Looper control system for continuous rolling mill

Details Looper control system for continuous rolling mill Looper control system for continuous rolling mill

1990-02-06

1991-08-20

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 17, 72 19, 72 21, B21B 3706

Patent

active

050403958

ABSTRACT:
There is disclosed a looper control system for a continuous rolling mill comprising: a section for performing the integral operation of respective deviations between measured values and target values with respect to the tension and the looper angle, and the proportional operation of respective deviations between the tension, the looper operation angle, and the rotational speed of the looper motor at the time of start of the control and those at the present time to synthesize values thus obtained to deliver them to the looper current control unit or the looper control unit, a section for performing the integral operation and the proportional operation similar to the above to synthesize the values thus obtained to deliver them to the main motor speed control unit; and an optimum gain setting unit for correcting respective proportional gains in dependency upon the speed of the main motor. The system may additionally have a section for altering the optimum gain by the fact that the tension is extreme and/or the looper angle is extreme.

REFERENCES:
patent: 4507946 (1985-04-01), Koyama et al.
Y. Seki et al., "Optimal Multivariable Looper Control for Hot Strip Finishing Mill", 1988 IEEE Industry Applications Society Annual Meeting, IEEE Catalog No. 88CH2565-0, Oct., 1988, pp. 1201-1206.

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