| 摘要 |
PURPOSE:To prevent a rolled stock in rough rolling from interfering with a rolled stock in width rolling down and to carry out the rough rolling and the width rolling down simultaneously by rolling down the width while hot slab is supplied from the side of a reversible rough rolling mill to a heating furnace. CONSTITUTION:The heating furnace 1, a width rolling down device 2, a reversible or back pass type rough rolling mill 3 being a 1st rough rolling mill are arranged from the upstream of a line in this order. The slab 7 rolled down in width by the width rolling down device 2 receives, for example, a five-passes reverse rough rolling by the rough rolling mill 3. The slab 7 finished a 2nd pass rough rolling is rolled down in width by the width rolling down equipment as the slab 7 is supplied from the side of the rough rolling mill 3 to the side of the heating furnace 1. By this method, though the rough rolling by the rough rolling mill 3 and the width rolling down by the width rolling down equipment 2 are opened simultaneously, the rear end of the slab finished the 4th pass of the rough rolling and the front end of the slab in width rolling down do not interfere with each other. Consequently, the idle time can be minimized and the production efficiency can be improved. |
