Control system and method for switching pivot stands in a tandem

Details Control system and method for switching pivot stands in a tandem Control system and method for switching pivot stands in a tandem

1991-09-23

1993-08-17

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 14, 72 29, 72234, B21B 3700

Patent

active

052358348

ABSTRACT:
In a master speed regulator system for a multi-stand rolling mill, a control system and method for switching a pivot stand via a bumpless transfer back and forth from the second stand to the last stand depending on the phases of the mill and while the mill is operating. A microprocessor is used for recalculating the master speed reference B1, the integral values for the master speed reference integral controller, and the outputs for the tension/automatic gauge integral controllers for the new pivot state based on conditions of the previous pivot state.

REFERENCES:
patent: 1871437 (1932-08-01), Winne
patent: 3030836 (1962-04-01), Gochenour
patent: 3036480 (1962-05-01), Schwab
patent: 3212310 (1965-10-01), Brys
patent: 4011743 (1977-03-01), Peterson et al.
patent: 4998427 (1991-03-01), Peterson et al.

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