Ultrasonic detecting method for bearing ring

Details Ultrasonic detecting method for bearing ring Ultrasonic detecting method for bearing ring

1999-05-27

2000-05-23

Moller, Richard A.

Measuring and testing

Vibration

By mechanical waves

73620, G01N 2900

Patent

active

060653434

ABSTRACT:
In an ultrasonic detecting method for a bearing ring in which a bearing ring 2 and an ultrasonic detection probe 3 are disposed within ultrasonic transmission medium such as water, then ultrasonic wave is transmitted from the ultrasonic detection probe 3 to the bearing ring 2, and a defect of the bearing ring 2 is detected on the basis of an ultrasonic wave echo reflected from the bearing ring 2, wherein at least a defect in a range from the surface of the bearing ring 2 to a position beneath by 2 mm from the surface of the bearing ring which is deeper than a maximum shearing stress position of the bearing ring 2 is detected by an angle beam method with an incident angle in a range of 10 to 30.degree., preferably in a range of 25 to 30.degree., and a defect in a range deeper than the range detected by the angle beam method is detected by a normal beam method with an incident angle in a range of 0 to 10.degree., preferably in a range of 0 to 5.degree., thereby to detect a defect in the entire section of the bearing ring 2.

REFERENCES:
patent: 5005417 (1991-04-01), Kawasaki et al.
patent: 5056368 (1991-10-01), Kawasaki et al.

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