Chemical milling of the blades of a gas turbine engine

A method for chemical milling of a gas turbine engine blisk (10) having a hub (14) and a plurality of blades (18) made of metal for the purpose of changing the dimensional characteristics (i.e., chord (46) and/or thickness (50)) of one or more of these blades (18). At least one blade (18) of the bli...

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Bibliographische Detailangaben
Hauptverfasser:	BALLMAN, STEVEN MARK, YOUNG, KURT EDWARD, GUTKNECHT, JAMES EDWARD, STAMM, EDWARD IVAN, DAVIS, BRIAN MICHAEL
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL COMBINED OPERATIONS COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS DIFFUSION TREATMENT OF METALLIC MATERIAL ENGINE PLANTS IN GENERAL GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL LIGHTING MACHINE TOOLS MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES NON-POSITIVE DISPLACEMENT PUMPS OTHER WORKING OF METAL PERFORMING OPERATIONS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS STEAM ENGINES TRANSPORTING UNIVERSAL MACHINE TOOLS WEAPONS
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Beschreibung
Zusammenfassung:	A method for chemical milling of a gas turbine engine blisk (10) having a hub (14) and a plurality of blades (18) made of metal for the purpose of changing the dimensional characteristics (i.e., chord (46) and/or thickness (50)) of one or more of these blades (18). At least one blade (18) of the blisk (10) is treated with a chemical etchant of the metal that the blade (18) is made of for a period of time sufficient to change at least one of the chord (46) and thickness (50) of the blade(s) (18). In a preferred aspect of this method, at least one of the blades (18) of a rotationally imbalanced blisk (10) is treated with the chemical etchant for a period of time sufficient to change the chord (46) and/or thickness (50) of these blades (18) so that the blisk (10) is rotationally balanced.