CONTROL METHOD OF MEANDERING IN THICK-SHEET ROLLING

摘要

PURPOSE:To prevent a stock to be rolled from producing camber by computing the wedge quantity of the stock from the roll-gap difference between both sides of rolls and correcting a rolling-reduction position based on the quantity obtained bymultiplying the correcting quantity of roll-gap difference of a proportional gain. CONSTITUTION:A wedge quantity DELTAhdf2 is obtained by a computing unit F2 from the present value Sdf of a roll-gap difference between both sides of rolls during rolling. Next, wedge quantity DELTAhdf3 is obtained by a computing unit F3 from the present value delta of a meandering quantity. The wedge quantity DELTAhdf1 of a stock to be rolled is obtained from these wedge quantities DELTAhdf2 and DELTAhdf3 to obtain the correcting quantity DELTASdf1 of the roll-gap difference between both sides of rolls from DELTAhdf1 with the aid of a computing unit F1 by using an equation. Next, a roll-gap difference correcting command Sdf obtained by multiplying the correcting quantity Sdf1 by a proportional gain K1 is transmitted to a hydraulic rolling-reduction device to perform the correction of rolling reduction.