Automatic pipe welding apparatus and method

Details Automatic pipe welding apparatus and method Automatic pipe welding apparatus and method

1978-03-17

1980-08-12

Husar, Francis S.

Metal fusion bonding

Process

With clamping or holding

228 50, 228216, 228169, B23K 3704

Patent

active

042168961

ABSTRACT:
An expandable band is employed to provide a mold on the interior of the joint into which the weld puddle is flowed which may be made of any appropriate material, but preferably is copper. The back-up band is carried on a set of rounding jacks which engage the facing pipe ends and exert a circumferentially uniform radial force on the pipes. This serves to round the ends equally and bring them into coaxial alignment with each other in the vicinity of the joint. The back-up band bridges the joint and expands to form a closed or semi-sealed chamber around the joint.

REFERENCES:
patent: 2350718 (1944-06-01), Bissout et al.
patent: 2819517 (1958-01-01), Pursell
patent: 3110277 (1963-11-01), Dixon et al.
patent: 3149597 (1964-09-01), Brasfield et al.
patent: 3937382 (1976-02-01), Cunningham et al.

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