Improving the Methodology for Calculating the Finishing Group Power of a Continuous Wide-Strip Hot Rolling Mill

To determine the power of a process of hot rolling of strips in the mill’ finishing group, the methodology for calculating specific work in the elastic areas of deformation zone is supplemented by accounting the influence of speed on the contact friction coefficient of a strip and work rolls. For the first time, a reliable regression equation has been obtained to determine the rolling friction arm coefficient in the contact of support and working rolls of the hot rolling mill 2000 finishing group of Severstal PJSC, which makes it possible to determine the power consumption spent on overcoming the rolling friction itself and rotating the idle support rolls. Maximum error in calculating power using the augmented method, taking into account the specified technology factors, was 11.9%, the average was 5.5%.