EWM React combines the short arc process with digital welding process control. This is complemented by a dynamic torch drive. The solution consists of a Titan XQ R power source with integrated RCC module and the new React control system. "React" stands for "Reversing actively controlled transfer". By regulating the welding voltage, the welding current and by moving the wire forwards and backwards, the welding droplet is transferred into the weld pool in a controlled manner.
Active and dynamically controlled retraction
First, the wire is moved towards the weld pool at high speed while the arc burns onto the weld pool and produces 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 high process stability.
Welding speed doubled
The active wire movement in the high frequency range is generated using a new EWM robot torch with a highly dynamic motor. Thanks to the high process stability, welding speeds twice as high as with a classic short arc can be achieved. 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).