FIELD: non-destructive monitoring of welded assemblies.
SUBSTANCE: ultrasonic waves are generated at surface of thin metal sheet welded to substrate. Speed of propagation of surface waves is correlated with impact strength of welded assembly. Device has head for irradiating waves oriented to components at specific angle of inclination and head for receiving part of waves either reflected from component o or sending back that part of waves to radiating head in form of echo-signal. Second head is oriented at angle of inclination being opposite to angle of inclination of radiating head. Second head has two active surfaces disposed in steps and at like distance from component.
EFFECT: non-destructive monitoring; non-direct estimation of impact strength.
10 cl, 5 dwg
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