| 摘要 |
<p>PURPOSE:To reduce a plate thickness deviation at a bitten end part by estimating the variation of a rolling load from a rolling load, a measured value of a roll opening and a rolling speed at the bitten time of the next pass and correcting a roll opening at the biting time of the next pass at each position in the longitudinal direction of a rolled stock. CONSTITUTION:When a rolling load F in a rolling time, a roll opening S and the number W of rotation of a work roll are sent from an AGC controller 8 to a host process computer 10 through a controller 9, a quantity DELTAS of correction of a roll opening at each point in the longitudinal direction of the bitten end part is calculated and outputted to the controller 9. Further, a control point in the longitudinal direction after the plate is bitten in is detected by the number of rotation of the work rolls from a pulse generator 7 through a controller 9 and a quantity DELTAS of correction of a roll opening to be controlled is outputted to a servo pump 11 through the AGC control board 8. The roll opening S between the work rolls 3, 3 can be changed and controlled by operating a hydraulic cylinder 4 through a servo valve 12 to a prescribed value.</p> |
