METHOD FOR CONTROLLING EDGER GAP IN ROLLING MILL

摘要

PURPOSE:To enable exact control and to obtain a rolling plate having a desired shape without deformation by measuring the width distribution of the rolling plate on the inlet side of an edger roll and calculating the set quantity of the edger gap by using the measured value. CONSTITUTION:A width gage 4 is provided on the inlet side of the edger roll 1 adjacently to said roll 1 and the width of the rolling plate 3 prior to the entry to the roll 1 is measured. The width distribution W0(X) (X: the distance from the front end of the plate) of the plate 3 is thus determined. The distribution W0 is stored as a width deviation distribution DELTAW0(X) in a width fluctuation memory 5 and is supplied with a time lag to a computer 7 by a time lag device 6. On the other hand, the pass schedule 8 determined preliminarily by an upper computer, etc. and the target width DELTAW3(X)9 required in the outlet of the rolling mill are inputted to the computer 7 and the optimum set distribution DELTAW1(X) of the edger gap to obtain the target width is calculated by the computer 7. Such quantity is fed forward to an edger gap setter 10, by which the edger gap is controlled.