Apparatus and method for expanding a tube diameter and a...

Details Apparatus and method for expanding a tube diameter and a... Apparatus and method for expanding a tube diameter and a...

2007-06-05

2007-06-05

Larson, Lowell A. (Department: 3725)

Metal deforming

By relatively receding work-engaging tool-faces

Embodying three or more tools

C072S123000, C072S370080

Reexamination Certificate

active

11127722

ABSTRACT:
A method of expanding a diameter of a tube includes the steps of positioning the tube with one end abutting a stop member, extending a mandrel through an interior passageway of the tube, and expanding a diameter of an expandable head connected to the mandrel as the mandrel is moved in a direction toward the stop member. The diameter of the tube expands in correspondence with the expansion of the diameter of the mandrel. A longitudinal axial force is applied to the tube in a direction toward the stop member as the expandable head expands the diameter of the tube.

REFERENCES:
patent: 1494128 (1924-05-01), Primrose
patent: 2254275 (1941-09-01), Dove
patent: 2780271 (1957-02-01), Ewart et al.
patent: 3041990 (1962-07-01), Le Fiell
patent: 3330145 (1967-07-01), Adolphi
patent: 3735463 (1973-05-01), Merola
patent: 3879977 (1975-04-01), Cauffiel
patent: 4622841 (1986-11-01), Yoshida
patent: 5315854 (1994-05-01), Ledebur

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