| 摘要 |
PURPOSE:To increase an edging amount and to reduce the number of required molds by alternately performing edging stages by an edging press and thickness drafting stages by a rough rolling mill at least one time for rolling of a non-ferrous metal slab. CONSTITUTION:In the case that a non-ferrous metal slab (a) to be rolled roughly is hard and thick, the slab (a) is edged by an edging press 8 after the slab (a) is passed through a rough rolling mill 10 to perform a thickness drafting stage. Again, a thickness drafting stage is performed by reverse rolling by the mill 10 and the slab (a) is again passed through the edging press 8 to perform a 2nd edging. Reverse rollings by the mill 10 and edgings by the press 8 are alternately repeated as necessary. Finally, a shape defective part, that is, crop parts in the top and rear end parts of the slab (a) are cut by a shear 11. |
