Method and circuit for flatness control in rolling mills

Details Method and circuit for flatness control in rolling mills Method and circuit for flatness control in rolling mills

1984-08-31

1986-05-13

Husar, Francis S.

Metal deforming

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

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

72 17, 72243, 72247, 7386207, B21B 3706, B21B 3708

Patent

active

045878196

ABSTRACT:
A method for controlling flatness in cold-rolling mills having a roll stand with at least six rolls including intermediate and working rolls capable of being deflected, includes measuring tensile stress distribution over the width of a strip to be rolled having central and edge regions, comparing the measured tensile stress distribution with a desired predeterminable tensile stress distribution, determining a deviation at the central region of the strip between the measured and desired tensile stress distribution, determining a deviation at the edge region of the strip between the measured and desired tensile stress distribution, forming a strip center coefficient from the central region deviation in the form of a deviation control for influencing deflection of the intermediate roll, and forming a strip edge coefficient from the edge region deviation in the form of a deviation control for influencing deflection of the working roll, and a circuit for carrying out the method.

REFERENCES:
patent: 4262511 (1981-04-01), Boisvert et al.
patent: 4269051 (1981-05-01), Clarke et al.
patent: 4400957 (1983-08-01), Carlstedt et al.

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