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.

Abstract: A method and an apparatus for welding an impeller by using a 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-shaped channel with the plate, the 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 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.