Page 9 - january

PRODUCTION AUTOMATION

At present, the most widespread are DS, the basis of which is information-measuring
systems of power and vibroacoustic parameters. Measuring devices that register forces arising
during cutting can be divided into two classes: electromechanical (dynamometers) and based
on electromagnetic effects in an electric drive (current and voltage sensors). Despite the fact
that dynamometers have a high measurement accuracy and a wide frequency range, they are
not widely used in production and are a tool for scientific research. This is due to their high
cost, influence on the rigidity of the technological system, and a decrease in the versatility of
the machine [8].
Measuring devices that use electromagnetic effects in an electric drive using current and
voltage sensors, on the contrary, are much cheaper and easier to operate and are widely used
in industry when organizing the so-called "adaptive control".
The nature of vibroacoustic (VA) signals during cutting and friction in a wide frequency
range has a complex structure that does not coincide with the nature of forces during cutting. For
example, [9], with an increase in the contact area during friction, the amplitude of oscillations
at some stages can increase sharply, and at some stages, it can fall or not change at all.
The complex nature of the VA signal is compensated by its sensitivity to changes in contact
processes during cutting and friction and the "long-range" VA signals [10].

Stanochniy park 9