Significant Reduction in Energy Consumption and Carbon Emission While Improving Productivity in Laser Drilling of CFRP Sheets with a Novel Stepped Process Parameter Parallel Ring Method

Although laser drilling of carbon fibre-reinforced polymer (CFRP) composites offers the advantages zero tool-wear and avoidance fibre delamination compared with mechanical drilling, it consumes considerably more energy during process. This research shows that by using a new, stepped parameter parallel ring hole method, an saving 78.10% 18.37 gCO2 reduction for each hole, while improving productivity than 300%, can be achieved in 6 mm diameter holes CFRP sheets 2 thickness, previous methods under same quality. The key reason this is increase input to inner rings enabling rapid removal material, lower outer provides shielding trench reduce heat loss into parent material. results are single-ring multiple-ring constant processing parameters, discussion given on comparing future prospects, including combined pre-scribing