Transactions of Materials and Heat Treatment

Title：Simulation analysis and experiment verification on chain-die forming for longitudinal beams of battery pack

Authors： Chen Wenyue1 Zou Tianxia1 Li Dayong1 Peng Yinghong1 Xiao Hua2 3 Shi Lei2 3 Zhu Ming4 Wang Quanwei4

Unit： 1.State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University 2. Research Institute Baoshan Iron & Steel Co. Ltd. 3. State Key Laboratory of Development and Application Technology of Automotive Steels (BaoSteel) 4. Shandong Xinheyuan Technology Co. Ltd.

KeyWords： longitudinal beam of battery pack ultra-high strength steel chain-die forming dimensional accuracy variable height

ClassificationCode：TG335

year,vol(issue):pagenumber：2024,49(4):48-53

Abstract：

A chain-die forming scheme for the longitudinal beam of battery pack made of QP1180 ultra-high strength steel was proposed to solve the forming problem of ultra-high strength steel beam parts with step structure characteristics. In order to form this kind of longitudinal beam for battery pack with typical variable height characteristics, a new structure of chain-die forming die was proposed, considering the unique motion mode of chain-die forming and avoiding the defects of collision between die and sheet during the forming process of part. Then, through numerical simulation method, the stress distribution condition of part and the working load of frame in the chain-die forming process were analyzed to determine the feasibility of the process scheme. The optimization iteration of die was carried out to determine the compensation parameters of the final die based on the simulation results to control the angular deviation of the simulation results within ±1°. Finally, experiments and specimen preparation for chain-die forming were carried out, and the dimensional deviation of the trial parts was within ±1 mm.

Funds：

国家自然科学基金资助项目（U1860110）

作者简介：陈文跃（1998-），男，硕士研究生 E-mail：Samuel1165694560@sjtu.edu.cn 通信作者：李大永（1973-），男，博士，教授 E-mail：dyli@sjtu.edu.cn

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