Transactions of Materials and Heat Treatment

Title：Process parameters optimization on rear cross beam of car roof panel based on Autoform-Sigma

Authors： Li Ying Jiao Hongyu Niu Shuguang

Unit： Changshu Institute of Technology

KeyWords： panel roof rear cross beam stamping fracture wrinkle technological parameter optimization Autoform-Sigma

ClassificationCode：TG385.2

year,vol(issue):pagenumber：2015,40(9):16-20

Abstract：

For the rear cross beam of car roof panel, the numerical simulation of its forming process was conducted by Autoform. Based on the results of the initial stimulation, blankholder force and drawbead coefficients nearby defects like fracture and wrinkle were chosen as the design variable, and then process parameters were optimized by Autoform-Sigma. When the optimization was convergent, the optimal result was obtained after 123 iterations and the optimal stamping process parameters were confirmed. The optimal result shows that defects like fracture and wrinkle do not appear in original fracture areas, and the areas of inadequate deformation decreases, as well as principal strain and thinning ratio declines drastically. Based on the above optimal process parameters, stamping tests were carried out, and productions were obtained without defects of wrinkle and crack, which are consistent with the numerical results, and the correctness of stamping process parameters optimization was verified sufficiently.

Funds：

国家自然科学基金资助项目（61404012）；江苏省科技计划项目（BE2011096）

李英（1979-），女，硕士，讲师;通讯作者：焦洪宇（1981-），男，博士，讲师

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