Method and device for controlling strip thickness in rolling mil

Details Method and device for controlling strip thickness in rolling mil Method and device for controlling strip thickness in rolling mil

1988-10-04

1990-03-13

Bray, W. Donald

Metal deforming

With use of control means energized in response to activator...

Metal deforming by use of roller or roller-like tool element

72 11, 72 16, 72 20, 364472, B21B 3700

Patent

active

049074342

ABSTRACT:
The present invention relates to a method and device for controlling a thickness of a strip in a rolling mill which has a roll gap adjusting device and a rolling speed adjusting device. Rolling environment disturbances received by the mill are classified into a first disturbance for which only the rolling speed should be compensated, a second disturbance for which only the roll gap should be compensated, and a third disturbance for which both the rolling speed and the roll gap should be compensated. The values of the first, second and third disturbances are estimated, based on detected values of a variation of a roll force exerted on the given rolling stand, variations of a thickness of the strip on the downstream and upstream sides of the given rolling stand, and a variation of a tension of the strip on the upstream side of the given rolling stand. The roll gap adjusting device and the rolling speed adjusting device are operated, depending upon the estimated values of the first, second and third disturbances, to thereby control the thickness of the strip.

REFERENCES:
patent: 3248916 (1966-05-01), Kenyon et al.
patent: 3592031 (1971-07-01), Sutton et al.
patent: 3694636 (1972-09-01), Smith, Jr.
patent: 4293825 (1981-10-01), Morooka et al.
patent: 4485497 (1984-12-01), Miura

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