Method of controlling roll eccentricity of rolling mill and appa

Details Method of controlling roll eccentricity of rolling mill and appa Method of controlling roll eccentricity of rolling mill and appa

1980-02-21

1981-11-10

Mehr, Milton S.

Metal deforming

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

Sensing tool or tool-linked part

B21B 3708

Patent

active

042991048

ABSTRACT:
A method of controlling roll eccentricity of a rolling mill is disclosed, in which a component of a rolling load variation which is due to eccentricities of an upper and a lower backup rolls of the rolling mill is obtained as a first eccentricity compensation signal by removing a rolling load variation component due to a variation of thickness of a material to be rolled from a rolling load variation occurred during the rolling operation, a rolling load variation value due to the roll eccentricity of the backup rolls is obtained from a rolling load variation occurred during rotations of work rolls which are in contact with each other under a load and is memorized as a second roll eccentricity compensation signal, a first signal is obtained by multiplying the first roll eccentricity compensation signal with a coefficient which is larger than 0 and smaller than 1, a second signal is obtained by multiplying the second roll eccentricity compensation signal with another coefficient which is larger than 0 and smaller than 1, and the first and second signals are added to obtain a roll eccentricity compensation signal for the rolling mill. An apparatus for performing the same method is also disclosed.

REFERENCES:
patent: 3795124 (1974-03-01), Diolot
patent: 3893317 (1975-07-01), Clarke
patent: 3920968 (1975-11-01), Imai et al.

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