TPT November 2024

TECHNOLOGY

EWM React technology offers full control for automated tube welding

The active wire movement in the high frequency 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 per cent. This reduces distortion to a minimum. EWM thus offers an efficient process for high-quality welding results in the application areas of cladding, joint welding and wire arc additive manufacturing. “With EWM React, we offer superior control and effectiveness in automated MIG/MAG welding compared to con- ventional processes,” said Martin Hartke, head of welding process technology at EWM.

the weld pool in a controlled manner – due to both the control of the welding voltage and welding current and the forwards and backwards movement of the wire. 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 precisely 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.

WITH EWM React, the welding technology manufacturer based in Mündersbach, Germany is launching a new welding process. Using active wire movement, EWM’s MIG/MAG welding process provides maximum control during automated welding. With this process, the full-range supplier of welding technology has maximised process stability. Users achieve up to 100 per cent faster welding speeds and higher quality results compared to conventional short arc processes. 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. “React” stands for ‘reversing actively controlled transfer’. This describes a process in which the welding droplet passes into

EWM GmbH www.ewm-group.com

EWM have developed a robot torch with a highly dynamic motor specifically for EWM React

EWM React offers maximum control and process reliability for automated MIG/MAG welding

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NOVEMBER 2024