• Title/Summary/Keyword: welding distortion

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A Study on the Welding Distortion at the FCA Intermittent Fillet Weldment of Thin plate (박판 단속 Fillet 용접부의 변형 특성에 관한 연구)

  • Sin, Dae-Hui;Sin, Sang-Beom;Lee, Ju-Seong
    • Proceedings of the KWS Conference
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    • 2006.10a
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    • pp.51-53
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    • 2006

  • The purpose of this study is to establish the predictive equation of angular distortion and longitudinal shrinkage force at the intermittent fillet weldment using FEA and experiment. The angular distortion and shrinkage force of the intermittent fillet weldment linearly increases with an increase in the ratio of weld length(Lw) to weld span(Ls). Based on the results, The predictive equation of distortion at the intermittent fillet weldment was defined as a linear function of Lw/Ls and the predictive equation of the distortion for continuous fillet weldment.

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Analysis of Laser Weldment Distortion in the EDFA LD Pump Packaging (광신호 증폭기 EDFA LD 펌프 패키징 레이저 용접부 변형 해석)

  • Gang, Dae-Hyeon;Son, Gwang-Jae;Yang, Yeong-Su
    • Journal of the Korean Society for Precision Engineering
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    • v.18 no.1
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    • pp.139-146
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    • 2001

  • This paper presents a study on heat transfer and residual distortion analysis of laser welded EDFA(Erbium Doped Fiber Amplifier) LD(Laser Diode) Pump using the finite element method. In the production process of LD Pump in light-wave communication system, ferrule and saddle are welded by Nd-YAG laser. These parts experience thermal and mechanical effect during heating and cooling cycle with the laser welding. Thus distortion happens in the laser-welded packaging, and it makes an error in detecting the light signal translate through optical fiber in LD Pump. The amount of final displacement produced by the laser welding is predicted using the finite element method. And the optimal shape of saddle is proposed with the results of numerical analyses to minimize the displacement.

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