Optimization of process parameters in drilling of fibre hybrid composite using Taguchi and grey relational analysis

Nowadays quality plays a vital role in all the products. Hence, the development in
manufacturing process focuses on the fabrication of composite with high dimensional accuracy
and also incurring low manufacturing cost. In this work, an investigation on machining
parameters has been performed on jute-flax hybrid composite. Here, the two important
responses characteristics like surface roughness and material removal rate are optimized by
employing 3 machining input parameters. The input variables considered are drill bit diameter,
spindle speed and feed rate. Machining is done on CNC vertical drilling machine at different
levels of drilling parameters. Taguchi’s L16 orthogonal array is used for optimizing individual
tool parameters. Analysis Of Variance is used to find the significance of individual parameters.
The simultaneous optimization of the process parameters is done by grey relational analysis.
The results of this investigation shows that, spindle speed and drill bit diameter have most
effect on material removal rate and surface roughness followed by feed rate.