Optimization of roundness in plasma arc drilling process by Taguchi approach

Abstract Plasma Arc Drilling (PAD) is well known non-conventional process extensively used to assemble the complex part profiles for different materials. The dimensional accuracy and surface quality like roundness, kerf tape, and heat-affected zone of PAD are precarious factors for specific applications, especially in aerospace and manufacturing industries. In present investigation has studied the influence of plasma arc drilling parameters for evaluating the quality characteristics of roundness on Ti–6Al–4 V alloy. The experimental runs were designed by the Taguchi method. The optimal PAD parameters such as arc current of 160 amp, speed of 1500 m/min, and stand-off distance of 1 mm are determined. The confirm test exhibits better agreement with the predicted values.