Methods of Increasing the Speed of the Many-Arc Welding

Abstract:

Many-arc submerged welding is used weld thick and long seams of welded steel structures. This article describes a method for increasing the speed of the many-arc welding, with evidence from the parametrical calculation of the four-arc welding mode, using the basic mathematical model of the WeldCalc software. First of all, mathematical model coefficients are calculated based on the existing weld mode. This article presents data for four-arc welding of a 28 mm thick plate. The obtained coefficients are entered in WeldCalc, which checks the compliance of the calculated welding heat input and the actual current while the sample is welded. In case of the values of heat input are discrepant, the software adjusts the coefficients. Data are corrected and and the mathematical model is adjusted according to the participation share coefficient of each arc and to the Ku coefficients of the voltage for each arc. After the welding mode is successfully reconstructed, the welding speed is increased. Thus the parameters of welding mode are changed to increase the aggregate capacity of the power source, but the heat input of welding is not changed. In order to check the new mode, the researchers have welded the rest sample and checked its geometrical dimensions of the joints (height, width, depth of penetration, square of the weld seam). The obtained results are satisfactory.

• Periodical: Materials Science Forum (Volume 843)
• Pages: 274-277
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.843.274
• Online since: February 2016
• Authors: A.M. Ulanov*, Mikhail Alekhsandrovich Ivanov
• Keywords: Four-Arc Welding, Many-Arc Welding, Welding Mode

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