Transactions of Materials and Heat Treatment

Title：Research on design method of three-dimensional stretch bending die for doorframe of a car

Authors： Wang Qiang Huang Shijun Xu Shaodong Hu Lingfeng Fan Xiaojian

Unit： Fanghua-SECM Machinery Co. Ltd. Yanshan University Beijing Tianhai Industry Co. Ltd.

KeyWords： three-dimensional stretch bending die springback stress-strain curve doorframe of car

ClassificationCode：TG302；TG306

year,vol(issue):pagenumber：2014,39(5):51-55

Abstract：

In order to reduce the three-dimensional stretch bending springback of doorframe of a car, uniaxial tensile test method was used to obtain the basic performance parameters such as elastic modulus, ultimate strength, yield strength, strain hardening modulus, etc. and true stress-strain curve equation for the SPCC material. The relationship between curvature radii of inner before and after springback and springback radius expression for stretch bending workpiece were given based on bending springback calculation of sheet metal. On the basis of analysis, a workpiece discrete method was proposed to calculate the shape line before springback, and the method was used to determine the shape line of bending die and further draw its shape. According to the results of theoretical analysis, the three-dimensional bending die of doorframe was designed, and the qualified workpieces were obtained by bending test. The results show that the method is suitable for the design of stretch bending die.

Funds：

秦皇岛市科技支撑计划（201101A139）

王强（1980-），男，硕士研究生，工程师黄世军（1980-），男，博士，讲师

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