オンラインアーク溶接画像センシング手法の基礎検証 インプロセスアーク溶接品質管理技術の開発

• Published in: Yōsetsu Gakkai ronbunshū Vol. 37; no. 3; pp. 108 - 114
• Main Authors: 笠野, 和輝, 荻野, 陽輔, 浅井, 知
• Format: Journal Article
• Language: Japanese
• Published: Tokyo 一般社団法人 溶接学会 2019; Japan Science and Technology Agency
• Subjects: Arc welding; Arc welding machines; Assembly lines; Base metal; Cameras; CMOS; Defects; Equipment costs; High speed cameras; Image detection; Image sensing; In-pocess welding quality control technology; Laser beam welding; Light sources; Production lines; Quality control; Variation; Weld defects; welding phenomena just near the arc; without using external light source
• ISSN: 0288-4771; 2434-8252
• DOI: 10.2207/qjjws.37.108

To achieve both welding productivity and quality, in-process welding quality control technology is required. The authors are developing method to detect welding defects directly during welding by using image sensing technology for production lines. To detect the welding defects directly, observing the welding phenomena just near arc where the base metal is melted and defects should occur is important. Conventionally, high speed camera with laser external light source were used for observing the welding phenomena just near arc, however the cost is high and the equipment is complex for production lines. In this paper, the observation results and the required time resolution of welding phenomena just near the arc were verified by comparison with two observation method, using only an industrial CMOS camera without using an external light source and using high speed camera with laser light source. By comparison with observation result, the welding phenomena just near the arc could be observed by using only CMOS camera from backside when the molten pool flowed under the arc. And the required time resolution for observation the phenomena just near the arc was as follows, fluctuation of the arc: over 100Hz, fluctuation of the molten pool: over 60Hz, droplet transfer: over 600Hz.