| 摘要 |
<p>PURPOSE:To equalize the edge drop quantity while preventing the generation of deterioration of flatness and an operation trouble attending on it by constituting the rolling mill so that the edge drop quantity of each of a working side and a driving side can be controlled independently, and also, the variation of flatness can be corrected. CONSTITUTION:When tapered working rolls 2A, 2B are shifted in the transverse direction of a steel plate 5 and the edge drop amount of a rolling stock is controlled by a working roll shifting position controller 9, edge drop quantities dws, dds at a working side and a driving side are measured by an edge dropping meter 6 provided on the delivery of a rolling mill, and based on the difference of measured values dws, dds and target values dws', dds' of the edge dropping quantities of each of the working side and the driving side, the shift positions of the upper and the lower working rolls 2B, 2B are corrected, and rolling stock shape variations DELTAbetaws, DELTAbetads by the correction of the shift positions concerned are corrected by a bender force correction quantity DELTAF, and a rolling reduction leveling correction quantity DELTASL of the working rolls 2A, 2B.</p> |
