High-efficiency calculation method for roll stack elastic deformation of four-high mill
WANG Dong-cheng1,2,WU Yan-lin1,LIU Hong-min1,2
(1. National Engineering Research Center for Equipment and Technology of Cold Rolling Strip, Yanshan University,Qinhuangdao 066004, Hebei, China 2. State Key Laboratory of Metastable Materials Science and Technology,Yanshan University, Qinhuangdao 066004, Hebei, China)
Abstract:The calculation speed of the general influence function method is slow. To solve the problem, a new high-efficiency calculation method of roll stack elastic deformation for four-high mill was proposed based on the analysis of the main factors affecting the calculation precision and speed of general influence function method. In this method,the transverse distribution of the pressure between rolls and rolling pressure were described by high-order polynomial,reducing the calculated amount of roll deflection. Compared with the general influence function method,the order of linear equations to solve the pressure between rolls was significantly reduced,thus greatly saving the computing time. With this method,the single computing time of roll stack elastic deformation for four-high mill was less than 1 ms. Meanwhile,the computing accuracy matched well with that obtained by general influence function when dividing into 100 elements. It provided the ideal necessary condition for the on-line setting of flatness,and it could be applied to other mill types.
王东城,吴燕林,刘宏民,. 四辊轧机辊系弹性变形高效计算方法[J]. 钢铁, 2015, 50(11): 69-74.
WANG Dong-cheng,,WU Yan-lin,LIU Hong-min,. High-efficiency calculation method for roll stack elastic deformation of four-high mill. Iron and Steel, 2015, 50(11): 69-74.
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