DefinePK

Abstract

Titanium alloys found broad applications in aviation, chemical, and automotive sectors because of its lightweight, high-temperature strength, and high corrosion resistance. This research paper investigates the influence of machining variables on the surface roughness of the machined component in finish turning of titanium alloy Ti-6Al-4V. The finish turning experiments conducted on GEEDEE WEILER CNC lathe at different speeds (v), feed (f) and depth of cut (d). Uncoated tungsten carbide insert was used as the cutting tool. Taguchi L9 orthogonal array utilized to perform the experiments. After conducting each test, surface roughness measured using surfcom tester. The optimal machining variables that provide the smaller value of surface roughness is determined based on signal to noise ratio method. Analysis of variance (ANOVA) was accomplished to identify the most affecting machining variable on surface roughness. The experimental result shows that the feed was the most dominant variable that influences the surface roughness. From the ANOVA, the surface roughness in finish turning is strongly influenced by the feed rate followed by speed and depth of cut. The minimum surface roughness was obtained by the following optimal variables via speed 75 m/min, feed rate 0.1 mm/rev and depth of cut 0.25 mm.