To stably perform the control of a roll gap, cause no passing trouble due to camber or wedge of a material to be rolled, and stably manufacture a hot-rolled steel strip having a favorable shape, when rolling the material to be rolled by a hot rolling mill having no hydraulic actuator for adjusting a roll gap.
There are set roll gap sensors for measuring each of right and left roll gaps of upper and lower work rolls. The difference δdf between right and left roll gaps of the upper and lower work rolls in rolling are measured with the roll gap sensors. The positions of right and left reduction screws are adjusted at the time of non-rolling based on the difference δdf between the right and left roll gaps so that the difference δdf between the right and left roll gaps are not more than an allowable value (including 0) when rolling a subsequent material.
HAYASHI HIROMASA
OKUBO HIDEKAZU
| JPH06297013A | 1994-10-25 | |||
| JPH09201613A | 1997-08-05 | |||
| JPS6390309A | 1988-04-21 | |||
| JPH05237531A | 1993-09-17 | |||
| JPS57206511A | 1982-12-17 | |||
| JPH06315706A | 1994-11-15 | |||
| JPH06297013A | 1994-10-25 | |||
| JPH09201613A | 1997-08-05 | |||
| JPS6390309A | 1988-04-21 | |||
| JPH05237531A | 1993-09-17 |