Recording medium, apparatus and its plate width control method of the material to be rolled in hot continuous rolling mill

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 deviation ΔWa 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 value ΔS is calculated using the obtained intermediate width deviation ΔWa and it is given to a 1st selector 31. In the 1st selector 31, in the case that the last width deviation ΔWb0 and the opening degree adjusting value ΔS is larger than the opening degree adjusting value ΔS1 which is given at the previous time, or in the case of ΔWb0 and ΔSΔS1, the opening degree adjusting value ΔS1 given at the previous time is selected and, in the case that it is neither case, the opening degree adjusting value ΔS is selected and it is given to an opening degree controller 3.