Transactions of Materials and Heat Treatment

Title：Finite element analysis of 3D variable cross-section roll forming for DP980 high strength steel based on defect control

Authors： Guan Yanzhi Li Qiang Wang Yingshuang Jia Fanghui Chen Zhengyang

Unit： Inner Mongolia University of Technology

KeyWords： high strength steel variable cross-section roll forming forming defects finite element analy

ClassificationCode：

year,vol(issue):pagenumber：2014,39(4):137-142

Abstract：

In the three dimensional variable cross-section roll forming, there exists non-controlled area because the roller group can only control one point on this curve when the conjugate space curve sweeps across space surface, which leading to“free deformation zone” at the bottom of plate in roll bending process，and then forming defects occure. Based on the three dimensional variable cross-section roll forming equipment with double rack single gear shaft structure, the defect control method was put forward, and the defect optimization simulation model was established based on ABAQUS.The whole process simulation of an automobile components forming with DP980 dual phase steel material was done so as to obtain the complex forming rules, roll forming force and springback prediction in sheet metal forming processes. The simulation results show that the effect of defect control method is obvious and the forming quality is better. Through forming experiment, the effectiveness of the defect control was further verified and the forming quality was consistent with the simulation results.

Funds：

国家科技支撑计划资助项目（2011BAG03B03）

管延智（1981-），男，博士研究生

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