Minimisation of specific cutting energy consumption in the turning of Al 6063 alloy through optimisation by TOPSIS approach

摘要: Parametric optimisation of the turning process parameters was carried out for Al 6063 alloy machined with tungsten carbide uncoated inserts using the TOPSIS approach. All experiments were performed in line with Taguchi L27 orthogonal array. Two machining characteristics namely specific cutting energy (SCE) and surface roughness were measured during the turning experiments. The optimum parameter combination was obtained for minimising SCE. By comparing the initial parameter settings with the optimum parameters, SCE consumed decreased by 84.53%. Meanwhile, an increase in surface roughness was noticed by 40.33% using a multi-response index (MRI). From the mean response value of MRI, it was found that the critical turning parameter that influences output performance is cutting speed, followed by feed rate and depth of cut. The SCE of Al 6063 alloy at the optimal parameter is 0.71 J/mm3.