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NDT.net Issue - 2016-10 - NEWS
NDT.net Issue: 2016-10
Publication: e-Journal of Nondestructive Testing (NDT) ISSN 1435-4934 (NDT.net Journal)

New ISONIC EXPERT SHAFT technology application for the PA inspection

Sonotron NDT76, Rehovot, Israel

Sonotron NDT announces the new release of the ISONIC EXPERT SHAFT technology application for the PA inspection of the solid and hollow shafts, bolts, spindles, etc demonstrating the ability of detection of the transversal cracks distanced at few millimeters to several meters from the side end surface of the part.

ISONIC EXPERT SHAFT Inspection SW package for ultrasonic Phased Array (PA) flaw detectors of ISONIC series (ISONIC 2009, ISONIC 2010, ISONIC 3510) relates to the inspection of the shafts, bolts, spindles, etc. It was introduced 6 years ago for the first time and has been improved significantly over the years. The inspection is performed through the sectorial scan compression wave insonification of the material by means of PA probe situated at the accessible side end surface of the part.

The outer shape of the simple and medium complicity geometry parts may be entered right in the instrument or in the PC through the simple dialogue. For the complex shape geometry parts the templates of their outer shapes may be imported from the CAD drawings.

Whilst implementing the desired sequence of pulsing receiving cycles (Scan Plan) each focal low is characterized by the individually settled focal point “travelling” along the outer surface of the part, and the corresponding time base; the sensitivity is equalized within entire insonified section of the material through use of the independent mechanisms of Angle Gain Compensation (AGC) and DAC/TCG acting simultaneously thanks to the unique ability of ISONIC Series PA instruments: the DAC / TCG mechanism is used purely for compensating the dependency of echo amplitude on the material travel distance while the feature of varying Gain per Focal Law voluntarily is utilized just for the forming of easy-reproducible AGC plan. Both the DAC / TCG and AGC plans are created independently on each other with use of the same set of reference reflectors. The sharp focusing is provided through utilizing the full aperture for the firing and receiving of the signals (depending on the PA probe and adaptor used - up to 128:128).

At last the whole volume of the material is inspected in one revolution of the part itself or of the PA probe moving around the end surface. The homogeneous sensitivity and true-to-geometry cross-sectional coverage and imaging are provided so for every radial position of the PA probe along with 100% raw data capturing and “on-the-fly” of the unfolded C-Scan imaging. On completing the scanning revolution the 3D image of the part and automatically created editable defect list are available immediately. True-to-geometry imaging allows easy distinguishing between the defects indications and geometry echoes.

For the complex geometry large shafts the various scan plans for several regions of interest may be created separately and implemented simultaneously then through the use of MULTGROUP mode

ISONIC EXPERT SHAFT PAUT inspection technology is suitable for the inspection of the railway wheel set, wind turbine, ship propeller, and many other types of the simple and complex geometry shafts, bridge hanger pins, drill rods, bolts, spindles, and the like. The detectability of the transversal cracks corresponding to the lower reject limit and larger has been confirmed and reported by the users for the defects distanced at the distances from few millimeters to several meters from the probe.

ISONIC EXPERT SHAFT PAUT inspection is fully compatible with the recently introduced VAUT (Video Aided UT) technology.

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