Journal of Guangdong University of Technology ›› 2024, Vol. 41 ›› Issue (05): 97-104.doi: 10.12052/gdutxb.230119

• Mechanical Engineering • Previous Articles     Next Articles

Thermal Effects of High-frequency Femtosecond Laser Processing of CFRP

Li Zhao-yan1, Xie Xiao-zhu1,2,3, Lai Qing1, Huang Ya-jun1,2   

  1. 1. School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China;
    2. Department of Experiment Teaching, Guangdong University of Technology, Guangzhou 510006, China;
    3. State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2023-08-28 Online:2024-09-25 Published:2024-05-25

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Abstract: Laser selective quantitative removal of CFRP represents a key technology for structural repair in the aerospace industry. However, the huge difference in properties between carbon fiber and epoxy resin in CFRP makes laser processing very challenging, and thermal damage has always been the main obstacle to the widespread application of CFRP laser processing. In order to study the influence of femtosecond laser processing parameters on the machining quality of CFRP, theoretical analysis and experimental verification were carried out by single factor experimental method. The influence of laser energy density, scanning speed and scanning direction on the ablation rate and the width of heat affected zone were analyzed, and the high-precision selective quantitative removal process of femtosecond laser on CFRP was investigated. The results show that when the process parameters are chosen to be θ = 90°, pulse width of 290 fs, power of 7 W, frequency of 100 kHz, scanning speed of 300 mm/s, and scanning spacing of 60～80 μm, the overall ablation surface quality is superior, and the accuracy (roughness) can be as high as 10 μm, and the heat-affected zone (HAZ) on the surface of the removed area is about 33.9 μm.

Key words: femtosecond laser, carbon fiber reinforced plastics (CFRP), process parameters, heat affected zone, quantitative removal

CLC Number: 

  • TP241.2
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