抄録
In MQL intermittent cutting of aluminum alloy, it is considered that an interface between tool and chip is directly lubricated with supplied oil under boundary lubrication regime because of relatively low contacting pressure and low temperature rise. In order to investigate effect of roughness on boundary lubrication performance of lubricant oil, frictional experiment and intermittent cutting test were carried out under severe contact condition. From the experimental results, it is found that frictional coefficient became small if using ester type lubricant and tool with rougher surface under boundary lubrication regime. It is suggested that this reduction in friction by ester with rougher tool is brought from oil retention by roughness valley.
