METHOD FOR CONTROLLING CROWN AND FLATNESS OF HOT ROLLED STRIP

摘要

PURPOSE: A method for controlling crown and flatness of a hot rolled strip is provided which performs superior rolling by controlling rolling of the strip in feedback and feedforward processes after measuring a shape of the strip between a plurality of rolling machines. CONSTITUTION: In a method for controlling crown and flatness of a hot rolled strip(9) which is rolled as passing through a plurality of rolling machines(F1-F7), the method for controlling crown and flatness of the hot rolled strip(9) comprises the processes of measuring a shape of the hot rolled strip proceeding among the plurality of rolling machines(F1-F7); and controlling bending forces and pair cross angles of the plurality of rolling machines(F1-F7) using the measured shape data of the hot rolled strip(9), wherein a crown of the hot rolled strip is feedback controlled at a plurality of rolling machines(F1-F7) which are positioned in front of the proceeding hot rolled strip(9) based on a point measuring the shape of the hot rolled strip, and a flatness of the hot rolled strip is feedforward controlled at a plurality of rolling machines(F1-F7) which are positioned in the rear of the proceeding hot rolled strip based on the point measuring the shape of the hot rolled strip.