Abstract
Gas metal arc welding (GMAW) processes are used in a wide range of applications due to their high productivity and flexibility. Nevertheless, the supplied melting wire electrode leads to a coupling of material and heat input. Therefore, an increase of the melting rate correlates with an increase of the heat input by the arc at the same time. A possibility to separate material and heat input is to use an additional wire, which reduces penetration and worsens the wetting behaviour. Consequently, bead irregularities such as bonding defects or insufficient root weldings can occur. In the context of this article, a controlling system for a two-dimensional magnetic arc deflection is presented, which allows to influence arc position as well as material transfer. The analysed GMAW hot wire process is characterised by high melting rates while also realising a sufficient penetration depth and wetting behaviour.
Highlights
Gas metal arc welding (GMAW) is used in many fields like machine and plant construction, automotive applications or the offshore industry due to its high productivity and direction independence
An increased melting rate with simultaneously reduced heat input can be achieved by adapting the temperature distribution at the workpiece
The adjustment of the thermal field can be achieved by combining a GMAW hot wire process with a two-dimensional magnetic arc deflection
Summary
Gas metal arc welding (GMAW) is used in many fields like machine and plant construction, automotive applications or the offshore industry due to its high productivity and direction independence. The development of high-performance processes using multiwire technology increased the deposition rate and the productivity significantly [1,2,3]. The application of GMAW high-performance processes using multiple arc-conducting electrodes, such as tandem welding or double wire welding, always involve a high heat input into the base material due to the coupling of heat input and filler wire supply. The high time and location-dependent heat input leads to an increase of residual. Recommended for publication by Commission XII - Arc Welding Processes and Production Systems
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