Stabilization of high-current buried-arc welding using large diameter ϕ1.6 mm wire by low-frequency modulated voltage control. Issue 4 (3rd June 2021)

• Record Type: Journal Article
• Authors: Baba, Hayato; Komen, Hisaya; Igarashi, Tomoya; Kadota, Keiji; Era, Tetsuo; Terasaki, Hidenori; Tanaka, Manabu
• Is Part Of: Welding international. Volume 35:Issue 4-6(2021)
• Page Start: 200
• Page End: 213
• Publication Date: 2021-06-03
• Subjects: High current -- buried arc -- GMAW -- current/voltage waveforms control; Welding -- Periodicals; Welding -- Automation -- Periodicals; 671.52
• DOI: 10.1080/09507116.2021.1980301
• Languages: English
• ISSNs: 0950-7116

Abstract

ABSTRACT: The authors focused on a buried-arc phenomenon for a high-efficiency thick-plate welding and developed a 'low-frequency modulated voltage control' in order to stabilize a buried arc in a high-current range, which repeats high and low voltage terms using a welding power source with constant-voltage characteristics. When the control was applied to high-current buried-arc welding using solid wires of φ 1.2 mm and φ 1.4 mm, a rotating transfer mode was observed at a high voltage term. It was clarified that a high-current buried-arc phenomenon was stabilized by supporting the buried space with a rotating arc. On the other hand, when the low-frequency modulated voltage control was applied to a solid wire of φ 1.6 mm, it was revealed that a rotating transfer mode was not observed although the control was effective in stabilizing a high-current buried-arc phenomenon. Our study shows its stabilization mechanism based on the experimental observation of the difference in arc phenomena during a buried-arc welding with and without low-frequency modulated voltage control, in this paper. Applying this result, we additionally report a high-efficiency thick-plate welding with a low wire feed rate condition.