Abstract
With the use of pulsed gas metal arc welding processes, a regular material transfer, resulting in a good weld quality, should be reached. Ideally, in every pulse, exactly one droplet should be detached. Such ideal processes can be achieved by now, but require process knowledge and stable boundary conditions. In most cases, the process is set up in such way, that the droplet detachment is forced through a higher energy input than necessary. Thereby, the energy input is measured per pulse, independent of the moment of the droplet detachment. The aim of the research behind this paper is it to automatically decide, if a droplet has been detached. With this information, a new time interval can be used to statistically analyse the real energy input regarding the material transfer; but also a detachment control can be (and has been) realised, which forces a droplet detachment even under process disturbances or unconfident parameter choices. As a technological vision, the droplet detachment control can be used to optimise the process regarding a lower energy input. So in the last part of this paper, different possibilities of adapting pulse parameters and their potential to reduce the energy input are discussed.
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Acknowledgments
The project IGF 15.872 BG of the research association “Schweißen und verwandte Verfahren e.V.” of the German Welding Society has been supported via the AIF within the scope of the programme for the support of the Industrial Cooperative Research and Development (IGF) by the Federal Ministry of Economics and Technology. The authors would like to thank the abovementioned institutions for their support. The authors would also like to thank the German Research Foundation DFG for the support of the research work which has been carried out within the Cluster of Excellence ‘Integrative Production Technology for High-Wage Countries’.
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Doc. IIW-2387, recommended for publication by Commission XII "Arc Welding Processes and Production Systems."
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Reisgen, U., Purrio, M., Buchholz, G. et al. Possibilities of a control of the droplet detachment in pulsed gas metal arc welding. Weld World 57, 701–706 (2013). https://doi.org/10.1007/s40194-013-0069-8
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DOI: https://doi.org/10.1007/s40194-013-0069-8