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CREEM 2022 - XXVIII Congresso Nacional de Estudantes de Engenharia Mecânica
PRELIMINARY CHARACTERIZATION OF THE THERMAL AND ELECTRICAL BEHAVIOR OF STUD WELDING
Alisson Fernandes da Rosa , RS , Brazil
Co-Authors: Alisson Fernandes da Rosa, Felipe Batista, Regis Henrique Goncalves e Silva
Presenter: Alisson Fernandes da Rosa
The Stud Welding process, initially employed during World War II, is widely used in the current industry, finding application in shipbuilding, civil construction, and automotive sectors. In this context, the objective of this study is to preliminarily evaluate the thermal and electrical behavior of the Stud Welding process for fastening threaded studs used in metallic structures in the off-shore sector. The analyses were carried out using the thermography technique to measure the maximum temperature on the back of ½ inch thick plates and 10 and 20 mm diameter studs, welded in the flat position, in addition to measuring the electrical signals, such as current, voltage and power of the process by a portable welding electrical signal acquisition system. The study verified the maximum temperature reached on the backside of the pieces, the evolution of the thermal behavior and the oscillograms of the Stud Welding process by drawn arc. The welding of the M10 stud showed a maximum temperature equivalent to 106.6°C, with a cooling time of approximately 25 seconds after the beginning of the process. On the other hand, welding the M20 stud resulted in a maximum temperature equivalent of 208.3°C, with cooling of approximately 150 seconds to near room temperature. The results of this preliminary study suggest that the imminent risk to components that remain on the back of metal structures, such as paint or insulation is reduced, due mainly to the higher heat exposure time on the back of the sheets.
Stud welding, Arc Welding, Offshore Welding., Infrared thermography