Experimental investigations to optimise step drill geometry for burr minimisation in drilling using regression model

Ch. Ramu, N.K. Mehta, Pradeep Kumar and A.G. Shankara Murthy

International Journal of Manufacturing Technology and Management, 2010, vol. 21, issue 1/2, 122-134

Abstract: This paper aims at optimising step drill geometry, to minimise burr size, in drilling mild steels. The influence of step parameters namely step angle, size and length on burr size were studied. The results reveal that burr size depends not only on thrust force but also on torque. Optimisation results show that to get minimum burr height on the exit side, step diameter should be approximately 75-85% of drill diameter and step length should be about 50% of drill diameter. Empirical equations for thrust force, torque and burr height were also established in terms of step parameters.

Keywords: drilling; burrs; step drill geometry; thrust force; torque; optimisation; burr minimisation; burr size; mild steel; burr height. (search for similar items in EconPapers)
Date: 2010
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