METHOD FOR CONTROLLING CROWN OF STRIP IN PAIR CROSS ROLLING MILL

摘要

PURPOSE: A method for controlling crown of a strip in a pair cross rolling mill is provided to accurately calculate the cross angle by predicting and controlling crown of the strip to a very high accuracy in the pair cross rolling mill during hot rolling process. CONSTITUTION: In a method for controlling crown of a strip in finishing milling using a pair cross rolling mill, the method comprises the processes of analyzing the softened values after softening three dimensional plastic deformation of a strip, bending deformation of work rolls, elastic flatness deformation of work rolls generated at the contact part between the strip and the work rolls respectively (322,323,324); comparing crown values calculated by adding up the analyzed bending deformation displacement of work rolls and the elastic flatness deformation displacement of work rolls with a target crown value (325,326); and determining a cross angle conforming to the target crown value by repeating the calculation after adjusting the set cross angle until the calculated crown values are conformed to the target crown value (327).