Screw surface flaw inspection method and an apparatus therefor

Details Screw surface flaw inspection method and an apparatus therefor Screw surface flaw inspection method and an apparatus therefor

1983-02-24

1986-07-08

Willis, Davis L.

Optics: measuring and testing

Inspection of flaws or impurities

Having predetermined light transmission regions

356376, G01N 2132

Patent

active

045989982

ABSTRACT:
A screw surface flaw inspection method and an apparatus therefor, which projects light onto the surface of a screw, the light being scanned axially of the screw, and a detector which picks up the reflected light from the projected surface and sends an output signal to a signal processing circuit to thereby detect the flaw on a basis of time base variation of the intensity of reflected light. The method and apparatus enables the inspection of minute flaws rapidly and exactly.

REFERENCES:
patent: 2349989 (1944-05-01), Reason
patent: 3816746 (1974-06-01), Gugliotta et al.
patent: 4315688 (1982-02-01), Pryor

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