Tomographic 2.1, RD 07.09-97

Application "Tomographic 2.1" implements the combined ultrasonic testing of wheel sets of cargo and passenger vehicles in accordance with requirements of RD 07.09-97 "Guideline on combined ultrasonic testing of railway vehicle wheel sets" as modified by amendments nos. 1,2,3.

Ultrasonic testing of wrought wheels is performed using scanner USK-4ТМ and ensures control of required zones for single revolution with possibility of tomographic imaging and determination of coordinates of defective area.

If required, scanner USK -4TM is equipped with eddy-current probe to reveal manufacturer’s marks in order to prevent the over reject of wheels (false flaw responses in the marking area). Due to built-in multi-channel system, ultrasonic and eddy-current probes operate simultaneously.

Concept of the "Tomographic 2.1" application is oriented toward maximal deemphasizing of human factor by means of implementation of following modes:

• acoustic contact tracing;
• full PEP monitoring;
• automatic tuning out of structural noises;
• visualization of flaws, including equivalent area, location depth and spatial orientation.

Tested zones of axles of wheel sets and wrought wheels:

Tested zone	Type of used PEP
Wheel set axles
Ultrasonic wave penetrability	P111-2.5-К12 or P131-2.5-0°/18° (0°)
Middle and far parts of wheel seat, except area under outer edge of hub	P111-2.5-К12 or P131-2.5-0°/18° (0°)
Near journal and part ahead of wheel seat (rings are put on)	P111-2.5-К12 or P131-2.5-0°/18° (0°)
Near part of wheel seat under outer edge of hub (rings are put on)	P121-2.5-18° or P131-2.5-0°/18° (18°)
Near journal and part ahead of wheel seat (rings are removed)	P111-2.5-К12 or P131-2.5-0°/18° (0°)
Near part of wheel seat under outer edge of hub (rings are removed)	P121-2.5-50°
Middle and far parts of wheel seat, except area under outer edge of hub (confirmation)	P111-2.5-К12 or P131-2.5-0°/18° (0°)
Near journal and part ahead of wheel seat (rings are put on) (confirmation)	P111-5.0-К6
Wrought wheels
Wheel flange	P121-2.5-50°-003 as a component of USK-4ТМ
Main section of rim	P121-2.5-40°-003 as a component of USK-4ТМ
Disc area adjacent to rim	P121-2.5-40°-003 as a component of USK-4ТМ
Tread	P121-0.4-90°

Special software “Railway NDT operator AWS” supplied with Tomographic UD4-ТМ flaw detector allows documentation of test results, their storing in electronic databases and preparation of the wheel set certificate. Also, at delivery, training demo clips on operation with specialized applications are built-in in the instrument and facilitates significantly familiarization with instrument.
 

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