Rohmann GmbH offers various solutions for the non-destructive testing of fasteners and fixings, with its digital in-line test instrument ELOTEST PL650 enabling the automated structure inspection of screws, bolts, nuts, rivets and punched parts.
Since being founded in 1977 Rohmann GmbH has experienced breathtaking development, with the company able to offer solutions for all aspects of non-destructive material testing by eddy current. Cables, probes, coils, rotors, eddy current test instruments, and systems, as well as software, are all developed, manufactured and sold from the company location in Frankenthal, Germany – with more than thirty representatives supporting the family-owned company worldwide.
Through the ELOTEST PL650, which features a High Distance Sensor (HDS) and FastSort software, also developed by Rohmann, more than 500 parts per minute can be inspected for defects in structure. The sensor is also designed so that, with the high penetration depth of up to 10mm, it is possible to penetrate a glass plate to carry out sorting checks. Therefore, the sensor can simply be mounted underneath a glass plate, on which the test parts are placed.
“Whether crack detection or material mix-up, the eddy current test instrument ELOTEST PL650 displays the test results of different testing stations, which in the past required several devices along the line,” explains Rohmann. “In doing so, it is convincing by its user friendliness and its unsurpassed signal purity.”
The ELOTEST PL650 has also been supplemented by a 19 inch version (PL650/R) and a compacter 9.5 inch (PL650/RC) remote version for integration into automated systems. The inspection system for small cylindrical rollers from Stalvoss GmbH & Co KG is a good example of how the ELOTEST PL650 can be used. In this case, the eddy current test instrument is provided with two channels, which make it possible to carry out crack detection and multifrequency sorting testing one after the other and in one inspection cycle. An EC15 rotor, with an adjustable RDE rotating head, carries out the inspection for cracks. Two coils, working on the principle of exterior comparison, are provided for the multifrequency sorting test and the FastSort software evaluates the recorded data. In addition to the eddy current component from Rohmann, a camera is used for the inspection of the lateral surface. The inspection system is provided with a total of three sorting gates. The good parts are moved on to the outlet and deposited as bulk material, while the rejects are discarded into separate containers.
Another solution from Rohmann is the small ELOTEST IS3 in-line instrument, which is a simple one channel solution that can be integrated in semi-automated systems for standardised sorting tasks or the inspection from cracks and grinding burns – with the corresponding accessories such as sensors or feed-through coils making it possible to achieve a high inspection speed.
Biog
Having spent a decade in the fastener industry experiencing every facet – from steel mills, fastener manufacturers, wholesalers, distributors, as well as machinery builders and plating + coating companies, Claire has developed an in-depth knowledge of all things fasteners.
Alongside visiting numerous companies, exhibitions and conferences around the world, Claire has also interviewed high profile figures – focusing on key topics impacting the sector and making sure readers stay up to date with the latest developments within the industry.
