Method for welding an impeller

Details Method for welding an impeller Method for welding an impeller

1981-03-27

1982-06-01

Goldberg, Elliot A.

Electric heating

Metal heating

By arc

219107, 219137R, 219159, B23K 900

Patent

active

043330010

ABSTRACT:
A method and an apparatus for welding an impeller by using TIG process are provided in which one of the blades to be welded to a side plate or shroud plate is disposed so as to form a V-channel with the plate, the V-channel being oriented to face upwardly, and a torch head supported at the tip of a torch rod is placed above a weld line produced by the intersection of the blade and the plate so as to contact the inner surface of the V-channel keeping a proper distance between the tip of the tungsten electrode encased within the torch head and the weld line on which a filler wire of suitable length is disposed. The opposite end of the torch rod is mounted on a translating mechanism through a universal joint so as to move the torch head along and above the weld line and electric current is supplied between the weld line on which the filler wire is disposed and the electrode while simultaneously supplying an inert gas through the nozzle during the movement of the nozzle, the nozzle keeping in contact with the inner surface of the V-channel due to gravity.

REFERENCES:
patent: 3104313 (1963-09-01), Rieppel
patent: 3140385 (1964-07-01), Johnston
patent: 3639724 (1972-02-01), Gerath

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