METHOD FOR SHAPE CONTROL OF CLUSTER MILL

摘要

PROBLEM TO BE SOLVED: To effectively make nonsymmetric elongation into symmetric elongation, to satisfactorily roll a rolling stock with composite elongation, and to remarkably improve the finished quality of the rolling stock by making the left and right maximum elongation of the rolling stock coincide with each other by a nonsymmetric roll bender control mechanism. SOLUTION: From a detected value detected by a shape detecting mechanism 10, by picking up maximum value and minimum value in the vicinity of the left end of a plate by a left/right maximum elongation computing element 74, the left maximum elongation is found. Simultaneously with that, by picking up the maximum value and the minimum value in the vicinity of a right end, the right maximum elongation is found. A nonsymmetric roll bender control is performed by a nonsymmetric roll bender control mechanism 40 so that these maximum elongation coincides.