| 摘要 |
<p>PURPOSE:To reduce the deviation of sheet width and to improve the yield of product, by performing the correcting rolling of sheet thickness, before the rolling of final finishing pass, and performing edging to a fixed width thereafter. CONSTITUTION:Work rolls 2, 2' for rolling are provided to a mill, and width rolls 8, 8' for edging are also provided to the outlet side of the mill. Further, both of a control board 6, for controlling the hydraulic rolling reduction in the longitudinal direction of a stock 1 to be rolled, and a control board 10, for controlling the sheet width of stock to the prescribed one is accordance with the load variation due to the sheet thickness variation, are provided. First, a rolling of sheet-thickness correcting pass is performed in accordance with the shape of taper plate, before the rolling of final finishing pass. Next, the produced ununiformed width-spread of stock 1 is corrected to the prescribed sheet width, by rolling the stock 1 by means of the width rolls 8, 8', before performing the rolling of final finishing pass. As the final finishing rolling is performed thereafter, the sheet-thickness deviation of a product is reduced, and the yield of the product is improved.</p> |
