Interstand tension controller for a continuous rolling mill

Details Interstand tension controller for a continuous rolling mill Interstand tension controller for a continuous rolling mill

1994-10-05

1997-08-26

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

72 123, 72205, 723652, 72 86, B21B 3700

Patent

active

056600666

ABSTRACT:
An interstand tension controller for a continuous rolling mill having a plurality of rolling stands and provided with a looper between the adjacent rolling stands controls two controlled variables, i.e., the interstand tension of the workpiece and the looping angle of the looper, to adjust the measured interstand tension and the measured looping angle to desired values, has control loops that control the rotating speed of the rolls of the rolling stand and the looping torque or the looping speed of the looper to regulate the interstand tension and the looping angle, estimates disturbances acting on the control loops, the variation of the characteristics of the controlled system and the interference between the control loops, and operates manipulated variables to offset the disturbances.

REFERENCES:
patent: 4379395 (1983-04-01), Konishi et al.
patent: 4507946 (1985-04-01), Koyama et al.
patent: 5040395 (1991-08-01), Seki et al.
patent: 5043863 (1991-08-01), Bristol et al.
patent: 5103662 (1992-04-01), Fapiano
patent: 5233852 (1993-08-01), Starke
patent: 5325692 (1994-07-01), Hoshino et al.
patent: 5404738 (1995-04-01), Sekiguchi

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