The 'TimeTwin Digital' welding system, that was invented by Fresenius in 2003, consists of two 'TransPuls Synergic' 4000 or 5000 GMAW single systems, which are connected on the control plane by a rapid digital data interface. Stable arcs paired with an excellent droplet detachment, high deposition rates, high welding speeds and the resulting low heat input can be observed during welding. The start-up phase and end-crater filling are equally as effective. The advantage of welding using two wires in a shared weld pool is that the second arc improves the circulation of the liquid weld pool, thus fusion errors and the number of pores can be reduced. By turning the welding torch, offset wire electrodes increase gap bridgeability and enable wide discharge of the capping run without weaving. A further benefit comes to light in the welding of several layers. During this process 'TimeTwin Digital' switches automatically between leading and trailing wire electrodes. The cycle times are also reduced because no end-of seam realignment is needed before a change of direction. Due to the compact torch head, easy access proves a great relief when undertaking complex welding tasks. Working with the saved programs means uniform characteristics and appearance can be achieved along the full length of the seam. Three industrial case studies (manufacturing of components for power plants, shipbuilding industry) are presented to summarize the experiences and emphasize the advantages of the technology (productivity, quality, applicability to a variety of materials).
Higher levels of quality, productivity and efficiency of welding joints
Welding and Cutting ; 7 , 1 ; 12-16
2008
4 Seiten, 3 Bilder
Article (Journal)
English
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