Transactions of Materials and Heat Treatment

Title：Division and optimization design on friction sensitive region for automobile front plate die surface

Authors： Fu Yonghong Hu Guangyao Fu Hao

Unit： School of Mechanical Engineering Jiangsu University Zhenjiang 212013 China

KeyWords： stamping die friction characteristics automobile front plate partition region thickness thinning

ClassificationCode：TG316

year,vol(issue):pagenumber：2019,44(5):121-125

Abstract：

Cracking is one of the main defects of stamping parts. In order to improve the forming quality of sheet metal, the friction coefficient of die surface was optimized. For the automobile front plate, the characteristic of die structure was analyzed, the die surface was divided into several parts, and the stamping process of automobile front plate was simulated by ABAQUS software. Taking the thickness in the A and B positions of sheet metal as the optimization objective, the influences of friction characteristics of different regions of die surface on sheet metal forming were analyzed by single factor method, and the friction sensitive region of die surface was determined. Then, through the uniform design method, the optimal combination of friction coefficient of die surface is determined as μ1=0.02,μ2=0.03, μ4=0.04, μ5=0.06，μa=0.18, μd=0.21, the friction coefficients of other die surfaces are 0.12, and the minimum reduction rates in the A and B positions of sheet metal are the smallest. Reducing the friction in the regions 1, 2, 4, 5 and increasing the friction in the regions a, d can reduce the thickness reduction and the probability of forming parts to crack.

Funds：

江苏省重点研发计划项目（BE2016144）

作者简介：符永宏（1965-），男，博士，教授 Email：〖WTBZ〗brillo@foxmail.com

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