| 摘要 |
<p>PURPOSE:To improve the accuracy in controlling the thickness at the front end of a steel plate and to prevent generation of a defective part in the thickness in the stage of gnawing in correcting the compressing rate of an oil colum by putting the actual height of the oil column to the correction data and calculating the rate of correction. CONSTITUTION:A detector 13 for the height of an oil column which detects electrically the height of the oil column is provided to a hydraulic cylinder 5 and the output signal from the detector 13 and the output signal from a screw position detector 9 are transmitted to a control device 14 for rolling-down position. A servocontrol valve 10 is controlled by the rate of correcting compression of the coil column calculated by the device 14. On the other hand, the signal corresponding to rolling load is transmitted from a load detector 4 to a process computer 15. The impact load in the stage of gnawing is predicted by the computer 15 and the roll gap of the device 14 is set at a prescribed value.</p> |
