Transactions of Materials and Heat Treatment

Title：Numerical simulation and springback compensation on stamping process for fender inner plate

Authors： Tang Yan1 Jiang Song2

Unit： 1. Institute of Rail Transit Nanjing Vocational Institute of Transport Technology 2. Sichuan Chengfei Integration Technology Co. Ltd.

KeyWords： material utilization rate plastic strain surface defect springback amount clamp scheme strategy of springback compensation conformity

ClassificationCode：TG376.9

year,vol(issue):pagenumber：2021,46(12):105-111

Abstract：

The finite element model of stamping process for fender inner plate was established, and the drawing process of part was simulated. Then, the splicing way of part and the form of draw-addendum were determined by considering the material utilization rate, plastic strain, surface defects and springback amount comprehensively. In order to enhance the adaptability of the forming on working conditions such as material performance fluctuations, friction condition changes, die clearance changes caused by frictional heat generation in the mass production, the formability margin of part by fluctuating the blank holder force of -10%-30% was designed, and the influence of the blank holder force fluctuation in drawing on the springback was analyzed. Furthermore, the benchmark, strategy and area of springback compensation were determined by comparing the simulation results of free springback and clamping springback of parts, and there was a certain difference of the springback results between numerical simulation and debugged part. Finally, the blank holder force, friction factor, yield strength, tensile strength and thickness anisotropy index were designed as main variables according to the production situation of part, and the reasons for the differences from the fluctuation of free springback and clamping springback of parts were analyzed.

Funds：

唐妍（1983-），女，硕士，讲师 E-mail：tangyan4job@foxmail.com

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