Improvement of welding heat source models for TIG-MIG hybrid welding process |
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| Institution: | 1. Dipartimento di Ingegneria dell’Impresa, Università degli Studi di Roma “Tor Vergata”, Via del Politecnico, 1, 00133 Roma, Italy;2. Dipartimento di Economia ed Impresa, Università degli Studi della Tuscia, Via del Paradiso, 47, 01100 Viterbo, Italy;1. Mechanical and Metallurgical Division, Welding and NDT Research Center (CSC), BP. 64, Cheraga, Algeria;2. INRA, Research Unit BIA, rue de la Géraudière, 44316, Nantes, France;3. University of Paris-Est, Institut de Recherche en Constructibilité, ESTP, 28 avenue du Président Wilson, 94234, Cachan, France;4. Institute of Industry Technology, Guangzhou & Chinese Academy of Sciences (IIT, Z&CAS), R&D Building, Haibin Rd, Nansha District, Guangzhou, China;5. Department of Mechanical Engineering, University of Technology of Belfort Montebeliard, France;6. Department of Mechanical Engineering, University of Saad Dahlab, BP 270, route de Soumaa, Blida, Algeria;1. The Norwegian University of Science and Technology, Department of Engineering Design and Materials, Richard Birkelands vei 2B, NO-7043 Trondheim, Norway;2. SINTEF Materials and Chemistry, P.O. Box 4760 Sluppen, NO-7465 Trondheim, Norway;3. Lappeenranta University of Technology, Laboratory of Laser Processing, Tuotantokatu 2, Lappeenranta 53850, Finland;4. Machine Technology Centre Turku Ltd, Lemminkäisenkatu 28, FI-20520 Turku, Finland |
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| Abstract: | Tungsten inert gas-metal inert gas (TIG-MIG) hybrid welding process is an effective way to improve welding productivity and quality due to advantages of the two processes. Mathematical analysis is crucial to fundamentally understand this synergetic welding process. In this study, based on experimental visualization of arc behaviors, some assumptions are proposed to deduce adaptive plane and volumetric heat source models separately for each involved welding method first. The influence of torch angles on distribution of temperature and geometry of weld bead are calculated and compared with experimental results. It shows that this developed algorithm of heat source can be employed to accurately predict welding process whether the electrode gun is slanted backward or forward to the direction of welding. Then TIG-MIG hybrid welding process is simulated and analyzed without considering the attractive or repulsive force of two arcs. The characteristic of TIG-MIG welding process is discussed compared to single MIG. It lays the foundation for the further research on the interaction of the two arcs during TIG-MIG hybrid welding. |
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| Keywords: | Adaptive heat source Numerical simulation Hybrid welding |
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