Design and Analysis of Novel High-Pressure Coolant External Turning Tool

Abstract

The heat generation in the machining process at the cutting zone has a negative effect to cutting edge. The research purpose is to increase heat transfer in the cutting zone by applying a high-pressure internal cooling system to an external turning tool DCLNR 2525M12 with hope to increase the tool life, and better surface roughness.The standard design ISO tool DCLNR2525M12 has been modified by adding an internal cooling system. This function has 2 types of coolant holes at different positions. The main hole leads to the rake face to increase heat transfer in the cutting zone at the primary shear zone and secondary shear zone, it also improved the chip breakability. The second hole leads to the flank face to increase heat transfer in the cutting zone of the tertiary shear zone.In this study, the shape of the coolant hole is varied to find out the influence of the different shapes of the coolant hole with the same total area. The shape of the coolant hole contains 5 variations to the rake face and 2 variations to the flank face. The two types of holes are combined to study the experiments into 2 groups. Then the samples are analyzed using ANSYS fluid flow (fluent) to find the best hole's combination to reduce heat in the cutting zone.Based on the results of ANSYS Fluid Flow (Fluent) simulation, found 1 sample reduce temperature more than another samples. The sample is SX, reducing the temperature 97.0ºK at inlet 20 m/s.