MININMUM QUANTITY LUBRICATION IN DEEP HOLE DRILLING

Tool wear being a natural phenomenon in all machining processes leads to tool failure. There is growing demand in machining process for high productivity with use of high cutting velocity and feed rate. Such machining inherently produces high cutting temperature. The performances of machining operations are changed by use metal cutting fluids because of their lubrication, cooling and chip flushing functions. Cooling lubrication is an essential condition to achieve the economical tool life and the required surface quality in many cases. Cutting fluids have both economic and technological aspects, but environmental concerns have become increasingly important to manufacturing processes Hence it is difficult to reach a total renouncement of the use of the cooling lubricants in metal cutting for environment reasons, while the minimization of cutting fluid will lead to economical benefits by way of saving lubricant costs and work piece/tool/machine cleaning cycle time. Against this background, the concept of Minimum Quantity Lubrication (MQL)or “near dry lubrication” act as an substitute to traditional fluids is an interesting means of addressing the issues of both economical and environmental intrusiveness, by combining the functionality of cooling lubrication and with extremely low consumption of cooling lubrication .Thus, this work proposes to explore the MQL, elimination of, or significant reduction in, cooling lubricants affects on long hole drilling components of a production system. To ensure an efficient process and successful implementation of Minimum Quantity Lubrication. A detailed analysis and adaptation of cutting parameters, cutting tools, machine tools and the production environment is conducted.