Analysis and selection of crown control ranges for CVC work rolls in CSP hot rolling

In order to give full play to the crown control ability of CVC work rolls and improve the profile quality of strips,in-situ tracing and testing the shifting position of CVC work rolls in a CSP production line were conducted.The result indicated different shifting characteristics of CVC work rolls for different stands,which reflected their inappropriate crown control ability.Based on the research on different profile control characteristics for different stands,the influence of the wear contour of work rolls on the crown control ability,the different control effects of CVC work rolls in different stands,and the high reduction during CSP hot rolling,a principle was proposed that the crown control ability of CVC work rolls should decrease from F1 stand to F7 stand during CSP hot rolling,and three different shifting strategies,normal distribution,parabola distribution and to-and-fro shifting,for CVC work rolls were presented.