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| Optimal control of work roll shifting in tandem cold rolling mill based on multi-objective optimization |
| SONG Jun1,2, REN Ting-zhi1, WEI Zhen3, LIU Bao-quan2, WANG Kui-yue2, SONG Bao-yu2 |
1. Education Ministry Engineering Research Center of Rolling Equipment and Complete Technology, Yanshan University, Qinhuangdao 066004, Hebei, China;
2. Ansteel Beijing Research Institute Co., Ltd., Beijing 102211, China;
3. The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China |
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Abstract In order to solve the problem that on-line shifting of work roll and shape of work roll cone section often cause strip breaking when continuous two coils are flying gauge change and the mill is in high speed continuous production. Based on the multi-objective optimization theory, the multi-objective function of the work roll shifting was constructed and the optimal roll shifting interval under different roll shapes was calculated, the edge drop control effect of tandem cold mill was improved. At the same time, according to the dynamic compensation control of work roll shifting speed, the optimal control value of roll shifting speed under different rolling force conditions was determined to reduce the influence of roll wear and axial force, ensure the stability of the high-speed rolling process, reduce the times of strip breaking in the process of work roll shifting, and improve the mill operating rate and product quality.
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Received: 20 January 2021
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2021, Vol. 56 
