Patent ID: 6401506
Filing Date: 2002-06-11
Classification: B21B

Abstract:
A method of rolling a strip with a multi-roll strip rolling mill including at least top and bottom backup rolls and top and bottom work rolls, roll chocks for supporting all of the rolls and roll positioning devices for vertically positioning the roll chocks of the top or bottom backup roll, the method comprising the steps of:prior to rolling operation, pressing the rolls to each other by the roll positioning devices; measuring thrust counterforces acting axially on all of the rolls except for the backup rolls; measuring roll forces acting vertically on backup roll chocks supporting the top and bottom backup rolls; obtaining zero position of the roll positioning devices and/or deformation characteristics of the strip rolling mill based on the measurement of the thrust counterforces and the roll forces; and determining set-up position of the roll positioning devices and/or controlling the roll positioning devices for actual rolling process based on the obtained zero position and/or deformation characteristics of the multi-roll strip rolling mill.