Measuring and testing – Vibration – By mechanical waves
Patent
1981-04-14
1982-12-07
Kreitman, Stephen A.
Measuring and testing
Vibration
By mechanical waves
73641, G01N 2904
Patent
active
043620590
ABSTRACT:
An ultrasonic testing method permits investigating the nodal point in the profile of a cast wheel of a motor vehicle between clinch and wheel flange. Hollow spaces occurring in this area may be tolerated when the remaining wall thicknesses between the profile legs do not drop below a certain thickness. In order to be able to check a wheel in one single measuring process and with a simple measuring geometry, two of the three intermediate leg parts are tested by direct testing by an evaluation of the echo height in consequence of lateral contraction of ultrasonic energy or in consequence of partial reflection which allows one to make conclusions with regard to the cross section and sound spots of the material through which ultrasound was sent, while the remaining part is measured by means of a simple travel time transversely to the residual wall. An apparatus for performing this method is disclosed.
REFERENCES:
patent: 3442119 (1969-05-01), Cowan
patent: 3683680 (1972-08-01), Johnson et al.
patent: 3768306 (1973-10-01), Stearns
patent: 3924454 (1975-12-01), McElroy et al.
patent: 4165648 (1979-08-01), Pagano
Georg Fischer Aktiengesellschaft
Kreitman Stephen A.
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