T-joint welding fixture

Details T-joint welding fixture T-joint welding fixture

1993-04-26

1994-05-10

Shaw, Clifford C.

Electric heating

Metal heating

Of cylinders

219 60R, 21912511, B23K 912

Patent

active

053109821

ABSTRACT:
A method and apparatus for welding a branch tube to a header tube includes a fixture having a pair of clamps for supporting the fixture on the header tube. A welding head on the fixture includes a clamp to hold the branch tube in place relative to the header tube. The welding head also includes a collet extending into contact with the header tube. The header tube, the collet and the welding head form a limited volume chamber that contains shielding gas in the vicinity of the joint between the branch tube and the header tube. The welding head includes a mechanism for rotating a tungsten welding electrode around the intersection of the branch tube and the header tube to form the welded joint.

REFERENCES:
patent: 4243868 (1981-01-01), Graham
patent: 4357515 (1982-11-01), Kiefer et al.
patent: 4554429 (1985-11-01), Kazlauskas
patent: 4629853 (1986-12-01), Yttergren et al.
patent: 5220144 (1993-06-01), Jusionis

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