Method of controlling elimination of roll eccentricity in rollin

Details Method of controlling elimination of roll eccentricity in rollin Method of controlling elimination of roll eccentricity in rollin

1987-04-28

1989-07-25

Larson, Lowell A.

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 20, 72 21, 72241, 364472, B21B 3708

Patent

active

048502111

ABSTRACT:
A rolling load signal is detected during a few rotations of a top and a bottom backup roll at different detection time points at which the top and bottom backup rolls are out of phase from each other and then are analyzed by Fourier analysis so as to detect the amplitudes and phases of the eccentricity of the top and bottom backup rolls separately, whereby the roll gap is controlled and the separately detected eccentricity of the top and bottom backup rolls is thus obtained. Even when there is a difference in roll eccentricity frequency between the top and bottom backup rolls and even when external disturbances exist due to the aging of the roll eccentricity and to the estimated errors of the mill constant M and the plasticity coefficient Q of a piece of metal to be rolled, the roll eccentricity can be suitably adjusted so that the roll eccentricity can be detected with a high degree of accuracy and then eliminated.

REFERENCES:
patent: 3709009 (1973-01-01), Shiozaki et al.
patent: 4222254 (1980-09-01), King, Jr. et al.
patent: 4531392 (1985-07-01), Puda
patent: 4580224 (1986-04-01), Gerber
patent: 4691547 (1987-09-01), Teoh et al.

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