A newly developed plate shape control system, using a laser type shape meter, was put in service in the plate mill in Mizushima Works of Kawasaki Steel. This system consists of (1) sensors: shape meter and multi head #gamma#-ray thickness meter (crown meter), (2) actuator: work roll bending device, and (3) models: newly developed shape prediction model based on data measured by the shape meter and plate crown prediction model. This system is characterized in that the setting of the roll bending force for the next pass is determined on the basis of the results of shape and crown measurement. Introduction of this system enables the improvement of flatness and plate crown accuracy, which meets ever upgrading customer's demand and contributes to yield improvement and chance free rolling.
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