Apparatus and methods for repairing tenons on turbine buckets

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

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Hauptverfasser: NOLAN JOHN F, ROBERTS DENNIS W, TOMKO ANDREW J, FISCHER TODD J, PARKER DAVID R, COOK CARTER S
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creator NOLAN JOHN F
ROBERTS DENNIS W
TOMKO ANDREW J
FISCHER TODD J
PARKER DAVID R
COOK CARTER S
description Bucket tip tenons requiring refurbishment are removed from the bucket tips by grinding. Groups of buckets are clamped on a rotatable table in positions adjacent an induction heating coil and a robotic welding arm, respectively. While one group is preheated, the other group of buckets is in a welding location, enabling the welding head 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.
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subjects 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
title Apparatus and methods for repairing tenons on turbine buckets
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