Fluorescent inspection of airfoil cooling holes

Details Fluorescent inspection of airfoil cooling holes Fluorescent inspection of airfoil cooling holes

2006-08-22

2006-08-22

Pham, Hoa Q. (Department: 2877)

Optics: measuring and testing

Inspection of flaws or impurities

Having predetermined light transmission regions

C219S121710, C219S121830

Reexamination Certificate

active

07095495

ABSTRACT:
A system and method are provided for inspecting cooling holes of a completed, lasered, and deburred turbine airfoil. The cooling holes are covered with a very porous tape before placing the turbine airfoil into an air fixture that has a metered amount of fluorescent liquid dripped into the airline. The atomized fluorescent liquid flows through the turbine airfoil internal cavities, exiting through the open cooling holes, where it is absorbed by the porous tape. A pattern will appear on the tape surface, in the area of the open holes, indicative of the presence of not-through or plugged cooling holes.

REFERENCES:
patent: 5773790 (1998-06-01), Moore et al.
patent: 2003/0037436 (2003-02-01), Ducotey et al.
patent: 0359660 (1990-03-01), None
patent: 2164746 (1986-03-01), None

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