| Abstrakt: |
The goal of this study is to examine the surface roughness of AA6061 material after drilling with HSS M42 and CrN coated tools in CNC machining, as well as to determine the influence of a novel tool coating with Chromium Nitride coated tool. The specimen material was AA6061 aluminium alloy, and the cutting tools were HSS M42 and CrN coated drill bits. For a better comparison of surface roughness, 40 specimens were manufactured and evenly divided into two groups; for every tool, 20 specimens were allocated and machined. G power 80% used for sample size calculation. HSS M42 had a mean surface roughness of 11.32620 and a standard deviation of 4.581115. The mean surface roughness of a Chromium Nitride coated drill bit was 7.98325, with a standard deviation of 3.084193. This study's significance value was 0.010 (p<0.05), which is less than 5% level of significance. Using SPSS statistical software, the results of the surface roughness test's 'Ra' value were statistically examined. Within the limitations of this study, a CrN coated tool lowers surface roughness significantly when compared to an HSS M42 drill bit under dry machining conditions in the CNC machine. [ABSTRACT FROM AUTHOR] |
