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| Oil film thickness model of roll surface and its influencing factors during double cold rolling |
| QIAN Cheng1,2, ZHANG Jia-sheng2, BAI Zhen-hua2,3, CUI Ya-ya4, HUA Chang-chun1, CHEN Shu-zong1 |
1. School of Electrical Engineering, Yanshan University, Qinhuangdao 066004, Hebei, China;
2. National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, Hebei, China;
3. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, Hebei, China;
4. College of Mechanical and Equipment Engineering, Hebei University of Engineering, Handan 056038, Hebei, China |
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Abstract In order to solve the problem that the oil film thickness of roll surface cannot be measured online,based on the description of the formation and evolution mechanism of the oil film thickness on the surface of the roll during the double cold rolling process,the oil film thickness model of the roll surface was established using the principle of fluid dynamics. The effects of five factors,such as rolling speed,roll roughness,maximum contact stress between rolls,emulsion initial dynamic viscosity and emulsion pressure viscosity coefficient on the roll surface oil film thickness were quantitatively analyzed. The model was applied to the unit of 1 220 double cold rolling mill. The error between the calculated roll surface oil film thickness and the measured oil film thickness on the surface of the roll by the weighing method is less than 10%,and the calculation accuracy of the model meets the field requirements.
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Received: 23 September 2019
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2020, Vol. 55 
