Abstract：It is of great significance to expand flatness control ability of cold rolling mill in the context of continuous enrichment for current cold rolling products variety structure. In view of the problems on insufficient ability to provide positive crown of extended rolling mill and high frequency use of convex work roll in a steel plant, the idea of transferring work roll crown to backup roll, providing part of the crown by backup roll, and using flat roll as far as possible for work roll was put forward, and three types of backup roll profiles, CVC, VCL, VCL+, were designed. The integrated model of roll system was established, and the simulation comparison of control ability was made between new roll type and original roll type. The results show that VCL140+ backup roll with flat work roll can replace original flat backup roll with convex work roll, and can significantly improve the uniformity of contact pressure between rolls. After the application of new roll type on the machine, the occurrence rate of edge wave plate shape for ultra-high strength steel is reduced from 33% to 4%, and the utilization rate of convex work roll is reduced from 95% to 5%. Over-limit problem of roll bending and shifting of the unit has been completely solved. The monthly steel throughput of backup roll has increased from 120 000 t to 150 000 t on average, and the production efficiency has been significantly improved.
李硕, 于洋, 宋浩源, 马家骥, 马宁, 陈彦旭. 基于凸度转移理念的冷轧支撑辊辊型设计[J]. 中国冶金, 2023, 33(9): 112-117.
LI Shuo, YU Yang, SONG Haoyuan, MA Jiaji, MA Ning, CHEN Yanxu. Roll contour design of cold rolling backup roll based on crown transfer concept[J]. China Metallurgy, 2023, 33(9): 112-117.
2023, Vol. 33 
