Design and Application of Optimized Shape Roll Technology for Finish Stands of 1780 Hot Strip Mill

According to the “roll shifting+roll shape+ roll bending” technology and device characteristics of Ningbo steel 1780 hot strip mill, both shape control quality and mill roll life-span were prior conditions, the shape roll patent VCSW of Lian Jiachuang professor in Yanshan University was adopted as the working rolls, The straight barrel + edge curve were adopted as the backup rolls. Roll shape parameters of every working rolls and backup rolls were specified through the optimization design calculation of the typical productions. In order to make the designed shape roll fit for all productions, and make the roll milling and management convenient, weighted handling was processed to roll shape parameters. The same roll shape parameters were used to the F1～F7 backup rolls, the other two sets of the roll shape parameters were used to the F1～F4 working rolls and F5～F7 working rolls, respectively. With shape control system designed by Yanshan University, The practice showed that the strip crown was controlled between 30um and 60um, the strip flatness was good, the percentage of hits is more than 96%.