Page 22 - Апрель

METALWORKING EQUIPMENT AND TOOLS

consumed by the drives on the machine. However, in finishing modes, the method does not
always give satisfactory accuracy. This is especially noticeable in finishing with a large ratio of
the power of the applied motor and the power consumed for cutting [11, 15]. This situation is
typical of machining centers, where both roughing and finishing are carried out on parts from
different materials and different configurations.

Fig. 3. Change in the values of Kf and qf with varying cutting speed when turning alloy KhN77TYuR.

Temperature control in the cutting zone is challenging, even in a laboratory setting. The
relationship between the vibroacoustic (VA) activity of the cutting process and the wear of the
cutting tool is widely noted in the technical literature [12 - 15]. VA signals are relatively easy
to control using accelerometers, but the disadvantages of VA diagnostics methods include the
difficulty of separating useful information from the set of parameters of VA signals accompanying
cutting. The simplest parameters of VA signals, which are easy to obtain in digital or analog
form directly during cutting, are the effective amplitudes in the selected frequency ranges.
Observing the change in the effective amplitudes of the VA signal in different frequency ranges,
it is possible to estimate not only the change in the VA activity of the process, but also the

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