| 摘要 |
PURPOSE:To improve the quality of a product by performing edging by vertical rolls and elongating by horizontal rolls in forward rolling in the former rolling stage and performing the edging and the elongating at the same time in backward rolling in the latter rolling stage. CONSTITUTION:Vertical rolls 3 and horizontal rolls 4 are continuously arranged on a rolling line. In the former rolling stage for forming the projecting pat of a stock 5 body; the edging of rolling stock 5 and the centering of a passing position as well as the elongating of stock 5 by the horizontal rolls 4 are performed in the forward rolling from the rolls 3 to the rolls 4. The stock 5 is freely passed without rolling it in the succeeding backward rolling, because the centering is impossible. In the latter rolling stage; only the elongating by the rolls 4 is performed in the forward rolling, and both edging and elongating or stock 5 are performed in the backward rolling. In this way, a present blooming installation can be used, and the quality of a product 6 is improved. |
