Surface Integrity Of Aluminum Alloy LM6 When Machine With Coated High Speed Steel And Coated Carbide Cutting Tool

Nur Nabilah Farhana, Sulaiman (2013) Surface Integrity Of Aluminum Alloy LM6 When Machine With Coated High Speed Steel And Coated Carbide Cutting Tool. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

In every machining operation, performance and quality of cutting tools are considered essential in order to increase productivity and efficiency when cutting materials. As the increasing demand of productivity in machining industry, the need of high cutting speed, depth of cut and feed rate for material removal are compulsory. As the use of high cutting temperature will eventually causes reduces in tool life as well as impairs the product quality, developments of coated cutting tool are made to improve the weakness of uncoated cutting tool. However, the material itself also contributed to tool wear and wear mechanism of the cutting tool. In this study, material that will be use is Aluminum LM6 alloy. However, most of the previous researches on aluminium LM6 are focusing on turning and casting only which means there are limitation trials regarding milling process. Since millings are among the most versatile and useful tools and also capable to produce various profiles and curved surfaces, the study of aluminum milling is important to determine the right cutting tool, parameter and cutting parameter. Therefore, this study will focus on machinability of LM6 in terms of optimization of cutting tool, tool life, and cutting parameter and surface integrity. The main focus on this study is to investigate the surface integrity when machining Aluminum alloy LM6 using two different types of cutting tool which are coated high speed steel and coated carbide. The outcome is surface finish for coated high speed steel is better compared to coated carbide. The best cutting parameters obtained from the experiment are spindle speed 3000 rpm, feed rate 60 mm/min and radial depth of cut 0.07 mm using coated high speed steel cutting tool. Machining time is inversely proportional to radial depth of cut. Higher machining time was taken as the radial depth of cut decrease. It is concluded that coated high-speed steel is selected as the best cutting tool for machining aluminium LM6 because the price are less expensive and the surface finish is better as compared to coated carbide.

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