Tomographic spectroscopic observation of argon and metal vapor behavior in MIG arc welding

作者：Nomura Kazufumi; Kataoka Kotaro; Mimura Kohei; Hirata Yoshinori; Kishi Takashi

来源：Welding in the World, 2016, 60(1): 117-125.

DOI：10.1007/s40194-015-0267-7

• Spectroscopy
• Plasma
• Optics
• Imaging
• Measurement
• Globular transfer
• Spray transfer

Spectroscopic measurements for GMA phenomena have been performed. The studies have reported that the metal vapor behavior greatly affects the arc properties. However, they can be applied only to axially symmetric phenomena because of the assumption used for the measurement. GMA welding is normally performed while moving and most of the phenomena become axially asymmetric. In this study, we constructed a simultaneous and multi-directional measurement system using multiple CCD cameras which can capture such axially asymmetric GMA phenomena. We measured the arc radiation by means of two types of narrowband interference filters for Ar and Fe during one measurement and observed axially asymmetrical intensity distributions in the globular and spray transfer mode. We found that the globular transfer mode that has seemingly chaotic distribution can be regarded as a distribution where the deviation of Ar is larger than Fe from an axially symmetric double-ring distribution.

• 出版日期2016-1