| 摘要 |
<p>PURPOSE:To prevent the fluctuation of plate thickness caused by the eccentricity of each of upper and lower backup rolls by adding a quantity of correction of a roll gap to cancel the eccentric quantity of a backup roll to the quantity of correction of the roll gap from a plate thickness controller. CONSTITUTION:A detecting device 7 of roll eccentricity stores an amount of displacement of a roll gap when a roll gap is adjusted so that a rolling load takes a prescribed value in accor dance with rotation angle of of each of upper and lower backup rolls. An eccentric quantity of one of upper and lower backup rolls is subtracted from the stored value, an eccentric quantity of the other unknown roll is calculated, which is stored according to the rotation angle of each of the upper and lower backup rolls. A roll eccentricity detecting device 7 is connected to an eccentric correcting device 8 via a signal. A roll gap correction quantity canceling the eccentric quantity of each roll corresponding to the rotation angle of each of the upper lower backup rolls 2a, 2b is added by the device 8 to the correcting quantity of the roll gap as an output signal from a plate thickness correcting device 9.</p> |
