Method for suppressing the influence of roll eccentricities on a

Details Method for suppressing the influence of roll eccentricities on a Method for suppressing the influence of roll eccentricities on a

1995-03-27

1997-07-15

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

72 134, B21B 3700

Patent

active

056472382

ABSTRACT:
To suppress the influence of roll eccentricities on a feedback control of a rolling-stock thickness in the thickness control, it is generally known to provide an insensitive dead zone for signal fluctuations caused by the roll eccentricities, and for the zone width of this insensitive dead zone to be varied relative to the magnitude of the signal fluctuations. To prevent actual thickness fluctuation in the rolling stock from leading to a widening of the dead zone, it is provided for the signal fluctuations drawn upon to vary the zone width (x) to be filtered by one or more band-pass filters (26, 27), whose mid-frequencies correspond to the fundamental frequency (.omega.) and, in some instances, to the first or further harmonic component frequencies (2.omega.) of the roll eccentricities (.DELTA.R).

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