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Hot Wire Laser Welding of Multilayer for Narrow Gap - Analysis of Wire Melting/Transfer and Arc Formation Phenomenon by High Speed Imaging -

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

  • Kim, Kyounghak (Dept. of Welding and Joining Science Engineering, Chosun University) ;
  • Bang, Hansur (Dept. of Welding and Joining Science Engineering, Chosun University) ;
  • Bang, Heeseon (Dept. of Welding and Joining Science Engineering, Chosun University) ;
  • Kaplan, Alexander F.H. (Dept. of Engineering Sciences and Mathematics, Lulea University of Technology) ;
  • Nasstrom, Jonas (Dept. of Engineering Sciences and Mathematics, Lulea University of Technology) ;
  • Frostevarg, Jan (Dept. of Engineering Sciences and Mathematics, Lulea University of Technology)
  • 김경학 (조선대학교 용접.접합과학공학과 대학원) ;
  • 방한서 (조선대학교 용접.접합과학공학과) ;
  • 방희선 (조선대학교 용접.접합과학공학과) ;
  • ;
  • ;
  • Received : 2016.09.28
  • Accepted : 2016.10.19
  • Published : 2016.10.31

Abstract

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.

Keywords

References

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