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Surface roughness was measured on CNC-drilled Aluminum Alloy AA1100 using both HSS M35 and TiN-coated tools. HSS M35 twist drills and Titanium Nitride drills are used in this study. Holes are cut into certain AA1100 aluminium. In this study, both control and experimental groups are used. Drill bits coated with TiN and controls made from HSS M35 will be used in this experiment. Twenty samples from each group were deemed sufficient for analysis using an A G power calculator. Twenty samples from each tool are drilled in a controlled experiment. Speed, feed rate, and cutting depth dials. The parameters used were 2200 RPM, 200 IPM, and 10 mm of depth of cut. Using a Mitutoyo Surface tester SJ-410, we measured the surface roughness of 20 samples and analysed the data using SPSS with a 95% confidence interval. HSS M35 drill bits had a value of 2.89445, whereas the TiN-coated drill bits had a value of 0.95726. Findings are statistically significant (p=0.024) in this study. The surface roughness of the TiN-coated tool was better than that of the HSS M35 tool at the same input speed, feed, and depth of cut. [ABSTRACT FROM AUTHOR]

This experimental study's goal is to evaluate and contrast the drilled hole surface roughness of AA5182 material that has been processed following drilling operations utilising HSS drill tools and M35 twist drill tools in a cutting-edge CNC vertical machining centre with & without lubricant. Aluminium Alloy 5182 containing 4.5% of magnesium as alloy is used as base material to perform CNC drilling operation using HSS drill tool and M35 twist drill bits of 10mm drill bit diameter and 118° drill bit nose angle. In this work, drill bits are compared for drilling operations of 10 mm depth with constant cutting speed of 2200 rpm and cutting feed of 180 mm/min as input variables programmed in novel CNC vertical machining center without lubricant as dry drilling operation. For each drill bit, 20 samples of AA5182 drilled holes surface roughness were measured in MitutoyoSurftest SJ-410 equipment. Sample size is calculated using GPower with 95% confidence interval and threshold value of 0.05. On comparing the surface roughness measured, mean value of HSS drill tool and M35 drill tools were 0.824 and 0.308 respectively. Between two groups there is a significant difference in variance with a value of 0.002 (p<0.05). On comparing the surface roughness of M35 and HSS drill bit over workpiece AA5182 within the limits of input parameter and machining conditions, twist drill bit M35 resulted in better surface quality than HSS drill bit. [ABSTRACT FROM AUTHOR]

The main aim of the goal in this study is to examine the surface roughness of HSS M35 and CrN coated tools in drilling operation of Aluminium Alloy AA6351-T6 material in order to reduce the surface roughness. HSS M35 and CrN coated twist drill bits were utilised in this experiment. Aluminium Alloy AA6351-T6 is the specimen on which the drilling operation is performed. There are two sets of 20 specimens in this study. Drilling operations were carried out using both drill bits. Variables that can be controlled included speed (rpm), depth of cut (mm) and feed rate (mm3/rev). 2200,200 and 10 were the input speed, feed and depth of cut respectively. The surface roughness values of each specimen were recorded and analyzed using SPSS software. The mean value for HSS M35 was 2.88970 with a standard deviation of 0.089856, while mean value for CrN was 1.181405 with standard deviation of 0.117861. The significance value for this study was 0.048 which is less than the P<0.05. Within the limitations of this study, surface roughness values are found to be lower in the CrN coated tool than the HSS M35 tool in this investigation for the speed, feed rate and depth of cut. [ABSTRACT FROM AUTHOR]