| 摘要 |
<p>PURPOSE:To obtain the target sheet crown while the occurrence of partial wear of work rolls is obviated. CONSTITUTION:In the CVC method using a hot rolling mill provided with a coupler of upper and lower work rolls 3 having prifiles of a bottle shape, respectively and arranged so as to be made to point symmetry mutually on a vertical cross section and a work roll bending device 2, the upper and lower work rolls 3, 3 are shifted in the axial direction in the reverse direction mutually for rolling material where the shift instruction positions for the upper and lower work rolls 3, 3 do not exceed the shiftable limiting position. The shift quantities of the upper and lower work rolls 3, 3 are then varied periodically in the shiftable range for the rolling material where the shift instruction positions for the upper and lower work rolls 3, 3 exceed the shiftable limiting position and the bending force by the work roll bending device 2 is given.</p> |
