Apparatus and method for forming external raised beads on hollow

Details Apparatus and method for forming external raised beads on hollow Apparatus and method for forming external raised beads on hollow

1991-12-06

1993-02-16

Bray, W. Donald

Metal deforming

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

Spherical tool

72123, B21B 2706

Patent

active

051860333

ABSTRACT:
Apparatus and method for forming external raised beads on hollow rigid tubing. The apparatus includes an adjusting screw threadably mounted into a threaded body member having one or more balls mounted in apertures in the body member. The body member is inserted into one end of the hollow tubing, the balls being disposed inside of the body member between a reduced diameter portion of the screw and the inner wall of the body member. When the screw is threaded into the body member, the balls are forced outwardly against the inner wall of the tubing forming a raised bead on the exterior of the tubing. Continued rotation of the screw and body member increases the height of the bead.

REFERENCES:
patent: 2375235 (1945-05-01), Maxwell
patent: 3670547 (1972-06-01), Granger
patent: 4759237 (1988-07-01), Fauchet et al.

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