TIG welding process with dynamic feeding: a characterization approach
Wire forward and backward oscillation in automatic feeding tungsten inert gas (TIG) process have been pointed as a simple technique to achieve high productivity levels and process stability for a wider operation range, compared to the conventional version. However, in this case, physical aspects related to the involved phenomena are still not fully understood. Based on that, the present paper addresses a characterization analysis of low frequency dynamic wire feeding process, in order to yield some contribution to the knowledge gain of these phenomena. Both conventional automatic feeding and autogenous process were taken as a reference. The study covers system description as well as metal transfer modes, welding pool temperature gradient, and respective weld geometry. Bead on plate welding was performed and monitored with high-speed and thermographic cameras. Dynamic oscillation showed good stability and proved to be more flexible among other versions, as feeding speed and power do not need to be correlated. In order to enable proper wire dynamic movement monitoring, a special motion measuring system was developed.
KeywordsGTAW Wire oscillation Physical aspects Automatic feeding Weld pool manipulation
Unable to display preview. Download preview PDF.
The authors thank the Welding and Mechantronics Institute (LABSOLDA) staff for the technical support.
This study was financially supported by CNPq.
- 6.Fortain JM, Rimano L, Vaidya V (2008) Innovative process improves welding of sheet metal parts. Weld J:2–8Google Scholar
- 8.Liu YK, Shau Z, Zhang YM (2014) Learning human welder movement in pipe GTAW : a virtualized welding approach. Weld J 93:388s–398sGoogle Scholar
- 11.Traidia A, Roger F, Guyot E, Schroeder J, Lubineau G (2012) Hybrid 2D-3D modelling of GTA welding with filler wire addition. Int J Heat Mass Transf 55:3946–3963. https://doi.org/10.1016/j.ijheatmasstransfer.2012.03.025 CrossRefGoogle Scholar
- 12.Chen JS, Lu Y, Li XR, Zhang YM (2012) Gas tungsten arc welding using an arcing wire. Weld J 261–s–269–sGoogle Scholar
- 14.Kim Y-S, Eagar TW (1993) Analysis of metal transfer in gas metal arc welding. Weld J June:269s–278sGoogle Scholar
- 17.Rudy JF (1982) Development and application of dabber gas tungsten arc welding for repair of aircraft engine, seal teeth. ASME 1982 International Gas Turbine Conference and Exhibit. 2–5Google Scholar
- 18.Kou S, Wang YH (1986) Weld pool convection and its effect. Weld J 65:63–70Google Scholar
- 19.Wang Y, Qi B, Cong B (2017) Arc characteristics in double-pulsed VP-GTAW for aluminum alloy. 249:89–95. doi: https://doi.org/10.1016/j.jmatprotec.2017.05.027