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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.
Citation: 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.
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HHT analysis of acoustic signal characteristics caused by defocusing amount fluctuation on laser strengthened mould surface

  • 1.

    School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, China;Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China

  • 2.

    Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China

  • 3.

    School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, China

  • 4.

    Ningbo Donghao Die-casting Co. , Ltd. , Ningbo 315113, China

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  • Received Date: July 08, 2012
    Graphical Abstract
    • Abstract
  • During laser strengthening mould surface,the fluctuation of defocusing amount was caused by clamping and teaching errors,which greatly influenced the quality of laser strengthened mould surface.Thus,Hilbert-Huang Transform (HHT) analysis of acoustic signal characteristics caused by the fluctuation of defocusing amount on laser strengthened mould surface was put forward.According to the acoustic signal characteristics of laser strengthened mould surface,the HHT analysis steps were proposed.The mould life was improved over 20% when the mould surface was strengthened by the HHT analysis system.The experimental results provide a method for further researching and using laser strengthening acoustic signal.
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