Four-roller bending and rounding machine

Details Four-roller bending and rounding machine Four-roller bending and rounding machine

1979-10-09

1982-01-26

Larson, Lowell A.

Metal deforming

By deflecting successively-presented portions of work during...

By use of deflectors arranged to bend work longitudinally of...

72241, 72110, B21B 1314, B21B 1500, B21D 1304

Patent

active

043122086

ABSTRACT:
A tube-making machine has a pair of axially spaced end supports between which upper and lower bending rollers extend axially. These rollers have ends journaled in the supports with the upper roller vertically limitedly displaceable in the support and the lower roller vertically nondisplaceable. A pair of axially extending side rollers horizontally flanking the upper and lower rollers have ends also journaled and vertically limitedly displaceable in the supports. A C-shaped rigid member lying generally in a plane between the supports and perpendicular to the axes of the rollers has rigid upper and lower arms respectively juxtaposed with the upper and lower bending rollers. Respective upper and lower support rollers are urged by respective upper and lower hydraulic cylinders respectively downwardly and upwardly into engagement with the upper and lower bending rollers at the plane to prevent deflection of these rollers during operation of the machine for bending or crimping. The C-shaped member with the support rollers can be pivoted between a position embracing the upper and lower rollers as described above and a position offset therefrom to allow rounding of a tubular workpiece by the machine.

REFERENCES:
patent: 518765 (1894-04-01), Plecker
patent: 965018 (1910-07-01), Saunders
patent: 2043665 (1936-06-01), Iversen et al.

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