Drilling Titanium Alloy Grade 5 With Best Cutting Conditions For Lower Cutting Forces and Surface Roughness

Ng, Yen Ming (2016) Drilling Titanium Alloy Grade 5 With Best Cutting Conditions For Lower Cutting Forces and Surface Roughness. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Abstract

Nowadays industries desire to obtain parts with better accuracy and good quality in low cost. Therefore, the machining process performance is very important. The factors that used to evaluate the machining process performance are surface roughness, accuracy, tool wear, cutting forces and etc. Besides that, the machining process performance are depending on the cutting condition and cutting tools. Therefore, cutting tool plays an important role in the machining performance. The sudden failure of a cutting tool that used in machining can tends to decrease the productivity, rejection of parts, increase the production costs and consequentially economic losses. This thesis focuses on experimental investigating the best cutting conditions for lower cutting forces and better surface roughness for machining process performances on titanium alloy grade 5 (Ti-6Al-4V) with the effect of cutting fluid application, cutting speed and feed rate. Drilling method was used in this thesis research. The selected cutting tool for the machining were SOMTA HSS with 5% cobalt drill bit with PVD coated (TiAlN). Three different cutting fluid application conditions were used namely: dry, minimal quantity lubrication (MQL) with palm oil and nanofluids. In addition, three different cutting speeds and cutting feeds were 400 rpm, 500 rpm, 600 rpm, 24