Browse > Article
http://dx.doi.org/10.5781/JWJ.2014.32.6.70

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 -  

Lee, Chang-Je (R&D Institute, BEST F.A Co., Ltd.)
Kim, Jong-Do (Division of Marine Engineering, Korea maritime and Ocean University)
Publication Information
Journal of Welding and Joining / v.32, no.6, 2014 , pp. 70-74 More about this Journal
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.
Keywords
Fiber laser; In-process monitoring; Plasma; Emission signal; Lap joint; Butt joint; STS 316L; RMS; FFT;
Citations & Related Records
Times Cited By KSCI : 6  (Citation Analysis)
연도 인용수 순위
1 Berthold Kessker : Fiber Laser Welding in Car Body Shop, Journal of KWJS, 31-4 (2013), 17-22   과학기술학회마을   DOI   ScienceOn
2 Oiwa Shinpei et al. : Phenomena in Remote Welding using Fiber Laser, Journal of High Temperature Society, 34-6 (2008), 1-2 (in Japanese)
3 Xiang Dong Gao, Qian Wen and Seiji Katayama : Elucidation of Welding Stability Based on Keyhole Configuration during High-Power Fiber Laser Welding, Advanced materials research, 314/316-2 (2011), 941-944   DOI
4 Yousuke Kawahito, Masami Mizutani and Seiji Katayama : Defect Formation Mechanism and Reduction Procedure in 10 kW High Power Fiber Laser Welding of Stainless Steel, Quarterly journal of the Japan Welding Society, 26-3 (2008), 203-209   DOI   ScienceOn
5 Youngsik Kim and Sangcheol Kil : Recent Technological Tendency of Laser/Arc Hybrid Welding, Journal of KWJS, 31-2 (2013), 4-15 (in Korean)   과학기술학회마을   DOI   ScienceOn
6 H.W. Dong, M. Y. Lee and Y. S. Ahn : Micro-structure Evolution of UFG Steel Weld by Hybrid and Laser Welding, Journal of the Korea society for power system engineering, 14-3 (2010), 58-63 (in Korean)   과학기술학회마을
7 Gleb Turichina et al. : Simulation and Technology of Hybrid Welding of Thick Steel Parts with High Power Fiber Laser, Physics procedia, 12-A (2011) 646-655   DOI   ScienceOn
8 Shin Minho, Murakami Takahiro and Nakata Kazuhiro : Parametric Study on One Pass Fully-Penetrated Weld Bead Formation in Horizontal Fillet Weld T-Joint by Fiber Laser-MAG Arc Hybrid Welding for Thick Steel Plate, Japan Science and Technology Information Aggregator, 29-3 (2011) 174-180 (in Japanese)
9 C. J. Lee, J. D. kim and Y. C. Kim : Characteristics of Plasma Emission Signals in Fiber Laser Welding of API Steel (II), Journal of KWJS, 30-4 (2012), 314-320 (in Korean)
10 C. J. Lee, J. D. kim and Y. C. Kim : Characteristics of Plasma Emission Signals in Fiber Laser Welding of API Steel (III), Journal of KWJS, 31-3 (2013), 60-65 (in Korean)   과학기술학회마을   DOI   ScienceOn
11 C. J. Lee, J. D. kim and J. Suh : Characteristics of Plasma Emission Signals in Fiber Laser Welding of API Steel (IV), Journal of KWJS, 31-4 (2013), 28-33 (in Korean)   과학기술학회마을   DOI   ScienceOn