Sag compensating roll for roll presses

Details Sag compensating roll for roll presses Sag compensating roll for roll presses

1990-07-18

1991-07-23

Eley, Timothy V.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

291131, 291132, B21B 3132

Patent

active

050331760

ABSTRACT:
A sag compensating roll having a stationary yoke for taking up bending forces, a hollow roll shell surrounding the yoke and hydrostatic support elements between the yoke and the shell. Each support element having a pressure shoe facing the inner surface of the shell defining a slide surface at the shell. Relief pockets recessed into the slide surface. A pressure space defined between a first piston on the yoke and the pressure shoe, and the shoe is radially movable with respect to the first piston. A pressure fluid line communicates with the pressure space and, by capillaries from the pressure space, communicates with the relief pockets. The pressure space and the relief pockets are dimensioned so that the active surface of the relief pockets is larger than the active surface of the pressure space acting on the support element. A further fluid supply line delivers temperature equalization fluid to an additional pocket located at the circumferentially downstream trailing side of the pressure shoe, at the inner surface of the roll shell. The further fluid is picked up by the inner surface of the roll shell after the shell has moved past the relief pockets. Pressure and/or quantity control between a common source of pressure fluid and each of the pressure fluid line and the additional fluid line may be provided.

REFERENCES:
patent: 3997953 (1976-12-01), Christ et al.
patent: 4241482 (1980-12-01), Biondetti
patent: 4394793 (1983-07-01), Pav et al.
patent: 4776069 (1988-10-01), Snellman
patent: 4815183 (1989-03-01), Bondetti
patent: 4856157 (1989-08-01), Kusters
patent: 4955120 (1990-09-01), Brendel et al.

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