Transactions of Materials and Heat Treatment

Title：Research on stretch bending of hollow aluminum alloy profile

Authors： Liu Xuezhi Zhang Shilei Li Shitao Liu Chunguo Zhang Xueguang

Unit： CSR Qingdao SIFANG Co. Ltd. Jilin University

KeyWords： aluminum alloy profile stretch bending forming defect numerical simulation

ClassificationCode：TG302

year,vol(issue):pagenumber：2015,40(5):69-73

Abstract：

The advantages of stretch bending are excellent forming accuracy, low springback and high production efficiency. Numerical simulation and forming experiment on the end bending beam of rail train were carried out. The trajectory of jaw was obtained by mathematical analysis, and the typical forming defects were defined in stretch bending process of aluminum alloy profile. The stress distribution, springback, cross-section distortion and spatial twist of formed parts were compared and analyzed for different materials and processing parameters by numerical simulation. Numerical simulation results show that ENAW-6005-T4 material can avoid fracture in stretch bending. The loading couple of 0.5% pre-stretch and 1.5% post-stretch can minimize the springback. The filling pressure of 1.5 MPa can restrain the concave of side wall effectively. The spatial twist can be decreased by improving the frictional condition. Experimental validation was conducted with the optimized processing parameters, and measured results show a consistency with numerical analysis.

Funds：

国家自然科学基金资助项目（51275203）

刘学之（1962-），男，硕士，高级工程师

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