In addition to cutting and drilling, the bonding and welding of carbon fiber reinforced composite parts is also very important, because traditional riveting and other types of fastening techniques need to drill holes in the material, and damage to the fibers during the drilling process Destroy the strength of components.
Therefore, adhesive bonding is a suitable and commonly used technology for joining carbon fiber reinforced composite parts. However, it is necessary to clean the residue and debris on the surface of the part during the molding process. Thorough cleaning and surface texture of the parts without damaging the fibers are essential for achieving higher connection strength.
The painting of carbon fiber reinforced composite parts is also very challenging, because this material has low surface wettability and poor surface adhesion, which can be improved by laser pointer processing. It is necessary to perform thorough laser removal and surface texture before painting to improve surface wettability.
Studies have shown that, compared with infrared lasers for texturing, parts textured with UV lasers have higher lap shear strength. As shown in the figure, using an average power greater than 60W for area removal and surface texture at a speed of 80mm2/min will not cause any visible damage to the fiber.
It proves that the application of ultraviolet nanosecond pulsed laser in the processing of carbon fiber reinforced composite materials is extremely promising. The laser’s high power and programmable pulse width/shape can simultaneously achieve high quality and speed when processing carbon fiber reinforced composite materials, including cutting, drilling, surface texture and cleaning.
With this high-power laser, we can achieve a high processing speed while ensuring a low heat-affected zone and not damaging the carbon fiber. We are also actively conducting more in-depth research, developing to other processing units and thicker materials, and conducting extended research on the influence of green laser pointer parameters on the processing of carbon fiber reinforced composite materials.