PURPOSE: To effectively control the rolling shape of the rolled stock by calculating the water crown of the roll cooling water following to the formation of rolling order, and cooling the roll preliminarily with this water distribution before rolling.
CONSTITUTION: On the hot rolling mill, the thick plate rolling is executed by using the roll cooling device, and making the water crown over from the roll drum central part to the drum end. In this case, the number of zones in the roll drum longitudinal direction is made more than three pieces. The water crown of the roll cooling water is calculated following to the formation of the rolling order during from the roll shift to the beginning of rolling. The roll cooling is executed preliminarily with this water distribution before rolling of the proper rolled stock. Therefore, the effective crown can be enlarged because the roll cooling is executed before rolling with the water distribution calculated for the proper rolled stock.
OE KENICHI
MORIMOTO SADAO
