• CN：11-2187/TH
• ISSN：0577-6686

›› 2011, Vol. 47 ›› Issue (24): 57-62.

• 论文 •

7075铝合金板预拉伸工艺研究

1. 重庆大学机械传动国家重点实验室;中国汽车工程研究院股份有限公司;西南铝业(集团)有限责任公司
• 发布日期:2011-12-20

Numerical Simulation and Experimental Investigation of the Aluminium Alloy Quenching Process by Considering the Flow Stress Characteristic

ZHU Caichao;LUO Jiayuan;LI Dafeng;DING Huafeng; ZHONG Yu

1. State Key Laboratory of Mechanical Transmission, Chongqing University China Automotive Engineering Research Institute Co., Ltd. Southwest Aluminum (Group) Co., Ltd.
• Published:2011-12-20

Abstract: By introducing the flow stress curve, the numerical simulation of stress redistribution during the quenching process for 7075 aluminum alloy plates with different thickness is performed using a direct thermo-mechanical coupled method. Considering the practical clamping, the stretching simulation of 7075 aluminum alloy sheets with different thickness is conducted to analyze the residual stress distribution. Also, the pre-stretching process is optimized to determine the stretch rate and the amount of cutting. Through the analysis, the influences of thickness variation on quenching-induced residual stresses, stretching residual stresses and the amount of cutting are investigated. A practical experiment was conducted to demonstrate the quenching-induced residual stresses distribution using a blind hole measuring method. The result which compares well with the simulation shows that the quenching-induced residual stress, stretch rate and the amount of cutting are increased as the aluminium alloy plate becomes thicker. The length of transition zone is about 60%～70 % of the thickness.