Method of controlling edge drop in cold rolling of steel

Details Method of controlling edge drop in cold rolling of steel Method of controlling edge drop in cold rolling of steel

1991-11-26

1993-08-03

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 16, 72234, 72247, B21B 128, B21B 3118, B21B 3702

Patent

active

052318583

ABSTRACT:
A method for controlling edge drop in a cold rolling operation adaptable to tandem cold rolling mill stands by shifting a pair of vertically disposed single-end-tapered work rolls along the widthwise direction of a steel strip. The work rolls have tapered end portions that are disposed on the two widthwise ends of the steel strip. Pairs of work rolls are sequentially mounted on one or more stands and a pair of vertically disposed plain rolls are mounted on at least a final stand, wherein cold rolling is performed so that the thickness offset in the widthwise direction of the steel strip is controlled by independently adjusting the position of the single-end-tapered work rolls according to the following steps: measuring the edge drop at each widthwise end of the steel strip on the outlet side of the final stand; calculating the edge drop offset between the measured amount of the edge drop and a target amount of the edge drop on the final stand outlet side; and individually changing the shift position of the vertically disposed single-end-tapered work rolls in accordance with the edge drop offset at the widthwise ends.

REFERENCES:
patent: 4658620 (1987-04-01), Masui et al.
patent: 4864836 (1989-09-01), Ochiai
patent: 4910988 (1990-03-01), Ikeda et al.

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