| 摘要 |
PURPOSE:To straighten up efficiently and accurately the flatness of a rolling material by combining the control of an injection flow rate of rolling oil with the control of an oil mix concentration of the rolling oils having different concentrations respectively, in a method of controlling the flatness by a rolling-oil-zone control. CONSTITUTION:Plural kinds of rolling oils having different concentrations respectively, two kinds of oils A and B, for instance, are stored in tanks 10, 20, and maintained to be homogeneous by agitators 11, 21. The oil A is supplied through flow regulating valves 131-133 to a nozzle header 14 by a pump 12. The oil A is supplied through nozzles 141-143 to each zone divided, in correspondence with the specific parts in the width direction of a rolling material 30, into three zones for instance, both side edge parts, 1/4 parts, and a central part. Further, the oil B is supplied by a pump 22 to a header 24 through valves 231-233 of the same system as mentioned above. The headers 14, 24 are made to face the work rolls 41 from the upper and lower sides of the material 30 at the inlet side of a rolling mill 40, and flow rate regulating signals are transmitted to respective flow regulating valves from a control device 60 by a signal outputted from a shape detector 50. In this way, the concentration of mixed rolling oil at each zone and the injection flow rate of mixed oil are controlled. |
