Beam blocking material and method for beam drilling and inspecting cooling holes

A method of forming and inspecting beam drilled holes (12), and in particular laser beam drilled holes (12), in an article such as a turbine blade (10) or vane airfoil (11), with a hollow interior (16). The method includes (a) filling the hollow interior (16) with a beam blocking material (24) havin...

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Bibliographische Detailangaben
Hauptverfasser:	MOORE, JAMES RICHARD, WHEAT, GARY EUGENE
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CLADDING OR PLATING BY SOLDERING OR WELDING COMBINED OPERATIONS CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING ENGINE PLANTS IN GENERAL HEATING INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES LIGHTING MACHINE TOOLS MACHINES OR ENGINES IN GENERAL MEASURING MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES OTHER WORKING OF METAL PERFORMING OPERATIONS PHYSICS SOLDERING OR UNSOLDERING STEAM ENGINES TESTING TRANSPORTING UNIVERSAL MACHINE TOOLS WEAPONS WELDING WORKING BY LASER BEAM
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Beschreibung
Zusammenfassung:	A method of forming and inspecting beam drilled holes (12), and in particular laser beam drilled holes (12), in an article such as a turbine blade (10) or vane airfoil (11), with a hollow interior (16). The method includes (a) filling the hollow interior (16) with a beam blocking material (24) having fluorescent material, (b) beam drilling the holes (12) in a wall (15) through to the hollow interior (16), and (c) inspecting the hole (12) under a black light (30). The beam blocking material (24) preferably includes a wax material and step (a) includes filling the hollow interior (16) with a melted mixture of the wax and fluorescent materials. The wax material may be a pattern wax material suitable for use in making turbine blade (10) investment casting molds and the fluorescent material may be a fluorescent penetrant.