Design and application of work roll profile on UCM-mill
ZHANG Jian-lei1, CHEN Wei2, LU Jia-dong1, YUE Chong-xiang1
1. Institute of Research of Iron and Steel, Jiangsu Shagang, Jiangsu Shagang Group Co., Ltd., Zhangjiagang 215600, Jiangsu, China; 2. Zhangjiagang Yangzi River Cold Rolled Sheet Co., Ltd., Jiangsu Shagang Group Co., Ltd., Zhangjiagang 215600, Jiangsu, China
Abstract：When UCM mill uses conventional chamfering work roll to produce silicon steel,the strip steel has the problem of edge tension and belt breaking,which affects the production efficiency. To solve this problem,the roll profile EDC anti breaking belt is designed independently. It reduces the change rate of edge chamfer through reverse arc design and homogenizes the strip steel edge stress. It can improve the production stability on the premise of ensuring that the mill edge drop control level is not reduced. The EDC roll profile curve is symmetrically distributed on both sides,including the middle flat roll zone,anti break belt control zone and deviation control zone. Because UCM mill does not have the function of work roll shifting,this paper divides multiple width sections according to the distribution law of product width. It designs multiple sets of roll profiles to adapt to the rolling of different width sections. The three-dimensional elastic-plastic finite element model of strip rolling is established by numerical simulation technology,and the strip edge stress and edge drop control effect of EDC roll profile and conventional chamfering work roll are compared. The simulation data show that strip edge stress of EDC work roll profile is reduced. Under the same roll bending force,the improvement effect of EDC roll profile on edge drop is more obvious. Under the condition of zero bending force,the edge drop of conventional chamfering work roll is 15 μm. The edge drop of EDC roll profile is 8 μm. The effect of edge drop control is better than conventional chamfering work roll. The roll profile parameters are written into Python software to realize the efficient and automatic solution of curve parameters. It can adjust the roll profile parameters according to the on-site roll use and product edge drop requirements,and has a certain flexibility. The EDC roll profile curve is applied to the commissioning of a 1 420 UCM coupled mill. The on-site shape is normal and the production is stable. The proportion of width thickness difference ≤7 μm is increased from 32% to 56%,with an increase of 75%. The effect is significantly improved. The belt breaking rate of the mill is controlled from 0.1% to less than 0.02%.
张建雷, 陈卫, 陆佳栋, 岳重祥. UCM轧机工作辊辊形设计及应用[J]. 钢铁, 2022, 57(8): 123-131.
ZHANG Jian-lei, CHEN Wei, LU Jia-dong, YUE Chong-xiang. Design and application of work roll profile on UCM-mill[J]. Iron and Steel, 2022, 57(8): 123-131.
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2022, Vol. 57 
