Beam blocking material and method for beam drilling and inspecti

Details Beam blocking material and method for beam drilling and inspecti Beam blocking material and method for beam drilling and inspecti

1997-09-09

1998-06-30

Mills, Gregory L.

Electric heating

Metal heating

By arc

21912183, B23K 2600

Patent

active

057737908

ABSTRACT:
A method of forming and inspecting beam drilled holes, and in particular laser beam drilled holes, in an article, such as a turbine blade or vane airfoil, with a hollow interior. The method includes (a) filling the hollow interior with a beam blocking material having fluorescent material, (b) beam drilling the holes in the wall through to the hollow interior, and (c) inspecting the hole under an ultraviolet light. The beam blocking material preferably includes a wax material and step (a) includes filling the hollow interior 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 investment casting molds and the fluorescent material may be a fluorescent penetrant.

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