Experimental investigations to optimise step drill geometry for burr minimisation in drilling using regression model. (2nd August 2010)

• Record Type: Journal Article
• Authors: Ramu, Ch.; Mehta, N.K.; Kumar, Pradeep; Murthy, A.G. Shankara
• Is Part Of: International journal of manufacturing technology and management. Volume 21:Number 1/2(2010)
• Page Start: 122
• Page End: 134
• Publication Date: 2010-08-02
• Subjects: drilling -- burrs -- step drill geometry -- thrust force -- torque -- optimisation -- burr minimisation -- burr size -- mild steel -- burr height; Manufacturing processes -- Periodicals; Manufacturing processes -- Automation -- Periodicals; Production management -- Periodicals; 670.427068
• Languages: English
• ISSNs: 1368-2148

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.