Evaluation On Machining Performance Of AISI 1045 Steel Under Dry Condition

Surface integrity and tool wear is important to determine the quality of machine surface in order to achieve optimum cutting parameter. This project was conducted to study the optimum of cutting parameters on tool wear and surface roughness using AISI 1045 steel under dry turning process. The cutting tool that has been selected was coated carbides insert and the size of the AISI 1045 steel is 300 mm X ϕ55 mm. HAAS SL-20 CNC lathe machine was utilized in this project to remove the surface of material. The main controllable turning parameters that have been investigated in this project were cutting speed, feed rate and depth of cut. The machining parameters used in this experiment are cutting speed (150 m/min, 200 m/min and 250 m/min), feed rate (0.05 mm/rev, 0.1 mm/rev and 0.15 mm/rev) and depth of cut (1.0 mm). In this experiment, multilevel factorial design used to get the optimum parameters. Mitutoyo surface roughness tester was used to determine the average of surface roughness. The surface integrity of the workpiece and the tool wear rate of the cutting tool is analyse using the stereo microscope. Analysis was performed using experimental result, graph, and ANOVA. This project has explained the effect of dry machining condition on surface roughness and tool wear of the workpiece. Based on the analysis, the optimum cutting parameter to get the minimum surface roughness was cutting speed (200 m/min), feed rate (0.1 mm/rev) and depth of cut (1.0mm). It shows that the feed rate is the most influence parameter that contributed to the highest effect of surface roughness and followed by the cutting speed and depth of cut