The welding technology manufacturer EMW from Mündersbach is launching a new welding process on the market: the EWM React. Using active wire movement, the MIG/MAG process from EWM is designed to offer maximum control during automated welding and maximise process stability. The supplier describes the EWM React as a combination of a short arc process and digital welding process control, which is supported by a highly dynamic torch drive.
„This solution consists of a Titan XQ R power source with an integrated RCC module and the new React control system“, says the welding technology manufacturer.
With „Reversing actively controlled transfer“ (React), the welding droplet is transferred into the weld pool in a controlled manner: „Both by regulating the welding voltage and the welding current as well as by moving the wire forwards and backwards. To do this, the wire is first moved towards the molten pool at high speed while the arc burns onto the molten 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.“
Twice the welding speed possible according to the supplier
According to the manufacturer, the active wire movement in the high frequency range is generated using a new EWM robotic torch with a highly dynamic motor, which leads to complete control of the droplet transfer.
Thanks to the high process stability, welding speeds can be doubled compared to the classic short arc, while the heat input can be reduced by up to around a third.
EWM cites cladding, joint welding and wire arc additive manufacturing (WAAM) as areas of application.
