In this research, Taguchi method was applied to find the optimal values of minimum quantity lubricant (MQL) condition in hard turning of SKD 61 with consideration of reduced surface roughness. The performance characteristics of MQL parameters (cutting fluid type, pressure and fluid flow) were studied by using a L9 array, the signal-to-noise ratios and analysis of variance (ANOVA). In result of the present study, the lubricant and the pressure of MQL condition are the most influential factors which give statistic significant effect on machined surfaces. In addition, the optimal condition of the MQL mode to reduce the roughness was also presented.
MQL; hard turning; SKD61 alloy steel; Taguchi method; surfac roughness
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