Back-up pad for welding

Details Back-up pad for welding Back-up pad for welding

1978-04-03

1979-08-28

Lanham, C. W.

Metal fusion bonding

Seam backup means

B23K 522

Patent

active

041658310

ABSTRACT:
An improved back-up pad apparatus for use in externally welding abutting ends of pipe is formed of hard anodized aluminum material and comprises a plurality of arcuate back-up pads for interior positioning to face the weld. Each arcuate pad is mounted on a shoe for biased engagement with the interior cylindrical surfaces of the pipes. Intermediate shoes carrying cylindrically surfaced members are provided at the rounded ends of adjacent back-up pads.

REFERENCES:
patent: 2878770 (1959-03-01), Work
patent: 3110277 (1963-11-01), Dixon
patent: 3458105 (1969-07-01), Valentine
patent: 3561320 (1971-02-01), Nelson
patent: 3741457 (1973-06-01), Gwin

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