Method and apparatus for measuring flatness and rolling control

Details Method and apparatus for measuring flatness and rolling control Method and apparatus for measuring flatness and rolling control

1995-05-30

1996-04-23

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

72201, 72 91, B21B 3706

Patent

active

055092853

ABSTRACT:
A rolled strip extending out of a rolling stand is pushed by a push roll to apply a tension to the strip. The flatness measuring surface of a flatness bar is moved above the pass line to measure flatness values at a plurality of points in the widthwise direction of the rolled strip, based on the applied tension. A rolling control apparatus includes an actuator pair disposed symmetrically with drive and work sides of the rolling stand, for adjusting the flatness of the rolled strip, a flatness measuring apparatus provided at the delivery side of the rolling stand for measuring flatness values at a plurality of points in the widthwise direction of the rolled strip immediately after the rolled strip extends out of the rolling stand, based on the flatness measuring method, and a flatness controller for controlling an actuator on the drive side so as to reduce a drive side flatness error calculated from measuring values obtained by the flatness measuring apparatus on the drive side as viewed from the center of the rolled strip, and controlling the other actuator on the work side so as to reduce a work side flatness error calculated from measured values on the work side.

REFERENCES:
patent: 4289005 (1981-09-01), Cabaret et al.
patent: 4537050 (1985-08-01), Bryant et al.
patent: 4633693 (1987-01-01), Tahara et al.
patent: 4726213 (1988-02-01), Manchu
patent: 4809528 (1989-03-01), Lawson et al.

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