Abstract
The behaviors of electrode displacement and force during spot welding under various conditions, such as different weld currents, electrode forces, and welding times, were studied. Tests were conducted on a 170 kVA MFDC spot welder. Data were collected via a multichannel high-speed data acquisition system and were analyzed with MATLAB. Behaviors of 5182 aluminum and mild steel in spot welding were compared. Results show that nugget expansion rate does not reach zero for aluminium as it does for mild steel as nugget grew to a certain size. A linear relationship is found between the nugget size and maximum expansion that facilitates online weld quality evaluation. An electrode force peak is observed and believed relevant to the sufficient nugget size.
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Andrews D R, Dunn A, Broomhead J. Dynamic deviation monitoring for resistance welding — a low budget system. Welding Research International, 1976, 6(4): 1–27
Chien C S, Kannatey-Asibu E. Investigation of monitoring systems for resistance spot welding. Welding Journal, 2002, 81(9): 195–199
Snee R K, Talor J L. Infrared monitoring of spot welding. Metal Construction, 1975, 8(3): 142–148
Gedeon S A, Sorensen C D, Ulrich K T, Eagar T W. Measurement of dynamic electrical properties. Welding Journal, 1987, 66(12): 378–385
Burbank G E, Taylor W D. Ultrosonic in-process inspection of resistance spot welds. Welding Journal, 1965, 44(5): 193–198
Ji C T, Zhou Y. Dynemic electrode force and displacement in resistance spot welding of aluminum. Journal of Manufacturing Science and Engineering, 2004, 126(3): 605–610
Janota M. The relationship between thermal expansion and the growth of a resistance spot weld. In: Proceedings of the Third International Conference on Advances in Welding Processes. Harrogate, 1974, 21–26
Robert W, Min J. Review of control systems for resistance spot welding: Past and current practices. Science and Technology of Welding and Joining, 1996, 1(1): 110–118
Hao M, Osman K A, Boomer D R, Newton C J. Developments in characterization of resistance spot welding of aluminum. Welding Journal, 1996, 75(1): 1–8
Chien C S, Asibu K. Investigation of monitoring systems for resistance spot welding. Welding Journal, 2002, 81(9): 195–199
Tang H, Hou W, Hu S J, Zhang H. Force characteristics of resistance spot welding of steels. Welding Journal, 2000, 79(7): 175–183
Fujimoto K, Nakata S, Nishikawa M. Design and construction of a loading system for resistance welding and its dynamic properties: Optimisation of the loading system in high current density spot welding with a short energizing time (1st Report). Welding International, 1997, 11(5): 371–377
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Ji, C., Deng, L. Quality control based on electrode displacement and force in resistance spot welding. Front. Mech. Eng. China 5, 412–417 (2010). https://doi.org/10.1007/s11465-010-0114-x
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DOI: https://doi.org/10.1007/s11465-010-0114-x