Determining the coefficient in the Taylor formula when processing aluminium alloy [AlSi5Zn4Cu] using tin-coated knife on CNC lathe
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The paper studies the determination of coefficients in the basic and extended Taylor formula. Experimental design, cutting conditions with cutting speed V= 300÷400 (m/min); feed rate S= 0.1÷0.3 (mm/rev); and depth of cut t= 0.3÷0.7 (mm). The type B mixed planning method is selected, conducting 8 experiments at the center, 6 experiments at star points, and repeating each experiment 4 times. Experiments are performed on a MASCUT AC1840 CNC lathe, surface roughness is checked using an SJ-301 machine. When the surface roughness Ra value reaches 2.5÷0.63 (μm), the experiment stops, and the corresponding tool life T (minutes) is recorded. Experimental results show the relationship between cutting factors (S, V, t) and tool life (T). From there, construct the coefficients (n, C) and (n, a, b and Ct) in the basic and extended Taylor formula.
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