Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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A Study on Correlationship between the Induced Plasma and Emission Signals for In-process Monitoring in Stainless Steel Welding of Fiber Laser (II) - Properties Changes of the Measured Signals in a Thick Plate Welding -

파이버 레이저의 스테인리스강 용접시 인프로세스 모니터링을 위한 유기 플라즈마와 방사신호간의 상관성 연구(II) - 후판 용접시 측정신호의 특성 변화 -

  • Lee, Chang-Je (R&D Institute, BEST F.A Co., Ltd.) ;
  • Kim, Jong-Do (Division of Marine Engineering, Korea maritime and Ocean University)
  • 이창제 (베스트에프에이(주) 기술연구소) ;
  • 김종도 (한국해양대학교 해사대학 기관공학부)
  • Received : 2014.11.20
  • Accepted : 2014.12.26
  • Published : 2014.12.31
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Abstract

On this study, we researched the in-process monitoring during fiber laser welding as well as on the first paper. On the previous/formal study, we analyzed the change of emission signal on thin plate welding. On this study, however, we analyzed RMS and FFT with emission signals in laser welding on lap joint and butt joint of 8mm-thick 316L stainless steel. As the result, the movement of specific frequency peak was observed according to welding speed changes. Furthermore, frequency peak as a result of FFT on the thick plate welding are much clearer than on the thin plate welding. Therefore, it is expected that the welding parameter changes can be predicted in case of applying FFT to in-process monitoring.

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References

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