| 摘要 |
<p>PURPOSE:To decrease the roll edge wear of work rolls and to prevent the generation of edge cracks and edge marks by shifting continuously back and forth the work rolls plural times in the axial direction of the rolls during cold rolling and rolling a material to be rolled. CONSTITUTION:The roll edge wear of the work rolls is decreased in a cold rolling mill which supports at least one work roll out of a pair of the work rolls with intermediate rolls and supports the intermediate rolls with >=2 pieces of back up rolls. More specifically, the upper and lower work rolls 4, 5 are moved back and forth in the operating side direction and the driving side direction during rolling, then the contact parts between the end of the rolling material 10 and the work rolls 4, 5 changes continuously and therefore the generation of the local roll edge wear to the work rolls 4, 5 is obviated and the roll wear disperses in the shifting range of the work rolls 4, 5. The generation of the edge marks and edge cracks is prevented by the dispersion of the roll wear.</p> |
