Ultrasonic testing method for balls

Details Ultrasonic testing method for balls Ultrasonic testing method for balls

1994-06-09

1995-03-21

Wieder, Kenneth A.

Measuring and testing

Vibration

By mechanical waves

73629, G01M 1304

Patent

active

053985516

ABSTRACT:
An ultrasonic testing method for detection of flaws in a ball-shaped material to be tested using an ultrasonic probe, wherein a test frequency f (MHz) of the probe and a radius of curvature r (mm) of a tip portion of the probe satisfy the relationship 50 mm.ltoreq.r.sqroot.f.ltoreq.60 mm, and wherein the radius of curvature r (mm) of the tip portion and the diameter D (mm) of an oscillator of the probe satisfy the relationship 0.35 mm.ltoreq.D/r.ltoreq.0.50 mm. The method enables detection of surface and internal flaws in materials, particularly ceramic ball hearings having a diameter ranging from several tens of millimeters down to 10 mm or below.

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patent: 4287770 (1981-09-01), Weyns
patent: 4387596 (1983-06-01), Fenkner et al.
patent: 4969361 (1990-11-01), Kawasaki et al.
patent: 5005417 (1991-04-01), Kawasaki et al.
The Way Things Work, pp. 138-139 .COPYRGT.1967.

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