Study of nozzle distance and oil flow rate effects on the droplets size of minimum quantity lubrication

Minimum Quantity Lubrication (MQL) machining process has been widely applied to replace the traditional lubrication and cooling method that brings various drawbacks involving environment, human's health manufacturing cost. Although amount of oil being used in MQL is extremely little, mist formed cutting zone still can successfully prolong tool life improve surface quality workpiece. However, size lubricant droplets must be fundamentally investigated clarify lubricating mechanism zone. This paper aimed study delivered by a commercial generator. Experiments were conducted effects vertical nozzle distance flow rate count size. As result, smallest diameter found range between 10 μm - 22 μm. With increasing distance, became larger due dominancy air influences movement droplets. rate, tend merge together, forming multiple The did not significantly change when varying starting from 35 mm 18 mL/h. Finally, control dial adjust using an generator with internal feeding system application handled properly ensure precise