| 摘要 |
PURPOSE:To exactly detect and control a roll gap in roll barrel parts and to improve the dimensional accuracy of a product by detecting the gap of the barrel parts by roll gap detectors and controlling a hydraulic control valve by the deviation between the detected value and a reference gap. CONSTITUTION:The gaps y1-y4 in the roll barrel parts are detected by the position-adjustable roll gap detectors 19, 20 and the change rate DELTAy of the roll gap which is the average value thereof is calculated by an arithmetic unit 24. The DELTAy is corrected to the change rate DELTAx of the gap in a vertical direction by a device 25 for correcting an angle of inclination and an elastic change rate DELTAxe is added thereto in an adder 29, by which the change rate DELTAxD the roll gap is calculated. The deviation DELTAx'D between the DELTAxD and the reference quantity DELTAx0 is calculated in an adder 31 and the control valve 38 is controlled by such deviation, by which the rolling reduction is controlled. Since the roll gap is exactly detected in the barrel parts and the control is executed, the dimensional accuracy of the product is improved. |
