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| Strip shape change and its tension compensation technology in process of speed increase and decrease of cold continuous rolling mill |
| SHEN Li-tao1, XU Peng1, ZHANG Ya-zhen1, GU Qing1,3, KONG Peng-hui1, BAI Zhen-hua1,2 |
1. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, Hebei, China;
2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China;
3. School of Electrical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China |
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Abstract Aiming at the problems of unstable rolling and poor shape quality caused by the fluctuation of rolling pressure in the speed increase and decrease stage of the tandem cold rolling process. In order to reduce the rolling force fluctuation and obtain high-quality strip shape,based on the equipment and process characteristics of cold continuous rolling mill,the influence of rolling speed fluctuation on the rolling pressure change under sufficient and insufficient emulsion flow was fully considered,and the shape evolution mechanism in the process of increasing and decreasing the speed of cold continuous rolling was analyzed. On this basis,a set of corresponding tension compensation models was developed and applied to the production of an 1 800 five-stand tandem cold rolling mill with the minimum overall rolling pressure fluctuation during the speed increase and decrease process of the tandem cold rolling mill as the objective function. In practice,good results have been achieved,and the rolling stability and the strip shape quality have been effectively improved,which has the value of further popularization and application.
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Received: 29 July 2020
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2021, Vol. 56 
