Publications

Abstract : This work proposes the investigation on surface roughness of machining INCONEL 718 by using titanium and carbide tools. The INCONEL 718 is a nickel based super alloy widely used in aerospace and marine industries due to its excellent mechanical property and corrosive resistance characteristics. The metal removing process on this super alloy is always challenging one due to work hardening. Tool geometry, tool material and machining conditions are the main factors which affects the quality of machining. Hence in this work, two different tools inserts of Titanium (DNMG 15-06-04) and Carbide (TNMG 15-06-04) are used for machining. These two tools are having different angles of approach to the work piece and have its own significance in quality of machining. The machining is carried out in CNC Lathe heavy duty SPRINT -16 TC to find the best operating conditions. There are 9 experiments based on Taguchi’s L9 orthogonal array are performed. The machining parameters are Spindle Speed, Feed and Depth of cut and the output response is surface roughness. The predication models are developed using ANOVA. To find the optimal value of the regression model, MATLAB tool box GA is used. The result indicated that predicted models are significant. The test result indicated that for low speed application Titanium tools are preferred and high speed applications Carbide tools are ideal.