Journal of Welding and Joining

  • 제24권5호
  • /
  • Pages.49-56
  • /
  • 2006
  • /
  • 2466-2232(pISSN)
  • /
  • 2466-2100(eISSN)
대한용접접합학회 (The Korean Welding and Joining Society)
권호 표지

조선용 강재의 $CO_2$레이저 GMA 하이브리드 용접에서 갭 브리징 능력 향상기술 개발

Improvement of Gap Bridging Ability in $CO_2$ Laser-GMA Hybrid Welding

  • 채현병 (한국생산기술연구원 정밀접합팀) ;
  • 김철희 (한국생산기술연구원 정밀접합팀) ;
  • 김정한 (한국생산기술연구원 정밀접합팀) ;
  • 이세헌 (한양대학교 공과대학 기계공학부)
  • 발행 : 2006.10.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

For laser welding in shipbuilding industry, gap bridging capability is one of the most important characteristics to achieve the high productivity and good weld quality. Recently, laser-GMA hybrid welding process is regarded as a distinctive method to overcome the tight gap tolerance with improving the productivity. In this study, the influence of process parameters on the bead formation was experimentally analyzed and the relationship between the process parameters and geometric imperfections was investigated. It was revealed that undercut, excessive weld metal, excessive penetration and incompletely filled groove were the major geometric imperfections. The optimized wire feeding and arc pressure were necessary to ensure the gap bridging ability. The approach to select the process parameters was conducted for butt welding with up to 2mm joint gap, in which the sound weld beads were generated without changing the welding speed.

키워드

참고문헌

  1. 대한용접학회편: 용접.접합편람, 대한용접학회, 1998, 693 (in Korean)
  2. S. Herbert: Laser-Hybrid Welding of Ships, Welding Journal, 83-6 (2004), 39-43
  3. S. G. Shi and P. A. Hilton: A Comparison of the Gap-Bridging Capability of $CO_2$ Laser and Hybrid $CO_2$ Laser MAG Welding on 8mm Thickness C-Mn Steel Plate, TWI Members Report 798/2004
  4. S. G. Shi, P. A. Hilton, S. Mulligan and G. Verhaeghe: Hybrid Nd:YAG Laser-MAG Welding of Thick Section Steel with Adaptive Control, Proceedings of the 23th International Congress on Applications of Lasers & Electro-Optics 2004
  5. H. S. Kim: Study on the Laser Hybrid Welding Technology for Shipbuilding, Journal of Korean Welding Society, 22-2 (2004), 117-120 (in Korean)
  6. J. B. Lee and S. K. Hong: 조선분야의 레이저-아크 하이브리드 용접기술, 제 1회 중공업 생산성 혁신을 위한 차세대 하이브리드 용접 기술 개발 과제 심포지엄, 한국생산기술연구원, 2004, 13-28 (in Korean)
  7. K. D. Lee: Laser-Arc Hybrid Welding Process of Aluminum Alloy, Journal of Korean Welding Society, 22-2 (2004), 121-125 (in Korean)
  8. Y. Sugitani and Y. Nishi: Investigation of a Method for Optimum penetration control, Welding International, 4-2 (1990), 116-122 https://doi.org/10.1080/09507119009447690
  9. Y. Sugitani and W. Mao: Automatic Simultaneous Control of Bead height and back bead shape using an Arc Sensor in One-Sided Welding with a Backing Plate, Welding International, 9-5 (1995), 366-374 https://doi.org/10.1080/09507119509548815
  10. International Organization for Standardization: Welding-Electron and Laser-Beam Welded Joints-Guidance on Quality Levels for Imperfections; Part 1 (ISO 13919-1), ISO, 1996
  11. International Organization for Standardization: Arc-Welded Joints in Steel- Guidance on Quality Levels for Imperfections (ISO 5817), ISO, 1992
  12. H.-B. Chae, C.-H. Kim, J.-K. Kim, N.-H. Kang, J.-H. Kim and S. Rhee: The Effect of Shielding Gas Composition in $CO_2$ Laser-MIG Hybrid Welding, Proceedings of the 2004 Autumn Meeting of Korean Welding Society, 2004, 52-54 (in Korean)
  13. J. F. Lancaster: The physics of welding, 2nd edition, Pergamon Press, 1986, 221-222