ROHMANN Eddy Current Test Equipment and Systems
Since 1977 we have been developing, producing and distributing eddy current testing devices and systems, which are now used worldwide in crack, heat treatment, material confusion and grinding burn testing. Testing solutions for every requirement and every demand. Made in Germany.
A specialized machine, ready-made, yet adjustable to your needs. flexitest makes it possible for you to carry out the quality control of individual parts and small series quickly, in a transparent and reproducible manner. In combination with any additional handling, flexitest can be extended to be a fully automatic series testing system.
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Flexible and precise 3-axis Eddy Current inspection system for the detection of cracks and grinding burn, yet adjustable to your needs. System n-dect, Test Instrument Rohmann GmbH
ELOTEST PL650 RC in an air-conditioned control cabinet, display and operation via a 21“ touch display. Hard- and software for the operation and the support are integrated by means of a remote access
3D axis movement – The kinematics of the probe make a pivoting angle of 145° possible, simultaneously interpolating with regard to the feed and advance motion, all component shapes can be captured through flexible G-code programming
Compact and modular system – The automated testing process starts after the test object has been inserted and the test object is clamped into a precision chuck and set into a highly accurate rotation
Precision chuck for clamping the test object – clamp the test object either manually or automatically as desired, to increase your process reliability and to offer yourself the possibility to test fully automatically, with integration in robotic cells
New rapid changeover – the testing probe can be replaced in no time at all, the comprehensive system and sensor monitoring system ensures the highest test reliability
Eddy current testing can be used to check objects made of electrically conductive materials for integrity, composition and tempering condition or also for geometric dimensions. Eddy current testing is based on the physics of electromagnetic fields.
A current-carrying electrical conductor is surrounded by a circular magnetic field (vortex field). If the straight conductor wire is now wound into a circular conductor loop, the vortex-like field lines overlap in such a way that they form a magnetic dipole (with a north/south pole structure).
In principle, eddy current testing can be classified as a surface testing method. Depending on the method, the induced eddy currents are concentrated on a more or less thin layer close to the surface. The strongest eddy currents flow directly at the surface. Therefore, the maximum test sensitivity can be achieved there.
The art of probes development consists in the realisation of a sensor construction that brings the required magnetic field (and thus the eddy current field) to the ‚test location‘ in the workpiece with the required test frequency, in the optimum alignment and required strength, while always minimising undesirable effects as far as possible.
Basically, there are two main groups of probes: flow sensors and tactile probes. In the case of through-flow probes, a distinction is made between: External pass-through sensor, which encloses the test object and is guided through it (e.g. rod testing with comprehensive test coils) and internal pass-through sensor, which is enclosed by the test object, i.e. the sensor is guided through the test object (e.g. in internal pipe testing). Pass-through sensors always detect a complete circumferential section of the test object, outside or inside.
When selecting the test frequency for eddy current testing, consider the specific requirements of the application and the sensor to be used. The recommended frequency range for the sensor should be taken from the manufacturer’s sensor data sheet.
Rohmann GmbH has continuously developed the ELO\WHEEL inspection system for the MRO sector.
