JPS6444201A - Method for rolling h-shape steel - Google Patents

Abstract

PURPOSE:To uniformize the thickness distribution in the longitudinal direction after finishing rolling by setting each roll gap between a horizontal roll and vertical roll in the final pass of a rough universal rolling more than the same as the pass immediately before the final pass. CONSTITUTION:At the time of the reverse rolling of an H shape steel by a rough universal rolling mill, the respective gap between the horizontal roll and vertical roll of the final pass in the reverse rolling is set more than the same as the respective gap of the horizontal and vertical rolls of the pass immediately before the final pass to roll the H-shape steel. In succession the H-shape steel after the reverse rolling is subjected to finishing rolling by a finishing universal rolling mill in the same direction as that of the final pass in the reverse rolling. Consequently, the material to be rolled bitten into the finishing universal rolling mill becomes thicker as the end part of the finishing universal rolling mill side and thinner as the end part of the counter side thereof and it is subjected to finishing rolling and the thickness distribution in the longitudinal direction is uniformized.