Apparatus and method for repairing tenons on turbine buckets

Bucket tip tenons requiring refurbishment are removed from the bucket tips by grinding. Groups of buckets are clamped (22) on a rotatable table in positions adjacent an induction heating coil (16) and a robotic welding arm (42), respectively. While one group is preheated, the other group of buckets...

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Bibliographische Detailangaben
Hauptverfasser:	NOLAN, JOHN FRANCIS, ROBERTS, DENNIS WILLIAM, TOMKO, ANDREW JOHN, FISCHER, TODD JOSEPH, PARKER, DAVID ROY, COOK, CARTER STEVEN
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING CLADDING OR PLATING BY SOLDERING OR WELDING COMBINED OPERATIONS COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ENGINE PLANTS IN GENERAL GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MACHINE TOOLS MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES OTHER WORKING OF METAL PERFORMING OPERATIONS SOLDERING OR UNSOLDERING STEAM ENGINES TRANSPORTING UNIVERSAL MACHINE TOOLS WEAPONS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	Bucket tip tenons requiring refurbishment are removed from the bucket tips by grinding. Groups of buckets are clamped (22) on a rotatable table in positions adjacent an induction heating coil (16) and a robotic welding arm (42), respectively. While one group is preheated, the other group of buckets is in a welding location, enabling the welding head (20) on the robotic arm to sequentially apply weld buildup material to the bucket tips. After applying weld buildup material in multiple passes and sequentially to the bucket tips, the buckets are removed, stress-relieved and the weld buildup material machined to provide refurbished tenons. Upon removal of the buckets from the table, the table is rotated to locate the preheated buckets in welding locations and additional buckets are clamped to the table for preheating.