Plate thickness controller for continuous roll mill

Abstract

To provide a plate thickness control system for a continuous rolling mill which improves accuracy on plate thickness control by formulating and regulating the influence which the correction amount of screw down position gives to the tensile force between rolling mills, and by making it easy to set up an output threshold value. This system comprises a measurement means to measure a plate speed variation Delta Vout at the exit of a rolling mill 12, a measurement means to measure a plate speed variation Delta Vin at the entrance of a rolling mill 13, a measurement means to measure a correction amount of screw down position Delta V Sn at the rolling mill 12 and the correction amount or screw down position Delta V Sn+1 at the rolling mill 13, a measured quantity calculation means 17 to calculate a measured quantity Pout ,n <(-)> , Pin ,n+1 <(+)> which affects accuracy on the plate width of the workpiece based on the plate speed variation Delta Vout , Delta Vin and the correction amount of screw down position Delta V Sn , Delta V Sn+1 , and a control output adjustment means 18 to adjust a plate control output during rolling the workpiece, using a measured quantity.

Description

technical field [0001] The present invention relates to a plate thickness control device for a continuous rolling mill that performs plate rolling, and in particular to a continuous rolling mill plate thickness control device that can adjust the control output in consideration of the influence of the quality imbalance of the control output on the lateral accuracy of the material to be rolled. Background technique [0002] Image 6 Shown is a block configuration diagram of a conventional continuous rolling mill thickness control device described in, for example, Japanese Patent Publication No. 6-71616, showing the most representative thickness control methods of the thickness gauge method and the An example of thickness control by monitoring method. [0003] exist Image 6 Among them, the rolling phenomenon in the rolling mill 2 controlled by the reduction device 1 is represented by calculation elements 3 and 8, and the thickness gauge type thickness control device and the mo...

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Problems solved by technology

[0031] As mentioned above, the conventional continuous rolling mill plate thickness control device is required to set the control output on the basis of considering the adverse effect on the lateral accuracy caused by the increase of the tension between the rolling mills, but it cannot be realized, so the resulting problem is that , can not get enough plate thickness control accuracy

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