| Summary: | Hard drilling of AISI D2 reportedly produce accelerated
wear to the cutting tool that detrimental to the surface finish. This paper
presents the effect of drilling tool and drilling parameters by using Taguchi
method to produce minimum surface roughness under dry conditions. The
experiments were conducted using high speed steel (HSS) based drilling
tools, coated with various coating layer (uncoated, TiN and TiCN) on
material AISI D2 tool steel. Two cutting parameters, spindle speed and feed
rate, each at three levels were considered. An L9 array, the signal-to-noise
(S/N) ratio and the analysis of variance (ANOVA) were employed to analyze
the significant and percentage of each parameters for minimum surface
roughness. The results revealed that the drilling tools gave main affects the
surface roughness based on the highest percentage distribution (95%),
followed by the spindle speed (3%) and feed rate (0.4%). Further, the results
of ANOVA indicated that the combination of optimum parameter recorded
as drilling tools HSS-TiCN with spindle speed of 680 rpm and feed rate of
206.25 mm/min.
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