International Journal of Applied Science and Technology

ISSN 2221-0997 (Print), 2221-1004 (Online) 10.30845/ijast

An Investigation in Drilling 1020 Steel Using Minimum Quantity Lubrication
Nourredine Boubekri

 

Abstract
The current trend in the metal-cutting industry is to find ways to completely eliminate or drastically reduce cutting fluid use in most machining operations. Recent advances in tool and machine technology have made it possible to perform some machining without cutting fluid use or with minimum-quantity lubrication (MQL). Drilling takes a key position in the realization of dry or MQL machining. Economical mass machining of common metals (i.e., tool and construction- grade steels) requires knowledge of the work piece characteristics as well as the optimal machining conditions. In this study we investigate the effects of using MQL and flood cooling in drilling 1020 steel using HSS tools with different coatings and geometries. The treatments  for MQL in this study are commonly used by industry under flood cooling for these materials. A full factorial experiment is conducted and regression models for both surface finish and hole size are generated. The results show a definite increase in tool life and better or acceptable surface quality and size of holes drilled when using MQL.

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