Process Oriented Choice of Lubricant Pressure and Volume Flow to Increase Machining Process Efficiency

In machining processes, the choice of a suitable pressure and thus volume flow of lubricant supply in drilling is rather performed with respect to process stability than energy efficiency leading to energetically inefficient processes.In this paper, results regarding the cooling and resource efficiency of lubricant supply in a drilling process of TiAl6V4 are presented. The main principle is to calculate the evacuated heat energy from the cutting zone based on a calorimetrical approach. The pressure as well as the lubricant supply channel diameter have been varied. For these efficiency calculations, the cutting energy, the heat energy evacuated by the lubricant as well as the hydraulic energy were considered. The wear development as well as the chip evacuation were additionally investigated. Based on these investigations, it is shown that high pressure and volume flow lead to reduced tool wear, but not necessarily increase energy efficiency.