| Summary: | Background. Application of stability margin of dynamic system, integral estimates
of autocorrelation functions and spectra of vibro-acoustic oscillations in machine
tools is relevant for evaluation of their dynamic quality and purpose of cutting mode, which is theoretically justified by solution of stochastic equation of oscillations in “cutter-detail”
system. Materials and methods. An experimental-analytical method is used to substantiate
the use of functionals from autocorrelation functions and spectra of vibration-acoustic oscillations
in machines to select a rational cutting mode and determine the initial phase of critical
tool wear. Results. Results of experimental studies on turning and grinding machines on
evaluation of their dynamic quality at various modes of machining and wear of cutter are
presented. Conclusions. The results of studies of the stochastic characteristics of oscillations
of a dynamic system showed the feasibility of assessing the dynamic quality of automated
machine tools. This allows to compare by parameters, to choose a technological
mode for processing high-precision parts with a given quality, and to identify the initial
phase of catastrophic cutter wear for timely replacement and better use of the resource.
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