METHOD FOR CONTROLLING CAMBER IN ROLLING OF THICK PLATE

摘要

PURPOSE:To make possible precise camber control in rolling of a thick plate by controlling right and left roll gaps so as to meet with the target rotating angular speed in the horizontal plane set from the camber shape and wedge quantity of a rolling material after rolling. CONSTITUTION:Thickness gages 3, 3' and camber shape detector 5 are disposed on the outlet side of a rolling mill 1. The wedge quantity and camber quantity which are the difference between the right and left thicknesses of the rolling material 10 after rolling and the camber shape which is the camber curvature thereof are detected. The change of the target wedge rate in the rolling of the succeeding pass is calculated from the detected value and further the target rotating angular speed pattern within the horizontal plane is set. The difference between the right and left roll gaps is corrected by operating roll gap setters 9, 9' in such a manner that the value detected by a detector 4 for the rotating angular speed within the horizontal plane attains the above-mentioned target rotating angular speed pattern. The camber control with the high accuracy is thus made possible.