Transactions of Materials and Heat Treatment

Title：Theory and simulation study on hydraulic bulging process of mini-car rear axle

Authors： Zhang Yuning Li Jian Li Bin Yuan Jie

Unit： Guangxi University of Science and Technology

KeyWords： rear axle hydraulic bulging numerical simulation load path annealing

ClassificationCode：TG386;TG394

year,vol(issue):pagenumber：2014,39(9):143-149

Abstract：

Theoretical research and simulation analysis were combined together to study the failure modes, and thickness distribution of the wall and load paths during the hydraulic bulging process of rear axle in order to predict the forming situation and regular patterns of rear axle tube under various load paths, which reduces the developmental and experimental cost for the bulging process. The bulging process of aluminum alloy tube was simulated using ABAQUS finite element software. Simulated results were verified by the experimental results. Based on the above results, the bulging process of mini-car rear axle was numerically simulated and the reasonable load paths were obtained through analysis and summary. The results show that reasonable load paths in pre-forming and final bulging stage are constant pressure 47 MPa and multi-linear loading path 4, respectively. The rear axle after the final bulging stage is treated with annealing to reduce the residue stress from pre-forming so that a better bulging result is obtained.

Funds：

广西重点实验室建设项目（13-051-38）

张豫宁（1989-），男，硕士研究生

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