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Basic Phenomena in Resistance Spot Welding
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1988 by SAE International in United States
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Improvement in resistance spot welding quality in sheet metal do have significant implications on the automotive manufacturing process. This paper reports on our recent effect to gain a fundamental understanding of the weld development process. A simple physical model, based on the dynamic resistance curve is presented describing the resistance changes during the process of weld development. In addition, a series of electrical and metallurgical measurements were performed to capture the temporal behavior of the weld resistance in terms of its component elements. Since the interface resistances are most affected by weld variables such as welding force and electrode cap wear, these interfaces can be major sources of weld quality variation. The results obtained provided a novel yiew of the sheet-metal welding process.
CitationLee, A. and Nagel, G., "Basic Phenomena in Resistance Spot Welding," SAE Technical Paper 880277, 1988, https://doi.org/10.4271/880277.
- Watney Dale and Nagel Gregory L., “Forms of Dynamic Resistance Welding Curves Generated during Resistance Spot Welding”. Sheet Metal, Conference. AWS, Dearborn, MI, 1984.
- Savage W.F., Nippes E.F., and Wassell F.A., “Dynamic Contact Resistance of Series Spot Welding,” Welding J., Feb., 1978, p. 43s.
- Dickinson D.W., Franklin J.E,, and Stanya A., “Characterization of Spot Welding Behavior by Dynamic Electrical Parameter Monitoring,” Spot Welding Research Supplement of Welding J., June, 1980, p. 170s.
- Havens J. R., “Controlling Spot Welding Quality and Expulsion” SME Paper AD78-279, 1976.
- Burbank G.E. and Taylor W.D., “Ultrasonic In-Process Inspection of Spot Welds”, Welding Journal, May, 1965, p. 193s; Matting A. and Wilkens G., “Testing of Spot Welds”, Ultrasonics, Oct. 1965, p. 161.
- Johnson K.I., “Resistance Welding Quality-Control Techniques”, Metal Construction and British Welding Journal, May, 1973, p. 176.
- Stiebel A., Ulmer C, Kodrack D., and Holmes B.B., “Monitoring and Control of Spot Weld Operations”. SAE Paper 860579, 1986.
- Tabor D.. The Hardness of Metals, Oxford Press, 1951, Chapter IX.
- Holm R., “Uber Kontaktwiderstande, besonders bei Kohlekontakten”, Z. Techn. Phys., 3, 1922, p. 290.
- Kohlrausch F., “Uber den stationaren Temperaturstand eines elektrich geheizten Leiters”. Ann. Phys., 1, 1900, p. 132.
- Greenwood J.A.D. and Williamson J.B.P., “Thermal Transients in Graphite-Copper Contacts”, Brit. J. Phys. 11, 1960, p. 389.
- Oh S. and Bryant M.D., “The Transient Temperature Field for two Conducting Bodies Having Different Electric Potentials”, Proc. 31st IEEE Holm Conf., Chicage, IL, 1985, p. 225.
- Dickinson D.W., “Welding in the Automotive Industry”. Am. Iron and Steel Inst. Report SG81-5. August, 1981.
- Kim Chongmin, “Microstructure of Resistance Spot Welded Mild Steel”, GMR Research Memo RM# 23-3524, 1986.