| 摘要 |
<p>PURPOSE:To save the energy required for rolling by dividing plural rolling mills into three stages, and controlling the sheet thickness of a material under a high draft rolling at the front stage, and establishing its quality at the middle stage, and finally rolling it into a desired cross-sectional shape at the rear stage by providing on-line grinders to the rear stage. CONSTITUTION:The mills F4, F5 at the front stage A perform the high draft rolling of the material W while performing the crown controls of them by driving both of their large diametral work rolls 1, 2. The mills F4, F5 at the middle stage perform the high draft rolling within their prescribed temperature ranges by making their upper work rolls 9 small in diameter, and establish the quality of material W at the same time, The mills F6, F7 at the rear stage perform the finish rolling by making their upper work rolls 15 further smaller in diameter, and simultaneously finish the cross-sectional shape of material W into a desired dimensional accuracy by performing the crown controls of them by means of intermediate rolls. The on-line grinders 13, 23, etc. grind the outer peripheral surfaces of work rolls 9, 15, etc. during rolling, to make the rolling schedule of installation free.</p> |
