DIRECTIONAL TRANSDUCER FOR ULTRASONIC CHECK-UP OF CYLINDRICAL PARTS Russian patent published in 1994 - IPC

FIELD: ultrasonic check-up of cylindrical parts. SUBSTANCE: transducer has plastic prism and protector with cylindrical notch on working surface; prism mounts piezoid with acoustical axis in longitudinal plane of symmetry of slot. Piezoid is spaced 6 to 10 mm from working surface of prism along acoustical axis of piezoid; protector thickness h, notch depth t, and piezoid diameter d are selected from condition that h = (1-4) mm; 0,2 mm ≅ t < 1 mm, d > 5 mm, which provides for checking transducer prism angle in case of wear of notch surface by means of standard specimen and to increase service life of transducer by reducing protector thickness by new depth of notch. EFFECT: improved service life of transducer. 2 dwg