Transactions of Materials and Heat Treatment

Title：Simulation test and optimization of punching for flange nut in automobile

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ClassificationCode：TH162+11

year,vol(issue):pagenumber：2020,45(4):114-119

Abstract：

In view of the serious wear for lower punch during the punching process of hexagon flange nut in the actual production of enterprise, the punching process of flange nut was simulated with the finite element software DEFORM-3D, and the optimization of die parameters was focused on. The Arcard wear model and the SCM435 steel constitutive model were established. Based on the dynamic simulation results, the wear mechanism of lower punch in the punching process was analyzed intuitively. Combined with the simulation results, taking the wear amount of lower punch as the optimization goal and selecting some key factors as the simulation test factor, the orthogonal test of multiple levels was established. According to the simulation results, the key of each experimental factor was analyzed. By range and variance analysis, the optimal process parameters and the optimal structure of lower punch were obtained during the punching process of hexagon flagenuts, and according to the minimum wear amount, the service life of lower punch was forecasted. Finally, according to the mold trial production and die test production, the quality of hexagonal flange nut is good, the wear speed of lower punch is reduced significantly, and the cost of the enterprise is reduced effectirely.

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银俊鹰（1974-），女，硕士，高级讲师 E-mail：3046388565@qq.com 通讯作者：赵勇桃（1974-），女，博士，副教授 E-mail：yinjunying2@163.com

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