Experimental Investigation to Optimize Process Parameters in Drilling Operation for Composite Materials

Abstract

This paper discusses the influence of cutting parameters in drilling of carbon fiber reinforced composites. The experiments are conducted to study the effect of point angle, spindle speed and feed rate on cutting force using HSS twist drills. This paper presents a mathematical model for correlating the interactions of drilling parameters and their effects on cutting forces. The optimum value of cutting parameters is also determined to get minimum value of cutting forces. Diameter of drilling cutting tool is 12mm, 8mm. theoretical calculations are done to calculate thrust force and torque. The assembly of work piece and tool are modeled in Pro/Engineer. The input parameters considered are point angle 118⁰ and 120⁰, tool diameter, spindle speed, feed rate and materials. Different combinations of the above parameters are considered to get the minimum value of cutting forces. Structural analysis is done on the assembly to verify the stresses for different materials Mild Steel, Aluminum alloy and carbon fiber reinforced composites.