Silesian University of Technology, Gliwice, Poland

Abstract

An efficient MQL system (Minimal Quantity Lubrification) ensures the proper cooling of the various moving parts, resulting in the cutting process on the machine tools. The introduction of MQL systems responds to the growing demand in the industry with a whole host of real benefits. The geometry of the nozzle influences the flow parameters of the coolant; these parameters can also be influenced by the nature of the fluid or liquids used. The nozzle of the cooling system has a convergent-divergent geometry, the dispersion of the fluid in the areas to be processed being better. A high temperature in the working area above a certain critical value can be harmful to the quality of the surface and can have some negative influences on the life of the cutting tool. MQL-type cooling systems combine different cooling fluids to achieve better cooling and lubrication of the cutting area. Following the simulations performed, the coolant speeds depend on the length of the analyzed nozzle, we can see that the speed has a lower value in the initial section of the nozzle which increases at the nozzle outlet. After exiting the convergence-divergence nozzle, the fluid jet velocity decreases in proportion to the fluid jet length, the simulation of these phenomena can optimize the geometry for the chosen purpose. The present paper aims to analyze the types of coolants and their correct choice, temperature control resulting from the cutting process is achieved due to the correct distribution of cooling fluids in the processing area, optimization can be achieved through computer simulation.