Özet:

Aluminium and its alloys having properties such as lightness, strength and easy formability has ever increasing usage area in industry.  Importance and usage areas of 7075, 6061 and 2024 quality Al alloy in defense and aviation industry increases rapidly Determination of optimum values in surface roughness and cutting tools wear behaviours in machining of 7075, 6061 and 2024 aluminum alloy is aimed in this study.  For this purpose, machining tests on 7075, 6061 and 2024 aluminum alloy was performed to CNC lathe. These tests were performed by choosing constant cutting depths (2.5 mm), four different cutting speeds (200, 250, 325, 400 m/min) and three different feed rate values (0.250-0.325-0.400 mm/rev). Carbide cutting tools suitable for machining aluminum was used in tests. In tests, roughness values of machined surfaces were measured and wear behaviours of cutting tools were examined. The test results were compared among the three different aluminum alloys. Finally, comparison will be made by interpreting values that are obtained according to different machining parameters and optimum machining parameters were determined. Large increase in surface roughness corresponds to the slight increase in feed rate has occurred. Appreciable wear mechanisms were not happened in cutting tools.

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