the blank and improve drawing resistance. Therefore, its forming quality is improved.

Funds：

国家自然科学基金资助项目（51305144）；福建省自然科学基金资助项目（2015J01203）；福建省科技计划重点项目（2008H0085）；华侨大学研究生科研创新能力培育计划资助项目

柯桂颜（1992-），男，硕士研究生路平（1980-），女，博士，副教授

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