Advanced Search
SHAN He, LUO Zhen, ZHANG Chengda, AO Sansan, MENG Fanliang. Mechanism of sound source in laser deep penetration welding process[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(8): 26-30.
Citation: SHAN He, LUO Zhen, ZHANG Chengda, AO Sansan, MENG Fanliang. Mechanism of sound source in laser deep penetration welding process[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(8): 26-30.

Mechanism of sound source in laser deep penetration welding process

More Information
  • Received Date: November 19, 2015
  • Acoustic signal is an important parameter in laser welding process, and the understanding of mechanism of the laser acoustic signal is not deep enough. A thorough research on the mechanism of sound source and keyhole profile during laser deep penetration welding process were carried out. By considering the Helmholtz effect in acoustics, the relationship between the morphology of the keyhole and the intensity of the sound signal and the resonance frequency was obtained through the acoustic-electric analogy. CCD image acquisition system was used to obtain the actual shape of the hole, and the rationality of the results obtained from the theoretical study was verified. Through the acoustic signal acquisition system, the acoustic data in laser welding process were acquired, and the amplitude spectrum of sound field was obtained by the fast FFT transform. The results show that the experimental results are in good agreement with the theoretical values, and the proposed acoustic mechanism of keyhole is suitable for application.
  • 骆红, 胡伦骥, 胡席远, 等. 激光焊接过程中小孔行为对光、声的影响[J]. 中国机械工程, 1998, 11:88-89+4. Luo Hong, Hu Lunji, Hu Xiyuan, et al. The influence of keyhole behavior in laser welding process to light and sound[J]. China Mechanical Engineering, 1998, 11:88-89+4.
    秦国梁, 林尚扬. 激光焊接体能量及其对激光深熔焊缝熔深的影响[J]. 焊接学报, 2006, 27(7):74-76. Qin Guoliang, Lin Shangyang. Laser welding volume energy and it's influence to the weld penetration of laser penetration welding[J]. Transactions of the China Welding Institution, 2006, 27(7):74-76.
    秦国梁, 杨永波, 李连胜, 等. Nd:YAG CW激光热传导焊Ⅱ激光热传导焊临界功率的计算[J]. 焊接学报, 2003, 24(3):23-26+100. Qin Guoliang, Yang Yongbo, Li Liansheng, et al. Nd:YAG CW laser conduction welding[J]. Transactions of the China Welding Institution, 2003, 24(3):23-26.
    刘京雷, 陈彦宾, 徐庆鸿. 激光焊接声信号与熔深的相关性[J]. 焊接学报, 2006, 27(1):72-75. Liu Jinglei, Chen Yanbin, Xu Qinghong. The correlation of acoustic signal and penetration in laser welding[J]. Transactions of the China Welding Institution, 2006, 27(1):72-75.
    Chanaud R C. Effects of geometry on the resonance frequency of Helmholtzresonators[J]. Journal of Sound and Vibration, 1994, 178(3):337-348.
    李秋实, 胡永明. 亥姆霍兹共振器结构参数对放大性能的影响[A]//中国声学学会. 2008年全国声学学术会议论文集[C]. 中国声学学会:2008:2.
    陈武柱, 贾磊, 张旭东, 等. CO2激光焊同轴视觉系统及熔透状态检测的研究[J]. 应用激光, 2004, 24(3):130-134. Chen Wuzhu, Jia Lei, Zhang Xudong, et al. CO2 laser welding coaxial visual system and research of penetration status detection[J]. Applied Laser, 2004, 24(3):130-134.
    张旭东, 陈武柱, 刘春, 等. CO2激光焊接的同轴检测与熔透控制Ⅲ.板厚变化时熔透状态同轴光信号分析[J]. 焊接学报, 2006, 27(1):13-16. Zhang Xudong, Chen Wuzhu, Liuchun, et al. CO2 laser welding coaxial detection and penetration contral[J]. Transactions of the China Welding Institution, 2006, 27(1):13-16.
    齐秀滨. 激光焊接过程视觉传感技术的发展现状[J]. 焊接学报, 2008, 29(2):108-112. Qi Xiubin. The present development situation of vision sensing technology in laser welding process[J]. Transactions of the China Welding Institution, 2008, 29(2):108-112.
    S Li, G Chen, M Zhang, et al. Dynamic keyhole profile during high-power deep-penetration laser welding[J]. Journal of Materials Processing Technology, 2013(214):565-570.
    Mingjun Zhang, Genyu Chen, Yu Zhou, et al. Direct observation of keyhole characteristics in deep penetration laser welding with a 10 kW fiber laser[J]. Optical Society of America, 2013, 21(17):103-109.
    秦国梁, 林尚扬. Nd:YAG激光深熔焊接过程中小孔的形态特征[J]. 焊接学报, 2006, 27(1):81-84. Qin Guoliang, Lin Shangyang. The keyhole morphological character in Nd:YAG laser penetration welding process[J]. Transactions of the China WeldingInstitution, 2006, 27(1):81-84.
    Kroos J. Dynamic behavior of the keyhole in laser welding[J]. Journal of Physics D:Applied Physics, 1993, 26(3):481-486.
    陈晓锋. 激光深熔焊接厚板细长小孔瞬态形成过程模拟研究[D]. 湖南大学, 2014.
    Mao Y L, Kinsman G, Duley W W. Real-time fast Fourier transform analysis of acoustic emission during CO2 laser welding of materials[J]. Journal of Laser Applications, 1993, 5(2):17-22.
  • Related Articles

    [1]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.
    [2]LIU Lijun, LIU Xueyang, LAN Hu, ZHANG Weijie, JIA Zhixin, LI Jiqiang. Splash control of laser mould strengthen based on coaxial visual supplemented by acoustical signal[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2015, 36(3): 9-13.
    [3]LIU Lijun, JIANG Yaqing, DI Tienan, LI Jiqiang, JIA Zhixin, YANG Wenhao. HHT analysis of acoustic signal characteristics caused by defocusing amount fluctuation on laser strengthened mould surface[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2013, (9): 51-54.
    [4]MENG Xuanxuan, WANG Chunming, HU Xiyuan. Analysis of optical and acoustic signals in CO2 laser butt welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2011, (7): 95-99.
    [5]LIU Lijun, WANG Qi, LAN Hu, ZHENG Hongyan, LI Feng. Feature extraction of arc sound signal in MIG welding based on linear prediction analysis[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2010, (7): 35-38.
    [6]BI Shujuan, LAN Hu, LIU Lijun. On-line monitoring of penetration status based on characteristic analysis of arc sound signal in MAG welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2010, (5): 17-20.
    [7]LIU Lijun, LAN Hu, YU Zhongwei, ZHOU Bintao. Reducing noise techniques of arc sound signal[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2009, (12): 13-16.
    [8]MA Yue-zhou, QU Min, CHEN Jian-hong. SVM classifier for wire extension monitoring using arc sound signal in GMAW[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2006, (5): 21-26.
    [9]LIU Jing-lei, CHEN Yan-bin, XU Qing-hong. Correlation of acoustic signals and weld depth in laser welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2006, (1): 72-75,80.
    [10]WAIG Hai-yan, CHEN Qiang, SUN Zhen-guo, WANG Yao-wen, SUN Jiu-wen. Detection of Keyhole Size by Arc Signal Processing[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2000, (3): 24-26.

Catalog

    Article views (340) PDF downloads (139) Cited by()

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return