An Investigation into CO2 Laser Trimming of CFRP and GFRP Composites

Shyha, Islam (2013) An Investigation into CO2 Laser Trimming of CFRP and GFRP Composites. Procedia Engineering, 63. pp. 931-937. ISSN 1877-7058

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Abstract

The paper outlines results for an investigation of CO2 laser trimming of fibre reinforced plastic (FRP) composites. Process variables include cutting speed, laser beam power, gas pressure and workpiece material. These have been evaluated against key response measures involving material removal rate (MRR), surface roughness and kerf width. Higher MRRs have been obtained when trimming GFRP. Maximum MRR of 8 cm3/min was acquired when trimming GFRP at 1750 mm/min, 5 bar and 2500 watt respectively. Scanning electron microscope (SEM) analysis revealed that matrix constituent in both composites incurred to elevated cutting temperature which most likely resulted in a charring/melting and adhered to the cut surface which adversely affected its quality (Ra of up to ∼ 6 μm). Maximum entry kerf width of 0.5 mm and 0.28 mm was measured for GFRP and CFRP samples respectively.

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