| 摘要 |
PURPOSE:To improve the yield of a product and to improve the quality of the end faces of an edged material by executing the edging of the ends of a material to be rolled in shape adjusting and finish rolling to the specified extent and the shape correction to the prescribed extent just prior to cross rolling in combination. CONSTITUTION:A horizontal roll pair and vertical rolls or plural pairs thereof are arranged and shape correction rolling, cross rolling and finish rolling are executed. The hot rolled steel sheet by end face cutting in succession thereto is produced. The ends of the material to be rolled in the stage of shape adjust ment rolling and finish rolling are subjected to edging for at least >=70mm in total in the longitudinal direction thereof. The shape correction (A-B) is further set at >=10mm in the shape correction rolling just prior to the cross rolling and the shape correction rolling is executed in combination with the edging. The width decrease (C-D) by the non-stationary deformation at the front and rear ends of the rolling material is minimized by the above-mentioned method. The yield of the product is thus improved and the quality of the end face is improved.
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