TURBINE ROTOR AND METHOD FOR MANUFACTURING THE SAME

• Main Authors: ARAI TAKASHI, HATANO KIMIO
• Format: Patent
• Language: English
• Published: 09.06.2011
• Subjects: BLASTING; CLADDING OR PLATING BY SOLDERING OR WELDING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MACHINE TOOLS; MECHANICAL ENGINEERING; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WEAPONS; WELDING; WORKING BY LASER BEAM

PROBLEM TO BE SOLVED: To provide a turbine rotor and a method for manufacturing the same capable of electron beam welding between a shaft and a turbine wheel by using one electron beam device, and capable of reducing the welding distortion of a shaft which occurs in the conventional electron beam welding. SOLUTION: In the method for manufacturing the turbine rotor in which the turbine wheel and the shaft formed in a rod shape are joined by the electron beam welding, a joint part of the shaft with the turbine wheel includes at least a plane part and a groove part sequentially from the center side of the shaft, a face contact part is formed by bringing the plane part of the shaft into face-to-face contact with the plane of a joint part of the turbine wheel with the shaft, and the electron beam welding is performed from the outer peripheral side of the turbine wheel and the shaft to a depth where the groove part exists to form a welding part to the groove part in a circumferential direction. COPYRIGHT: (C)2011,JPO&INPIT