Detection of Laser Melting Bionic Stripe Quality on Mould Surface Based on Acoustic Signal

Abstract:

In order to rescue the problems of controlling laser bionic strengthening local stripe of mould surface quality, it is put forward thoughts about the laser bionic local melting stripe of mould surface quality detection based on acoustic signal. Analyzed with the relationship between defocusing distance and acoustic signal characteristic, laser bionic strengthening local stripe quality, the results show that acoustic signal is weakened with the increased absolute value of defocusing distance. As the defocusing distance is 0mm, the role of the laser is primarily ablation and the stripe quality is the worst; the function of laser on the surface materials is too weak to strengthen when the defocusing distance is -4mm; laser on target surface plays its role of strengthening, mainly owing to melting, with defocusing distance of +4mm. Overall tests show that, based on the quantitative detection of acoustic signal characteristic, it could inspect and control the quality of strengthening stripe, and it will realize the overall control of laser bionic strengthening mould surface quality with guiding significance.

• Periodical: Applied Mechanics and Materials (Volumes 101-102)
• Pages: 926-929
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.101-102.926
• Online since: September 2011
• Authors: Li Jun Liu, Tie Nan Di, Zhi Xin Jia, Ji Qiang Li, Yi Qiang Wang, Hong Zhou, Xian Yi Li, Li Qiong Chen
• Keywords: Acoustic Signal, Defocusing Distance, Fast Fourier Transform (FFT), Laser Bionic Strengthening, Melting Stripe, Mould

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