| 摘要 |
<p>PURPOSE:To improve the plate shape control accuracy by installing a lubricating oil supplier and a coolant device in the inlet and the outlet side of a rolling mill, respectively. CONSTITUTION:A coolant device 7 and a shape sensor 6 detecting the shape of a rolled plate 5 are installed at the outlet side of a rolling mill 1 as well as a lubricating oil supplier 10 is installed at the inlet side of the mill 1. If the plate shape detected by the sensor 6 is such that the plate center part is projected more than end parts, coolant injection from an injection nozzle 9 at both ends of the coolant device 7 is stopped and the lubricating oil suppler 10 injects the lubricating oil from only both end injection nozzles 12. In this method, thermal expansion of the part of work rolls 2 on which the coolant is injected is restrained and the rolled plate 5 is elongated at the part supplied with the lubricating oil. Therefore, this method controls the plate shape of the plate 5 with high accuracy.</p> |
