METHOD FOR CONTROLLING SHEET THICKNESS WITH REVERSIBLE ROLLING MILL

摘要

PURPOSE:To make the top part of a sheet formed by reversible rolling into a product and to improve the yield thereof by determining the estimated layer values of said part on the inlet and outlet sides and correcting quickly the initial set value of rolling reduction. CONSTITUTION:The sheet thickness on the inlet side between a sheet thickness gage 2 on the inlet side and a roll 1 in the next pass is estimated from the estimated sheet thickness value on the outlet side of certain pass. The sheet thickness on the outlet side is estimated before the estimation point for the sheet thickness passes the thickness gage on the outlet side by using the estimated sheet thickness value at the top of the sheet on the inlet side and the measured sheet speeds on the inlet and outlet sides at the point of the time when the estimation point for the sheet thickness passes right under the rolling roll and the initial set value of the rolling reduction of the rolls is quickly corrected therefrom with good accuracy.