T-joint welding fixture

Details T-joint welding fixture T-joint welding fixture

B - Operations, Transporting

23

K

B23K 9/16 (2006.01) B23K 9/028 (2006.01)

Patent

CA 2120574

Abstract of the Disclosure 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.

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