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http://dx.doi.org/10.5781/JWJ.2014.32.6.64

A Study on Correlationship between the Induced Plasma and Emission Signals for In-process Monitoring in Stainless Steel Welding of Fiber Laser (I) - Properties Changes of the Measured Signals in a Thin 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. 64-69 More about this Journal
Abstract
The applications by using fiber laser have increased recently. However, due to high beam quality of fiber laser, it is inappropriate to apply the existing laser welding monitoring technology to the fiber laser welding as it is. On this study, thus, we analyzed emission signal with RMS and FFT for the in-process monitoring during fiber laser welding. 12mm-thick 304L stainless steel sheet was used in fiber laser welding and the result showed as follows: The intensity changes in RMS did not clarify the distinction between full penetration and partial penetration. However, as welding speed increases, specific frequency also increases in regards of frequency analysis by using FFT.
Keywords
Fiber laser; In-process monitoring; Plasma; Emission signal; Lap joint; Butt joint; STS 304L; RMS; FFT;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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