METHOD FOR ULTRASONIC TESTING OF THE RAIL HEAD Russian patent published in 2022 - IPC G01N29/04 

FIELD: ultrasonic testing.

SUBSTANCE: invention is intended for ultrasonic testing of the rail head. The substance of the invention lies in the fact that a block of piezoelectric transducers is installed on the rolling surface of the rail head symmetrically to its longitudinal axis and moved along the longitudinal axis of the rail, while using one pair of inclined piezoelectric transducers deployed perpendicular to the longitudinal axis of the rail, directed towards the side, respectively, working and non-working edges of the rail head, emit and receive ultrasonic vibrations in the specified time zones: the zones of the radial transition of the side and bottom, respectively, from the working and non-working faces of the rail head, as well as re-reflected signals from the radius transition of the side and top, respectively, from the working and non-working edges of the rail head; to determine the presence of a defect, a block of piezoelectric transducers receives multiple re-reflected signals located in the time zone between the radius transitions of the side and bottom, respectively, from the working and non-working faces of the rail head and the radial transitions of the side and top, respectively, from the working and non-working faces of the rail head; to measure the displacement of the acoustic unit of the piezoelectric transducers relative to the longitudinal axis of symmetry of the rail, the time difference of the signals received by each of the inclined piezoelectric transducers separately, directed towards the working and non-working faces of the rail head from the zones of radial transitions of the lateral and lower, also lateral and upper, respectively, is determined from the working and non-working faces of the rail head; to measure the lateral wear of the rail, the time of received signals by inclined piezoelectric transducers from the radial transition zones of the lateral and upper, respectively, from the working and non-working faces of the rail head is determined and compared with the time from the radial transition zones of the lateral and upper faces of the head in the new rail; to measure the vertical wear of the rail, the time of received signals from the radial transition zones of the side and bottom, respectively, from the working and non-working edges of the rail head is determined and compared with the time from the radial transition zones of the side and top faces of the head in the new rail.

EFFECT: increasing the reliability of ultrasonic flaw detection of the rail head.

1 cl, 20 dwg