With React, the welding technology manufacturer EWM from Mündersbach is launching a new welding process on the market. Using active wire movement, the MIG/MAG process from EWM enables maximum control during automated welding. The full-range supplier of welding technology thus increases process stability to a maximum. As a result, users achieve up to 100 process higher welding speeds and significantly higher quality results compared to conventional short arc processes.
© EWM
When you combine a short arc process with digital welding process control and add a highly dynamic torch drive, you get EWM React. This solution consists of a titanium XQ-R power source with integrated RCC module and the new React control system. “React” stands for reversing actively controlled transfer. This describes a process in which the welding droplet is transferred into the weld pool in a controlled manner – both by regulating the welding voltage and welding current and by moving the wire forwards and backwards.
To do this, the wire is first moved towards the weld pool at high speed while the arc burns onto the weld pool and creates a molten droplet.
As soon as the wire touches the molten metal, the droplet is short-circuited into the molten pool. The wire is then precisely pulled out of the molten pool by an active and dynamically controlled retraction and the arc is re-ignited with very low power. The combination of rapid current reduction by the RCC module and the controlled mechanical movement of the wire enables spatter-free results with maximum process stability.
Welding speed doubled – quality optimized
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 transfer 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 percent. 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 (WAAM).
“With EWM React, we offer outstanding control and effectiveness in automated MIG/MAG welding compared to conventional processes,” summarizes Martin Hartke, Head of Welding Process Technology at EWM.
Web: www.ewm-group.com
