| 摘要 |
When rolling a steel slab along its edges to reduce its width the head end of the slab may experience a larger percentage reduction than the mid portions of the slab. A similar situation, but to a less marked extent may occur at the tail end of the slab. To avoid this disadvantage workpieces are rolled in a vertical mill stand and the roll gap of the mill stand is automatically controlled during rolling. In the combination of a vertical mill stand and a horizontal mill stand in which slabs are successively edge and flat rolled an automatic control system is employed to control means for adjusting the roll gap of the vertical stands during the rolling of at least a terminal length of the slab adjacent an end so as to produce a width profile such that after subsequent horizontal rolling the width of the terminal length is not less than the width of the remainder of the slab. |
