METHOD FOR CONTROLLING THICKNESS IN ROLLING MILL AND DEVICE THEREFOR

摘要

PURPOSE:To set a proper control gain by evaluating the effect equivalent mill rigidity control in distinction from the effect of roll eccentricity. CONSTITUTION:An equivalent mill constant controller 1 is provided with a device 11 for extracting the eccentric component of roll in thickness variation from the actual rolling load at one stand and thickness on the outlet side of the stand, control gain correction value arithmetic unit 12 for determining the correction value DELTAk of control gain from the extracted eccentric component of roll in thickness variation and the control gain (k) of the equivalent mill constant controller 1 and control gain adding/setting device 13 for determing a new control gain from the determined control gain (k) and correction value DELTAk of control gain.