Method of bending a thick metal tube, and apparatus for implemen

Details Method of bending a thick metal tube, and apparatus for implemen Method of bending a thick metal tube, and apparatus for implemen

1986-04-02

1987-08-18

Combs, E. Michael

Metal deforming

With use of control means energized in response to activator...

Metal deforming by use of roller or roller-like tool element

72128, 72369, B21D 712, B21D 716

Patent

active

046868445

ABSTRACT:
A method and apparatus for bending thick metal tubes is disclosed and is characterized in that thermal insulation is disposed inside the heated zone of the tube being bent, and that the thickness of said thermal insulation is great enough to considerably reduce the temperature gradient between the inside and outside surfaces of the tube in said heated zone.

REFERENCES:
patent: 1996838 (1935-04-01), Snell
patent: 3896649 (1975-07-01), Stuart
patent: 4151732 (1979-05-01), Hofstede et al.
patent: 4177661 (1979-12-01), Schwarzbach et al.
patent: 4414833 (1983-11-01), Nicolas et al.

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