Multi-Point Injection Minimum Quantity Lubrication Machining

This paper presents a study on minimum quantity lubrication wherein the metal working fluid is injected individually at multiple points in cutting zone, namely, rake face, back of chip and at flank face. A special attachment is developed for injecting aerosol at all possible combinations of one, two, or three forgoing points of injection. A case study on machining of Ti-6Al-4V showing effect of injection schemes on cutting force and surface roughness is presented. Comparison of multi-point injection with dry and flood cooling indicates reduction in cutting force and surface roughness while using different combinations of fluid injection