Performance of TiAlN PVD coated carbide tool in machining AISI 4340 with Minimum Quantity Lubrication (MQL) condition

Abstract

There are several ways to assess machinability, viz. forces that are working during machining, the surface roughness of machined part, chip formation, and tool performance. This article aims to observe the machinability from the tool performance perspective when machining with minimum quantity lubrication (MQL). The MQL device can either be time-controlled or temperature-controlled using an Arduino. The machining was carried out on a conventional lathe toward a bar of AISI 4330 using carbide coated insert tools. The experiments were carried out using Taguchi design L9, by the varying depth of cut, coolant composition and method of applying the coolant. Tool performance was evaluated by tool deterioration value. There are four levels of tool deterioration according to its severities after machining. Analysis of variance shows that depth of cut more influence to the tool performance than the coolant application method by 32.69% and 12.82% each, respectively. However, it is proof that MQL with temperature-controlled would contribute to the minimum tool deterioration.