Optimal Size Control in Plate Rolling

Abstract

This report describes plate thickness control and plate width control whose accuracy directly influences product yield. Concerning thickness control, it is necessary to increase the accuracy of gagemeter model for absolute mode AGC (Automatic Gage Control). Therefore, the authors developed a new roll bending model for operation. This model was obtained by correcting the solution of simply supported beam with the quadratic function of plate width by considering work roll balance force. Concerning width control, the authors developed a new method for calculating the thickness after broadside rolling, which was based upon the slab volume calculated in actual slab weight without scale losses in the reheating furnace.
These techniques greatly improved the accuracy of plate thickness and width. Consequently, ordered product yield can constantly be maintained at a high level of 94.5% (C. C. slab).