Plane surface form control method and plane surface form control control equipment

摘要

PROBLEM TO BE SOLVED: To effectively and precisely control a plane shape and to also execute the feed-back control on a plate during rolling. SOLUTION: This is a plane shape controlling method on a thick plate rolling to rectangularly make a plate edge rear end by using edging rolls 14a, 14b, the plate width after rolling is measured with a plate width detector 15, the width deformed amount of the plate edge rear end is calculated with a width deforming amount arithmetic part 16 from the measured value, and the calculated width deformed amount and a set width deforming amount of every pass- schedule which is obtained with a pre-calculation and stored in an arithmetic part 17 are compared and calculated with the arithmetic part 17. Based on this comparison calculated result, the rolling reduction of the edging rolls 14a, 14b on the next pass schedule is controlled, the plate shape is controlled effectively and precisely, and the feed-back control onto the plate during rolling is realized also.