Measuring and testing – Vibration – By mechanical waves
Patent
1999-06-04
2000-12-19
Moller, Richard A.
Measuring and testing
Vibration
By mechanical waves
73644, G01N 2900
Patent
active
06161436&
ABSTRACT:
A shoe for ultrasonically inspecting an area beneath the fillets of a crankshaft and the area adjacent each side of the fillets for flaws in the highly stressed fillet area, the shoe comprising a planar surface and a cylindrical surface disposed at a right angle thereto with a toroidal surface forming an smooth transition therebetween and mating with surfaces on the crankshaft, the shoe houses three transducer oriented toward the centerline of the cylindrical surface and disposed to generally form angles of 22.5.degree., 45.degree. and 67.5.degree. with the centerline of the cylindrical surface, the transducer oriented at 45.degree. is generally one half the radius of the fillet so it does not produce any surface waves, the other two transducers are generally twice as large and oriented so the surface waves produced do not converge under the central transducer, whereby the ultrasonic inspection can detect small inclusions and defects with adequate signal to noise ratio and near surface resolution covering the entire fillet and a portion of the journal surface of the crankshaft adjacent to the fillet.
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Baehr Fred J.
Caterpillar Inc.
Moller Richard A.
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