Abstract:The capacity and quality of sheet and strip is a momentous mark of the industrial development level, especially the copper strip. SUNDWIG 20-high mill is the key equipment for cold rolling of copper sheet and strip. The bending deformation of its outermost A and D support axle group is one of the most important means to affect the flatness. The change of the saddle displacement can bend the core shaft of the support axles, the deformation will be reflected on the support roller and transferred to the intermediate rolls and the work roll in turn, and ultimately affect the plate thickness and flatness. The traditional calculation method of support axle group deformation such as hypothetical broken line method and statically indeterminate beam method which considers the support axle and support roller as a whole, but the influence of the deformation between them on the support axle group deformation deformation is ignored. The bending deformation of each section of the support roller based on the finite element method was simulated and fitted to obtain the bending deformation of the whole support axle group,and then evaluated the influence of the deformation on the plate flatness with the flatness prediction model based on the elastic deformation model of roll system and the metal plastic deformation model. The results show that the thickness and flatness distribution doesn′t change locally but in the total width direction after applying different displacement combinations to four saddles in the upper roll system. Four saddles have different adjustment effects on shape and thickness. With the same displacement applied, the influence of the middle saddle on the flatness and thickness is greater than that of the side saddle. In addition,even if symmetrical saddle shift are applied in the saddle of the upper roll system,the influence on the thickness and flatness is asymmetric.
孙建亮, 晏铭泽, 李明远, 郝同同. 二十辊轧机支撑辊组变形及板形调控分析[J]. 钢铁, 2021, 56(12): 85-95.
SUN Jian-liang, YAN Ming-ze, LI Ming-yuan, HAO Tong-tong. Analysis on flatness about support axle group deformation in 20-high mill[J]. Iron and Steel, 2021, 56(12): 85-95.
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