METHOD FOR ROLLING DIFFERENT CIRCUMFERENTIAL SPEED MATERIALS

摘要

PURPOSE: A method for rolling materials with a different roll-speed is provided to prevent damages to a rolling roll by differently setting a circumferential speed depending on the existence of loads. CONSTITUTION: A method for rolling materials with a different roll-speed is as follows. A curvature of an edge part discharged from a rolling roll at a target curvature is measured(S14). A different roll-speed in an on-road condition is calculated by calculating the curvature if the measured curvature and the target curvature are out of a permissible range(S24). After calculating the different roll-speed in the on-road condition, and an idle load is calculated. If the idle load is below a target value, the calculated different roll-speed in the on-road condition is set. If the idle load is more than the target value, the different roll-speed in the non-road condition is set.