Method and apparatus for bulge forming and bending tubes

Details Method and apparatus for bulge forming and bending tubes Method and apparatus for bulge forming and bending tubes

1996-11-20

1998-10-20

Jones, David

Metal deforming

By application of fluent medium, or energy field

With actuated tool engaging work

72150, 72152, 72370, 294211, B21D 905, B21D 3920

Patent

active

058230319

ABSTRACT:
There is provided a device and manner for bulge forming and bending a tube or hollow extrusion, such as a pipe or conduit. The one portion of the length of the tube is bulge-formed to define a radially expanded, contoured section of the tube, while another portion of the tube length is bent to define an angle or curve in the tube. The device employs a radially expandable mandrel which serves both as the expandable member for bulge-forming the tube, as well as a bending mandrel to stabilize the tube against wrinkling or collapse during bending.

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patent: 5097689 (1992-03-01), Pietrobon
patent: 5392626 (1995-02-01), Blezard et al.

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