Method for controlling continuous rolling mill and control appar

Details Method for controlling continuous rolling mill and control appar Method for controlling continuous rolling mill and control appar

1983-02-01

1985-03-26

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

72234, 72240, B21B 3714

Patent

active

045065322

ABSTRACT:
The invention provides a method for controlling a continuous rolling mill having at least ith and (i+1)th stands and a control apparatus therefor, wherein an exit strip thickness reference value of an automatic gauge control is changed in accordance with a predetermined strip length during size changing and roll gap is corrected so as to change a strip thickness at an exit side of the ith stand, when a size (e.g., thickness) is changed during rolling, and, at the same time, a roll peripheral speed of the ith stand is changed in correspondence with a change in forward slip (a change in entry strip thickness, a change in exit strip thickness, and a change in resistance to deformation) of the ith stand as well as changes in forward slip, exit strip thickness, entry strip thickness and roll peripheral speed of the (i+1)th stand, so as to make the strip speed at the exit side of the ith stand coincide with that at the entry side of the (i+1)th stand, thereby minimizing the interstand tension and performing smooth size changing.

REFERENCES:
patent: 4011743 (1977-03-01), Peterson et al.
patent: 4030326 (1977-06-01), Morooka et al.
patent: 4335435 (1982-06-01), Miura
IAS, Annual Meeting, IEEE Industry Applications Society, 1977 K. Sekiguchi, "Dynamic Schedule Change In Tandem Cold Mill".

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