Cylindrical alignment bar for ultrasonic testing of small diameter cylindrical parts

摘要

The utility model refers to devices for non-destructive testing of the structure and defects of metal products and can be used in the manufacture of samples for adjusting the sensitivity of ultrasonic flaw detectors during ultrasonic testing (UST) of cylindrical parts (rods, castings, forgings) with a diameter of no more than 40 mm.;The tuning sample is made with standard cylindrical reflectors with a diameter of 0.8 ... 1.2 mm: for adjusting the sensitivity of profiled piezoelectric transducers in the longitudinal direction (along the circumference of the cylinder) - in the form of 3-end blind horizontal cylindrical holes with a length of (0.5 ... 0.7 ) D located in the vertical plane of symmetry of the sample parallel to the generatrix of the cylinder with a step along the height of the sample D / 3; for adjusting the sensitivity in the transverse direction (along the generatrix of the cylinder) - in the form of 3-chord through horizontal cylindrical holes located perpendicular to the longitudinal axis of symmetry of the cylindrical surface of the sample with a step D / 3 along the height of the sample and a step of 0.2D along the length of the sample. The diameter of the horizontal cylindrical holes used to adjust the sensitivity, equal to 0.8 ... 1.2 mm, corresponds to the minimum possible acoustic signal from horizontal cylindrical holes for its recognition above the intrinsic noise level for the thickness range of the tested metal 0 ... 40 mm, and its effective area the reflective surface is 2.2 mm ² . 1 wp f-ly; 4 ill.