내로우 갭 적용을 위한 핫와이어 송급 레이저용접 - 고속촬영을 통한 와이어 용융/이행 현상과 아크 포메이션 분석

• Published in: Journal of welding and joining Vol. 34; no. 5; pp. 26 - 32
• Main Authors: Kim, Kyounghak, Bang, Hansur, Bang, Heeseon, Kaplan, Alexander F.H, Nasstrom, Jonas, Frostevarg, Jan
• Format: Journal Article
• Language: Korean
• Published: 대한용접접합학회 01.10.2016
• Subjects: 기계공학; Narrow gap; High speed imaging (HSI); Multi-layer; Laser welding; Hot wire
• ISSN: 2466-2232; 2466-2100

In this study, Hot-wire laser welding (HWLW) without keyhole which deposits filler material by feeding hot wire into the process zone has been performed to increase process performance. From the analysis of High Speed Imaging (HSI), for higher voltage, the process is prone to arc formation and drop transfer, which is disagreeable transfer mode. It is necessary that arc formation and drop (globular) transfer should be avoided by lower voltage. Therefore, continuous wire melting and transfer mode is preferred when adopting this process. The HWLW technique has high potential in terms of performance, precision, robustness and controllability for thick section of narrow gap.