Optimization on Delamination of Cutting Parameter during Drilling on Gfrp Plastics Based on Taguchi Method

Drilling of glass fibre reinforced plastic (GFRP) composite is different from metallic materials due to its mechanical properties. The drilling of this material may generate delamination of drilled holes on workpiece. The purpose of this paper is to investigate the influence of the cutting parameters, such as cutting speed and feed rate, point angle of drill and material thickness on delamination produced when drilling a GFRP composite. The damage generated associated with drilling GFRP composites were observed, both at the entrance and the exit during the drilling. Hence it is essential to obtain optimum cutting parameters minimizing delamination at drilling of GFRP composites. This paper presents the application of Taguchi method for minimization of delamination influenced by drilling parameters and drill point angle and material thickness. The optimum drilling parameter combination was obtained by using the analysis of signal-to-noise ratio. The conclusion revealed that the feed rate, cutting speed, point angle and thickness are the most influential factor on the delamination, respectively.