METHOD FOR CONTROLLING SHEET THICKNESS AND SHAPE ON HOT CONTINUOUS ROLLING MILL

摘要

PURPOSE:To manufacture the products of required sheet thickness from the toppest end part by correcting the bending force of the work roll at the same time on correcting the position of the roll reduction, and on following this correction, correcting the position of rolling reduction again. CONSTITUTION:By passing the material to be rolled 1 through, the deviation of sheet thickness of the top end is detected with the sheet thickness detector 7. The deviation of sheet thickness of the backward stand is estimated with the sheet thickness deviation caluculator 8 from this detected value. The correcting amount of the rolling reduction position so as to make this sheet thickness deviation to zero at the outlet of the final stand is caluculated with the rolling reduction position correcting command caluculator 9, the device for the rolling reduction 4e, 4f, 4g correct the position of rolling reduction. The bending force correcting amount for preventing the sheet shape from deforming due to the correction of the rolling reduction position is caluculated with the bending force correcting command caluculator 11, the work roll benders 6e, 6f, 6g correct the bending force. The flat products of required sheet thickness can be manufactured from the toppest end of the material to be rolled.