Multi-objective optimization of Nd: YAG laser cutting parameters based on BBD-SA hybrid approach

Abstract

This paper presents a Box-Behnken Design (BBD)-Simulated Annealing (SA) hybrid approach to process parameter optimization for Nd:YAG laser cutting in Ti-6Al-4V super alloy sheet. Pulse width, pulse energy, cutting speed and gas pressure are considered the dominant input process parameters whilst the kerf deviation and material removal rate are the responses. The adequacy and significance of developed models are verified by ANOVA analysis. Further, the optimization of pulsed Nd: YAG laser cutting process parameters is carried out by a feasible approach of simulated annealing (SA) algorithm to maximize the material removal rate (MRR) and minimizing of kerf deviation (KD) simultaneously. Experimental results show that the proposed approach is both effective and efficient.