| 摘要 |
<p>PURPOSE:To obtain a rolled stock which has good plate thickness accuracy by correcting an output plate thickness value from the detection part of a measurement unit by the measurement unit according to a material re-correction quantity. CONSTITUTION:The measurement unit 14b corrects the output plate thickness value Toi from its detection part 14a according to the material recorrection quantity Nni and outputs a plate thickness measured value Tsi which is obtained by arithmetic to a computer 15 for plate thickness control. Consequently, an error based upon the material correction quantity Ni for the current rolled stock is corrected, so the measured value Tsi which is extremely close to a real value is obtained by an X-ray thickness gauge 14. Then the computer 15 compares the measured value Tsi from the thickness gauge 14 with target plate thickness which is inputted in advance and supplies a difference signal DELTAtc corresponding to the plate thickness deviation to a hydraulic pressing device 11a. Consequently, the device 11a controls the work roll gap of a cold rolling machine 11 so that the signal DELTAtc becomes zero at all times. Consequently, the accurate plate thickness measured value which has a small error due to the material is obtained by the thickness gauge 14 and the plate thickness control over the rolled stock is performed according to the deviation of the measured value from the target plate thickness, so the accurate rolled stock is obtained.</p> |
