FIELD: non-destructive quality control. SUBSTANCE: ultrasonic vibrations are excited in female part by means of registered converter, which has acoustic axis to be directed at the direction of crossing with axis of the hole for fitting. Signals are registered after being reflected from the first contact boundary and then from the second one, after wave entered the fitting element, and amplitude difference of the signals is measured. EFFECT: improved accuracy of checking of bolted and riveted joints. 3 dwg
