Abstract:
This paper presents a statistical analysis of
process parameters for surface roughness in drilling of
Al/Al2O3p metal matrix composite. The experimental
studies were conducted under varying spindle speed,
feed rate, point angle of drill. The settings of drilling parameters
were determined by using Taguchi experimental
design method. The level of importance of the drilling parameters
is determined by using analysis of variance. The
optimum drilling parameter combination was obtained by
using the analysis of signal-to-noise ratio. Through statistical
analysis of response variables and signal-to-noise
ratios, the determined significant factors are depth of cut
and drill point angle with the contributions of 87% and
12% respectively, whereas the cutting speed is insignificant
contributing by 1% only. Confirmation tests verified
that the selected optimal combination of process parameter
through Taguchi design was able to achieve desired
surface roughness.
