Method and an apparatus for inspecting articles

Details Method and an apparatus for inspecting articles Method and an apparatus for inspecting articles

1999-03-12

2000-11-28

Mai, Huy

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

25055946, 416 96R, 416 97R, G01N 2188

Patent

active

061538892

ABSTRACT:
An apparatus (42) for inspecting an as cast turbine blade (40), with impingement cooling passages (36) (see FIG. 2 ), comprises a vacuum pump (52) arranged to evacuate the interior of the turbine blade (40) through pipe (48) and valve (54) and a supply of steam (46) arranged to supply steam to the interior of the turbine blade (40) through the pipe (48) and a valve (50). An infrared camera (56) is arranged to view the outer surface (32) of the turbine blade (40) to detect hot spots produced on the outer surface (32) of the turbine blade (40) by jets of steam impinging on the inner surface (35) of the turbine blade (40) from the cooling passages (36). A processor (60) records the images produced by the camera (56) and analyses the images to determine if the cooling passages (36) have been formed and if they have been formed in the correct position.

REFERENCES:
patent: 3566669 (1971-03-01), Lawrence
patent: 3700903 (1972-10-01), Adler et al.
patent: 5111046 (1992-05-01), Bantel
patent: 5246340 (1993-09-01), Winstanley et al.
patent: 5625196 (1997-04-01), Williams

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