Transactions of Materials and Heat Treatment

Title：Numerical simulation on rolling process and analysis on rolling zone forming law for large aluminum alloy C-shaped cross-section ring

Authors： Yu Huamin Dong Fang Wu Yunxin Gong Hai Liu Lei Yang Daijun

Unit： Central South University Capital Aerospace Machinery Corporation Limited

KeyWords： 2219 aluminum alloy roller system motion control equivalent strain metal flow filling depth

ClassificationCode：TG335

year,vol(issue):pagenumber：2021,46(11):197-206

Abstract：

For the aluminum alloy C-shaped cross-section ring with an outer diameter of Ф2500 mm, the rolling process of ring was simulated numerically by finite element software Abaqus. Then, the sample of 2219 aluminum alloy material was subjected to a hot compression experiment, and the true stress-true strain curve of the material at different strain rates (0.01~10 s-1) and temperatures (350~500 ℃) were obtained, which was used as material properties in the simulation experiment. Furthermore, the roller system motion control strategy was established by mathematical modeling, and the feeding speed of core roller was calculated in the condition that the outer diameter of ring grew steadily. In view of the forward slip phenomenon in the actual rolling process, the real-time rotational speed of tapered roller was modified, and the secondary development of subroutine was conducted by language Fortran to control the movement of the roller system in the simulation process. When submitting the calculation, the subroutine was called, and thereby the finite element model of the rolling process for C-shaped cross-section ring was established. Finally, through analysis, it is concluded that the temperature field and stress field in the rolling zone of ring shows axially symmetrical distribution characteristics, the metal lateral flow speed in the middle of the axial direction is faster, and the ring is completely filled in the eighth pass.

Funds：

国家自然科学基金航天联合基金项目（U1637601）

作者简介：于华民（1995-），男，硕士研究生，E-mail：huamin_yu1008@163.com；通信作者：吴运新（1963-），男，博士，教授，博士生导师，E-mail：wuyunxin@csu.edu.cn

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