| 摘要 |
<p>PURPOSE:To extremely improve the product yield, by determining the optimum edging amount in the direction L and C from the size of the material and product, by using this optimum edging amount in carrying out the edging pass in the direction C before the broadside rolling pass, and in carrying out the edging pass in the direction L after the broad-side rolling pass, and then, by carrying out the finishing pass. CONSTITUTION:When the thick plate is to be rolled by the thick plate rolling mill comprising the horizontal and vertical rolls, the rolling schedule is made up from the sizes of material and product; in which, the DBT elongation, the spread ratio, the elongation by the finishing pass, and the aimed hot breadth, are determined. The optimum edging amount in the direction L and the optimum crop amount just before the edging pass in the direction L are obtained from aforementioned elongation by the finishing pass; the optimum edging amount in the direction L, and the total breadth transformation by the following rolling schedule, are forecasted, and the aimed hot breadth for realizing the aimed cold breadth is determined. The optimum edging amount in the direction C is calculated from the DBT elongation, the spread ratio, and the optimum crop amount just before the edging pass in the direction L. The finishing pass is carried out after performing the edging passes with the optimum edging amounts in the directions L and C respectively.</p> |
