| 摘要 |
PURPOSE:To control a plate thickness and to control a shape without a fluctuation caused by a control lag, to contrive to ensure an accuracy on the outlet side of a rolling mill by predicting the sum of a load fluctuation caused by the plate thickness deviation on the inlet side of the rolling mill and a load fluctuation accompanied with the plate thickness controlling. CONSTITUTION:The rolling mill 10 is provided with a rolling reduction device 11 and a work roll bender device 12, at the time of rolling the plate material 13, controlling the plate thickness and shape is performed by a plate thickness control device 14 and a shape control device 15. The plate thickness device 14 computes a deviation between a detected value by a plate thickness meter 17 and a reference value of the plate thickness, then outputs the required rolling reduction control value to ensure a target plate thickness on the outlet side to the rolling reduction device 11. Further, the shape device 15 given the inlet plate thickness deviation, predicts the load fluctuation of the rolling mill caused by said deviation and predicts the load fluctuation of the rolling mill attending on the plate thickness control by controlling the rolling reduction with the rolling reduction device 11. The shape fluctuation that is mainly a simple elongation caused by the sum total of both load fluctuations is predicted, then the shape controlling value based on this predicted value of the shape fluctuation is outputted to the work roll bender device 12. |
