Contribution of metal vapor mass at periphery part of pulsed arc to electromagnetic force in weld pool. Issue 1 (21st February 2019)

• Record Type: Journal Article
• Authors: Tanaka, Tatsuro; Maeda, Yoshifumi; Yamamoto, Shinji; Iwao, Toru
• Is Part Of: Electrical engineering in Japan. Volume 207:Issue 1(2019)
• Page Start: 15
• Page End: 23
• Publication Date: 2019-02-21
• Subjects: current density -- electromagnetic force -- electromagnetic thermal fluid simulation -- metal vapor mass -- pulsed arc; Electrical engineering -- Periodicals; 621.30952
• DOI: 10.1002/eej.23199
• Languages: English
• ISSNs: 0424-7760

Abstract

Abstract: The arc welding has been used in various welding methods because it is inexpensive and high in strength after welding. However, it is a problem that accidents such as collapse of the bridge occur because of the welding defects. The welding of low cost and high productivity is required without the welding defects. The pulsed TIG welding is inexpensive and capable of high‐quality welding. The electromagnetic force contributing to penetration changes because the transient response of arc temperature and iron vapor generated from anode occurs. However, the analysis of pulsed TIG welding with metal vapor has been elucidated only metal vapor concentration near anode with transient phenomenon and heat flux. Thus, the theoretical elucidation of penetration depth with control factor has not been researched. In this paper, the contribution of metal vapor mass at the periphery part of pulsed arc to the electromagnetic force in the weld pool is elucidated. As a result, the iron vapor mass at periphery part decreased with increasing the frequency. The iron vapor was stagnated at axial center within one cycle. The electromagnetic force to the penetration depth direction in weld pool increased at axial center. Therefore, the metal vapor mass at periphery part plays an important role for the electromagnetic force increment at axial center.