抄録
The minimum quantity lubrication (MQL) machining is capable to reduce the machining cost and cutting fluid consumption, while enhancing machining performance. However, the performance of machining with MQL cooling technique to reduce machining temperature is still ineffective. In recent study, machining with supercritical carbon dioxide (SCCO_2) cooling technique has been investigated to effectively reduce the machining temperature and subsequently prolong the tool life. In this paper, the characterization of SCCO_2 has been studied on two different input chamber pressures. Experiments were carried out using an orthogonal cutting process in which the efficiency of different SCCO_2 input chamber pressure was compared to MQL technique with respect to cutting temperature, cutting force and tool-chip contact length. The experimental results showed that the cooling effect of SCCO_2 was more efficient at high input chamber pressure. It reduces the cutting temperature, cutting force, and tool-chip contact length compared to SCCO_2 at low input chamber pressure and MQL machining technique.
