PRODUCT REVIEWS
New MIG / MAG process and automated welding control
With EWM React , the welding technology manufacturer from Mündersbach is launching a new welding process into the market . Using active wire movement , EWM ’ s MIG / MAG welding process provides control during automated welding .
“ With this process , we have maximised process stability . Users achieve up to 100 % faster welding speeds and significantly higher quality results , compared to conventional short arc processes ,” it told ISMR .
EWM has developed a robot torch with a highly dynamic motor specifically for EWM React . It pushes the wire towards the workpiece at a rapid rate and actively pulls it back again .
“ When you combine a short arc process with digital welding process control and add a highly dynamic torch drive , the result is EWM React . This solution consists of a Titan XQ R power source with an integrated RCC module and the new React control unit ,” it added .
‘ React ’ stands for ‘ Reversing actively controlled transfer .’ This describes a process in which the welding droplet passes into the weld pool in a controlled manner , due to both the control of the welding voltage and welding current , as well as the forwards and backwards movement of the wire .
EWM React offers control and process reliability for automated MIG / MAG welding .
To accomplish this , the wire is first moved towards the weld pool at high speed while the arc torches onto the weld pool and creates a molten droplet . As soon as the wire contacts the molten metal , the droplet passes into the weld pool through a short circuit . The wire is then pulled out of the weld pool by an active and dynamically controlled retraction and the arc is reignited at very low power .
“ The combination of the quick current reduction offered by the RCC module and the controlled mechanical wire movement allows spatter-free results with unbeatable process stability ,” outlined EWM .
“ The active wire movement in the highfrequency range is generated using a new EWM robot torch with a highly dynamic motor . This breaks through the usual physical limits of the short arc ; the droplet transition is completely controlled . Thanks to the enormous process stability , welding speeds twice as high as with a classic short arc can be achieved , while the heat input can be reduced by up to 35 %. This reduces distortion to a minimum . We therefore offer an efficient process for high-quality welding results in the application areas of cladding , joint welding and wire arc additive manufacturing ( WAAM ),” it added .
“ With EWM React , we offer superior control and effectiveness in automated MIG / MAG welding compared to conventional processes ,” summarised Martin Hartke , Head of Welding Process Technology , EWM . n
www . ewm-group . com / en /
Automatic calibration for waterjet cutting
In precision waterjet cutting , tool change is a critical step . When a cutting tool is to be changed , careful calibration is required to ensure that precision is maintained . With Water Jet Sweden ’ s new Auto TCP Calibration Tool , calibration can be performed automatically .
“ It takes a fraction of the time , requires no special skills and always provides accurate results ,” WJS told ISMR .
The Auto TCP Calibration Tool consists of special software that plugs into the control system , a measuring probe with a base plate and a calibration ball . The product is used for all types of angled cutting i . e . machines that are equipped with Alphajet , Beveljet or FiveX cutting heads .
“ For an experienced operator , manual calibration normally takes 15-30 minutes ,” explained Stefan Johansson , System Developer , Water Jet Sweden . “ If you are unaccustomed to it , it can take even longer . With the new Auto TCP Calibration Tool , the measurement takes just threefive minutes but above all , you avoid the human factor and minimise the risk of errors . All changes are verified in a log that is saved .”
The Auto TCP Calibration Tool will be launched in the USA at the FABTECH trade fair in Orlando ( 15-17 October 2024 ) on stand S11170 ( Hall North / South ). The following week , it will be released in Europe ( Hall 12 , stand H116 ) at the EuroBLECH trade show in Hanover , Germany , on 22 – 25 October 2024 .
Water Jet Sweden has been building machines with lifelong service since 1993 . Support is offered 24 / 7 . It has customers in over 40 countries . n
www . waterjetsweden . com
136 | ismr . net | ISMR October 2024