| 摘要 |
<p>PURPOSE:To prevent the variation of sheet thickness caused by the eccentricity of a back-up roll having the difference in circumference, by detecting a periodical pressure difference occurring correspondingly to a rotating angle of the back- up roll, and correcting a rolling reduction automatically. CONSTITUTION:A rolling mill is driven in a roll kissing state having no rolling material 1, to store a load P detected by a rolling load detector 6, and rotated angles theta1, theta2 detected by rotating angle detectors 7 provided respectively to back-up rolls 3, in a roll eccentricity storing controller 8. The extent DELTASe' of the variation of a roll gap caused by the roll eccentricity corresponding to a rotating angle theta1 is inputted to a sheet thickness controlling device 9 to calculate it, and the corrected rolling reduction command DELTASr is outputted to a rolling reduction device 4 to control the gap. The variation of sheet thickness caused by the change of the characteristic properties of a rolling material and the periodical variations of sheet thickness caused by the roll eccentricity are controlled to improve the quality of a rolling material, by installing this control system parallelly to a gauge meter AGC.</p> |
