METHOD AND DEVICE FOR CONTROLLING WIDTH OF MATERIAL TO BE ROLLED IN CONTINUOUS HOT ROLLING MILL, AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To sufficiently control the width dimension of a material to be rolled and to reduce the deviation in the width dimension of the material to be rolled on the outlet side of the final stand. SOLUTION: Whenever an actual intermediate width dimension Wa.act is geven from a 1st width meter 11, the intermediate width deviationΔWa between the given target intermediate width dimension Wa.act and the target intermediate width dimension Wa.cal given from a target intermediate width learning machine 14 is calculated with a 1st computing element 21, an opening degree adjusting valueΔS is calculated using the obtained intermediate width deviationΔWa and it is given to a 1st selector 31. In the 1st selector 31, in the case that the last width deviationΔWb>0 and the opening degree adjusting valueΔS is larger than the opening degree adjusting valueΔS1 which is given at the previous time, or in the case ofΔWb<0 andΔS<ΔS1, the opening degree adjusting valueΔS1 given at the previous time is selected and, in the case that it is neither case, the opening degree adjusting valueΔS is selected and it is given to an opening degree controller 3.