Method and apparatus for bending large pipes

Details Method and apparatus for bending large pipes Method and apparatus for bending large pipes

1976-12-07

1979-12-11

Combs, E. M.

Metal deforming

By deflecting successively-presented portions of work during...

With modification or control of temperature or work, tool or...

72369, B21D 7024, B21D 716

Patent

active

041776615

ABSTRACT:
A process for bending large pipes comprises the steps of progressively and inductively heating the wall of a pipe within the region to be bent. The penetration depth of the heat energy is varied over the circumference of the pipe through shielding. The inner radius of the pipe to be heated may initially be heated before the entire wall is differentially heated. Apparatus for carrying out the process is also disclosed.

REFERENCES:
patent: 1891338 (1932-12-01), Snell
patent: 1996838 (1935-04-01), Snell
patent: 2461323 (1949-02-01), Hille
patent: 2480315 (1949-08-01), Bennett
patent: 3740991 (1973-06-01), Walraven et al.

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