Comparison of material removal rate of AA2014 aluminum alloy using HSS M42 and Titanium Nitride coated drill tools

Abstract

This research study focuses on the comparison of material removal rate (MRR) of two tools, HSS M42 and TiN Coated twist drill bits to find out the tool with maximum Material Removal Rate. Tool materials used in this research are HSS M42 tool and Titanium Nitride Coated tool as drill bits. Aluminium alloy AA2014 material is used as a specimen on which the drilling operation is done. Two groups with 20 specimens each are equally divided to measure the MRR of both the tools using CNC drilling operation. Spindle speed, feed and depth of cut were controlled factors. The observed results for each tool were recorded and analysed using SPSS software. Final Experimental MRR was investigated and found the final Mean MRR obtained for HSS M42 was 277.476 with a standard deviation of 37.4548. And the Mean MRR obtained for the TiN coated tool was 364.9031 with a standard deviation of 23.452. These values were obtained with a significance level of 0.035 which is less than 0.05. This research study shows that the TiN Coated drill bit has comparatively higher MRR than the HSS M42 drill bit in CNC Machining under dry drilling conditions.