Experimental Studies on Hole Quality in Drilling of SA182 Steel

In any manufacturing industry, defects minimization is the prime condition for reducing the production cost and improving the quality. In this research, the experimental studies on hole quality characteristics in drilling of SA182 steel with HSS drill has been presented. The study primarily focuses on investigating the effects of machining parameters such as cutting speed, feed rate and point angle on thrust force, specific cutting coefficient, surface roughness and circularity error in drilling of SA182 work material. The experiments were planned as per Taguchi’s orthogonal array and response surface methodology (RSM) has been employed to analyze the machinability and hole quality characteristics. Analysis of variance (ANOVA) was used to check the adequacy of the models for the required responses. Response surface analysis obviously reveals that thrust force, specific cutting coefficient and surface roughness decrease with the increase in cutting speed, whereas the circularity error increases with increased cutting speed and feed. Higher point angle is desirable for minimal surface roughness and circularity error.