| 摘要 |
PURPOSE:To efficiently smoothen the surface of a rolling mill, by a method wherein a worn end part of a roll is detected by a sensor without detaching the roll from a stand, and is polished by jetting an abrasive slurry onto the surface of the roll by high-pressure water. CONSTITUTION:When the sensor 9 is moved along the work roll 1, an electrical signal outputted from the sensor 9 varies as indicated by (a) in the figure. The signal is converted into an electric signal as indicated by (b), by being differentiated by a signal-processing circuit 10. Based on the thus differentiated signal, a controlling circuit 11 detects the position A of the worn end part of the work roll 1, and a controlling signal for moving nozzles 4, 7 to the position of the worn end part is outputted to a motor 13 through a power amplifier 12. When positioning of the nozzles 4, 7 is completed, the work rolls 1 are rotated in the directions of arrows, and the abrasive slurry supplied through the nozzles 7 for the slurry is jetted toward the surfaces of the rolls 1 by spraying high-pressure water from the nozzle 4 for the water. Accordingly, the surfaces of the rolls 1 are polished and smoothened. |
