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Analytical Algorithm for Prediction of Stability Lobes in Micromilling
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In this paper, an algorithm was developed for the construction of stability lobe diagram. The algorithm makes use of stiffness, natural frequency and damping coefficient of the system. Stability lobe diagram was constructed for C 0.6 mm end mill. Experiments were conducted on DECKEL MH 6000C 4-axis CMC machine with high speed spindle of 42000 rpm and 2.5 KW spindle and capable of 6 m/min cutting feed on work piece material of aluminum alloy two thousand series (AA 2014) commonly used for aircrafts, structures, engine fuel tanks, trucks frames and wheels. The stability lobe diagram was validated with the surface finish measurement on the machined surface. The surface finish was found to be better at stable speeds.
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