Cold rolling mill for metal strip

Metal deforming – With use of control means energized in response to activator... – Metal deforming by use of roller or roller-like tool element

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72 21, 72243, 72245, B21B 3700

Patent

active

044818009

ABSTRACT:
A rolling mill system for the continuous rolling of metal strip or strand into a strip of predetermined thickness and straightness is disclosed. The system includes a frame in which two metal working rolls are mounted in such a way that both the distance or nip between the rolls and the tilt of one roll with respect to the other may be regulated by two gap adjusting devices mounted in the roll frame on opposite sides of the centerline of the metal strip. At least one of the gap adjusting devices is operated responsive to a signal representing a measurement of the straightness of the strip product. The gap adjusting devices are hydraulic assemblies wherein each piston is affixed to a piston rod and each piston rod is affixed at its opposite end to a chock block in which the movable roll is carried. A position indicating rod which constitutes part of a position transducer is affixed to the opposite face of each piston to allow for monitoring of the actual distance between the two rolls at each end thereof. The motor drive from one roll is mounted on a door forming part of the roll mill frame to allow for free access to the rolls and chocks. The straightness or camber of the strip product is monitored and the tilt of the movable roll with respect to the other roll is controlled responsive to signals representative of variations in camber.

REFERENCES:
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Javorik et al, "Electrohydraulic System Controls Cold Strip Rolling Mill", Hydraulics & Pneumatics, Jul. '78, pp. 59-61.
Kitao et al, "Advanced Gage Control System in Cold Tandem Mills", Hitachi Review, vol. 28, Oct. 1979, pp. 245-249.

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