Abstract
This paper carried out MQL end milling of an aluminum alloy and investigated the effects of humidified air and lubricants prepared by oxygen-including compounds on the cutting performance. As a result, humid air supply demonstrated the better cutting performance than dry air supply. Among the lubricant esters, an ester with lower kinetic viscosity showed the superior cutting performance probably because of the smaller heat of evaporation and had the advantage in easier vapor lubrication. On the other hand, the lubricating ability of alcohols was found to be greatly influenced by their molecular structures rather than kinetic viscosity.
