METHOD FOR MANUFACTURING IMPELLER

An object is to provide an impeller welding method capable of avoiding a decrease in temperature when a worker joins components by welding to make an impeller and also reducing work load. The present invention relates to a method of joining a hub 11 and a shroud 12, either one of which has blades 13...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	PHAM, KHANHSON, NAKAJIMA, HIROSHI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CLADDING OR PLATING BY SOLDERING OR WELDING CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING HEATING LIGHTING MACHINE TOOLS MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR NON-POSITIVE DISPLACEMENT PUMPS PERFORMING OPERATIONS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS SOLDERING OR UNSOLDERING TRANSPORTING WEAPONS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	An object is to provide an impeller welding method capable of avoiding a decrease in temperature when a worker joins components by welding to make an impeller and also reducing work load. The present invention relates to a method of joining a hub 11 and a shroud 12, either one of which has blades 13 integrally formed thereon, by welding. During the welding, in an upright state in which the hub 11 is placed to face a mount surface, the hub 11 and the shroud 12 are placed on top of each other to form an assembled body 10. Welding is performed on the assembled body 10 being covered with a heat insulating jacket 30 (a to g). The heat insulating jacket 30 covers the assembled body 10 except an open region (OP) and an inflow port 14 IN that are required for welding. When welding of one open region OP is completed, a new open region OP is formed by moving the heat insulating jacket 30 with respect to the assembled body, and then the next welding is performed.