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An investigation of dynamical metal transfer in GMAW—Effects of argon shielding gas
Affiliation:1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150000, China;2. Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai 264209, China;3. Shandong Institute of Shipbuilding Technology, Weihai 264209, China;1. Through Life Engineering Services Centre, Cranfield University, Cranfield, United Kingdom;2. Operations Excellence Institute, Cranfield University, Cranfield, United Kingdom;3. Welding Engineering and Laser Processing Centre, Cranfield University, Cranfield, United Kingdom;1. Joining and Welding Research Institute (JWRI), Osaka University, 11-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan;2. Murata Welding Laboratories, Ltd, 532-0012 Osaka, Yodogawaku 4-6-11, Japan;3. Shanghai Key Laboratory of Material Laser Processing and Modification (Shanghai Jiao Tong University), Shanghai 200240, PR China;1. School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Sichuan 611731, China;2. UNIDEMI, Department of Mechanical and Industrial Engineering, NOVA School of Science and Technology, NOVA University Lisbon, 2829-516 Caparica, Portugal;3. School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, China;4. School of Material Science and Engineering, Tianjin University, Tianjin 300072, China;1. Centre for Advanced Materials Joining (CAMJ), Department of Mechanical & Mechatronics Engineering, University of Waterloo, 200 University Avenue West, Waterloo, ON, N2L 3G1, Canada;2. Liburdi Engineering Limited, 400 Highway 6 North, Dundas, ON, L9H 7K4, Canada
Abstract:The unbalance radial electromagnetic force was firstly obtained by measuring the real-time input electrical impedance of GMAW. This force acts as an attaching force because it pushes the droplet aside of the welding wire and sticks on the tip of welding wire as result of surface tension force. In spray transfer mode, lower unbalance radial electromagnetic force was observed when argon shielding gas was used. The finding presented in this paper is contrary to the literature which reported that higher electromagnetic force is desirable for faster transfer rate of droplets in spray transfer mode.
Keywords:GMA welding  Real-time input electrical impedance  Electromagnetic force  Argon shielding gas  Spray transfer mode
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