OBRABOTKAMETALLOV Vol. 25 No. 1 2023 technology n, rev/min h, mm The area of stable dynamics of the cutting system The area of unstable dynamics of the cutting system Fig. 13. Areas of stable and unstable behavior of the cutting system Fx, kgF Fy, kgF Fz, kgF t, s a) b) c) t, s t, s Fx, kgF Fy, kgF Fz, kgF t, s d) e) f) t, s t, s Fig. 14. Response forces for the option with a processing speed of 1,600 rpm: a – Fx for h = 0.11; b – Fy for h = 0.11; c – Fz for h = 0.11; d – Fx for h = 0.41; e – Fy for h = 0.41; f – Fz for h = 0.41 Conclusions The studies have shown that the first hypothesis put forward in the paper does not adequately reflect the position of A.D. Makarov about the existence of some optimal processing mode, but the second hypothesis generally confirms this position. Indeed, the optimal value of the cutting speed (cutting temperature), when modeling the dynamics of b а с d e f
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