Transactions of Materials and Heat Treatment

Title：Finite element simulation and optimization on forming process of automobile front lower sway arm for aluminum alloy

Authors： Yin Jian Li Cheng Jin Kang Yin Jiajian Sun Fenli

Unit： Beijing Research Institute of Mechanical & Electrical Technology Ltd. China Machinery Industry Technology Research Institute of Precision Forming

KeyWords： aluminum alloy automobile front lower sway arm bending folding defect mold optimization

ClassificationCode：TG316

year,vol(issue):pagenumber：2021,46(11):74-82

Abstract：

For the metal confluence defect at the rib of forgings found in the production process of automobile front lower arm for 6082 aluminum alloy, a finite element model was established based on the forging process scheme and mold in the actual production, and the forging process was simulated numerically in the condition of the initial temperature of 500 ℃, the friction coefficient of 0.4, the mold temperature of 280 ℃ and the heat exchange coefficient of 2 N·（mm·s·℃）-1. Then, the distributions of temperature field, pressure field and thickness sizes of part in the bending and final forging processes were analyzed. Especially the metal flow law at the metal confluence defect was studied, and it was determined that it was a folding defect. Furthermore, the improvement measures for optimizing the transition fillet of mold were proposed, and the fillet radii of ribs and webs were increased from the original 3 mm to 8 mm. Finally, the feasibility of the mold optimization measures was verified by experiments.

Funds：

作者简介：殷剑（1997-），男，硕士研究生，E-mail：a18726451924@163.com；通信作者：金康（1978-），男，硕士，高级工程师，E-mail：jinkang@cmipf.com

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