Investigation of tool wear and surface roughness when turning titanium alloy (Ti6Al4V) under different cooling and lubrication conditions

摘要

Because of the low efficiency and low machined surface integrity during cutting Ti6Al4V, the turning experiments of Ti6Al4V alloy were carried out with ultra-fine grain coated carbide tools, CNMG120408 under three different cooling and lubrication conditions, namely dry cutting, wet cutting and Minimum Quantity Lubrication (MQL). The influence of cooling and lubrication strategies on tool wear and surface roughness were analyzed. Compared with dry cutting, the rake face wear had little change, while significant difference of the flank face wear had been observed during wet cutting and MQL. As a result of the increase of the degree of chip serration caused by cutting fluid, the fluctuation of cutting force occurred, and then the surface roughness had been influenced.