Tube expanding and grooving tool and method

Details Tube expanding and grooving tool and method Tube expanding and grooving tool and method

1984-10-12

1987-03-03

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

With metal deformation of different type

291573A, 291573AH, 29523, B21D 3920, B21D 5300

Patent

active

046465480

ABSTRACT:
A method and a tool for expanding the outside diameter and forming grooves on the inside surface of a tube. The tool comprises an axially extending mandrel, a centering portion, and a grooving portion. The centering and grooving portions of the tool are both secured to the mandrel, with the grooving portion located axially rearward of the centering portion. The centering portion radially projects outward of the mandrel, and the grooving portion is coaxial with and radially projects outward of the central portion of the tool. The central portion defines a smooth annular surface to engage and partially expand the tubes, inside and outside diameters, to guide the tube onto the grooving portion, and to maintain the grooving portion centered within the tube. The grooving portion defines an outside surface to expand the tube further, and preferably includes a plurality of external fins to form grooves on the inside surface of the tube.

REFERENCES:
patent: 1465073 (1923-08-01), Davis
patent: 1646384 (1927-10-01), Bergstrom
patent: 2004389 (1935-06-01), Jones
patent: 2145588 (1939-01-01), Findlater
patent: 2363476 (1944-11-01), Bannister
patent: 4031738 (1977-06-01), Schonfield et al.
patent: 4248179 (1981-02-01), Bonner
57-72730, Patent Abstracts of Japan, vol. 8, No. 32, (M-275), (1469), 2/10/84.

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