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Mathematical Modelling of the Nd:YAG Laser Microdrilling of Aluminium 5052 for Process Optimization and Analysis of Sensitivity
S. Mahanty, N. Roy, A. Kuar and S. Mitra

Laser beam micromachining of aluminium 5052 was conducted to investigate the effect of four process parameters: lamp current; pulse frequency; pulse width; and assist gas pressure on quality characteristics of drilled hole. Hole taper and hole circularity are important attributes that effect the drilled hole quality are selected as machining responses. Response surface methodology (RSM) was used to design the experiments and to develop the mathematical model. A sensitivity analysis has been conducted on the developed mathematical model to determine the relative influence of different parameters on the process outputs.

Keywords: Nd:YAG laser, aluminium 5052 alloy, microdrilling, hole taper, hole circularity, mathematical model, response surface methodology (RSM), sensitivity analysis

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