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激光深熔焊过程熔池小孔发声数值计算与试验分析

敖三三, 罗震, 黄尊月, 冯梦楠

敖三三, 罗震, 黄尊月, 冯梦楠. 激光深熔焊过程熔池小孔发声数值计算与试验分析[J]. 焊接学报, 2016, 37(11): 93-98.
引用本文: 敖三三, 罗震, 黄尊月, 冯梦楠. 激光深熔焊过程熔池小孔发声数值计算与试验分析[J]. 焊接学报, 2016, 37(11): 93-98.
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AO Sansan, LUO Zhen, HUANG Zunyue, FENG Mengnan. Numerical calculation and experimental analysis based on acoustic emission of molten pool keyhole in laser deep penetration welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(11): 93-98.
Citation: AO Sansan, LUO Zhen, HUANG Zunyue, FENG Mengnan. Numerical calculation and experimental analysis based on acoustic emission of molten pool keyhole in laser deep penetration welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(11): 93-98.
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激光深熔焊过程熔池小孔发声数值计算与试验分析

  • 天津大学 材料科学与工程学院, 天津 300072

基金项目: 国家自然科学基金资助项目（51405335、51275342）；中国博士后特别资助项目（2014T70212）

Numerical calculation and experimental analysis based on acoustic emission of molten pool keyhole in laser deep penetration welding

  • School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China

摘要

    摘要
  • 摘要: 激光深熔焊过程中产生的声信号是激光焊接过程质量检测的重要参量.文中对3.5 mm厚的低碳钢板进行焊接速度分别为3，4和5 cm/s的工艺试验，得到了三种典型的熔池小孔，即平底形熔池小孔、锥形熔池小孔和匙形熔池小孔.通过对声信号的频谱分析，得到这三种不同形状的熔池小孔的共振频率分别为：1 503.9 Hz、1 894.53 Hz和2 792.96 Hz.同时，文中对试验得到的三种形状的熔池小孔发声过程进行了数值分析，得到了对应的共振频率，分别为：1 453.125 Hz、1 890.625 Hz和2 750 Hz.数值计算得到的结果与试验结果误差在5%范围内.结果表明，文中所建立的熔池小孔模型能很好的反映出实际的焊接过程声信号的声场分布，为声信号在质量检测中的应用提供理论基础.
    Abstract: Acoustic signal generated in the laser deep penetration welding process is an important parameter for quality detection. In this paper, welding experiments were performed on a 3.5 mm thick carbon steel plate with welding speed of 3 cm/s, 4 cm/s and 5 cm/s respectively. Three typical keyhole shapes of were obtained, namely flat shape, conical shape and spoon shape. The resonant frequencies of the acoustic signal of three typical keyholes obtained in the experiments are 1503.9Hz, 1894.53Hz and 2792.96Hz by time-varying frequency analysis s. The predicted oscillation frequencies of the keyholes by simulation are 1453.125 Hz, 1890.625 Hz and 2 750 Hz, which agree the experimental results within 5% errorss. The results show that the proposed model for predicting the acoustic radiation generated by the keyhole vibration in laser deep penetration is effective.
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    • 参考文献(15)
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  • 收稿日期:  2014-10-26

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