Force Feed Forward Automatic Gage Control of a Hot Rolling Mill

Abstract

The concept of applying feed forward control to solve the question of thickness control for hot rolled coils has been succesfully implemented at the Hot Strip Mill of SIDERAR S.A.I.C. through the F.F.F. A.G.C. By keeping constant the roll gap at the first stand of the Finishing mill, hardness variations of material determine roll force modifications which are used to calculate gap and speed adjustments of the next stands prior to the arrival of the disturbance, turning therefore unnecesary high cost modifications of the mill drives.