Method and apparatus for bending coated pipe including heating t

Details Method and apparatus for bending coated pipe including heating t Method and apparatus for bending coated pipe including heating t

1978-03-15

1979-01-02

Larson, Lowell A.

Metal deforming

With temperature modification of tool or of specified...

Cooling

72369, 72DIG12, B21D 716

Patent

active

041321049

ABSTRACT:
Method and apparatus for bending coated pipe including heating a specific area of the pipe coating by resistance heating to prevent damage at all areas of the pipe coating during bending of the pipe. The pipe bending equipment includes an upper bending die, and a lower pin up shoe and a lower strongback. The strongback has resistance heating means in a recess which is positioned over a specific area of the upper surface of the strongback, for heating the pipe coating prior to bending of the pipe. By heating of a relatively small specific area of the pipe coating, damage to the entire area of the coating is avoided.

REFERENCES:
patent: 2007775 (1935-07-01), Smith
patent: 2893459 (1959-07-01), Kosek
patent: 3105537 (1963-10-01), Foster
patent: 3251974 (1966-05-01), Seyfried

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