Transactions of Materials and Heat Treatment

Title：Plastic forming law on multi-degree-of-freedom oscillating rolling for thin-walled and high-rib frame

Authors： Chai Cong Han Xinghui Zhuang Wuhao

Unit： Wuhan University of Technology

KeyWords： thin-walled and high-rib frame oscillating rolling plastic deformation metal flow multi-step flash structure

ClassificationCode：TG306

year,vol(issue):pagenumber：2023,48(2):118-125

Abstract：

In order to meet the high-performance and high-efficiency manufacturing requirements for thin-walled and high-rib frame, the oscillating die was used to form the high-rib prafile, and a method of constraining metal flow by a multi-step flash structure was proposed. Furthermore, the evolution laws of equivalent stress, equivalent strain, temperature and load during the oscillating rolling process of thin-walled and high-rib frame were revealed by finite element simulation. The results show that the equivalent stress of metal in the contact area is significantly greater than that in the non-contact area, and the equivalent stress in the high-rib and the corner area of bottom plate is relatively large. The equivalent strain shows a stepped upward trend, and the equivalent strain in the high-rib area is significantly larger than that in the bottom plate area, and gradually increases from the top to the bottom of high-rib. The temperature of thin plate billet decreases as a whole, and the temperature in the corner area between high-rib and bottom plate is significantly higher than that in the other areas.The load fluctuates periodically, and the load is relatively large when the oscillating die rolls the corner area where the long edge meets the short edge, while rolls the long edge area, the load is relatively small. The study result provides a theoretical basis for the precise control of plastic deformation process of the multi-degree-of-freedom oscillating forming for thin-walled and high-rib frame.

Funds：

国家自然科学基金资助项目（U21A20131）;国家自然科学基金资助项目（52005357）；湖北省自然科学基金资助项目（2019CFA041）;中国博士后科学基金资助项目（2020M672429）;中央高校基本科研业务费专项资金资助（2022Ⅲ008XZ）

作者简介：柴聪（1997-），男，硕士研究生，E-mail：3212413767@qq.com；通信作者：庄武豪（1989-），男，博士，特任副研究员，E-mail：zhuangwuhao@whut.edu.cn

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