摘要 |
<p>PURPOSE: To prevent the deterioration of operability by previously preparing a numerical model taking differences in thickness as parameters and controlling a roll bender and roll shift based on the numerical model in which the measured value of the profile of a sheet is taken as a variable. CONSTITUTION: The differences in thickness to the reference position in plural points (x), (y) where distances from the end of the sheet are different are expressed by Fx, Fy. The edge drop of the metallic sheet to be rolled is expressed by the plural parameters Fx, Fy and the numerical model is previously prepared. The profile of base stock before rolling or the profile on the outlet side of the final stand is continuously measured. Based on the numerical model in which the measured values are taken as variables, the work roll bender, intermediate roll bender and intermediate roll shift at each stand are controlled so that the edge drop on the outlet side of the final stand coincides with the target value. Correction is always executed at each stand, so the breaking of sheet due to the deterioration in shape on the midway is prevented.</p> |