Investigations on the surface roughness of drilled hole on carbon fiber reinforced plastic composite

The present work aims to analyze the drilling parameters namely speed, feed and point angle for surface roughness of drilled hole on carbon fiber reinforced plastic (CFRP) composite. Three factors, three levels, Box Behnken design matrix is deployed to minimize number of experiments. Response Surface Method is adopted to develop mathematical model. The adequacy of the developed model is checked by using Analysis of Variance method technique. By using the developed mathematical model, surface roughness of the drilled CFRP composites are predicted with 95% confidence level. The influence of parameters on surface roughness is predicted from main effects plot and interaction effect plot and optimum parameters for minimum surface roughness are presented.