CONTROL METHOD FOR PLATE THICKNESS BY HOT CONTINUOUS ROLLING MILL

摘要

PURPOSE: To provide a control method for a plate thickness by a hot continuous rolling mill by which the plate thickness of a rolling stock can be controlled with a few errors by suppressing the variations of time series errors even in the case of plural rolling stands. ;CONSTITUTION: It is necessary to previously obtain respective actual values of the deviation Δh of an intermediate plate thickness to be measured when the tip part of a rolling stock 12 passes through a plate thickness meter 10 between rolling stands, the correction quantities ΔS of drawing down in the respective rolling stands, and the deviation of the final plate thickness of the tip part of the rolling stock 12 at the time of previous rolling. Successively, when rolling the same kind of a rolling stock as that at the time of previous rolling to the same final plate thickness, the correction quantities ΔS of drawing down in the respective rolling stands are determined according to ΔS = G.f (Δh-b) by correcting a drawing down correcting gain G and the offset quantity (b) of the deviation Δh of the intermediate plate thickness by the deviation Δh of the intermediate plate thickness of the tip part of the rolling stock 12 to be measured and respective actual resultant values.;COPYRIGHT: (C)1996,JPO