METHOD OF VIBRATION DIAGNOSTICS OF MACHINE RESILIENT SYSTEM WITH APPLICATION OF POWER IMPACT GENERATOR INCLUDED INTO 'MACHINE-ACCESSORY-TOOL-PART' SYSTEM

摘要

FIELD: measurement equipment.;SUBSTANCE: invention is designed for diagnostics of a resilient system in metal-cutting machines. The method of vibration diagnostics of the resilient system of the machine using a power impact generator, included into the "machine-accessory-tool-part" system, consisting in the fact that harmonic, pulse or random excitation is arranged at the inlet in the resilient system of the machine, and system response at the outlet is measured, at the same time to produce dynamic characteristics, they excite the investigated structure with the help of the measured dynamic force, differing by the fact that harmonic and random excitation is provided with the help of a piezoceramic contact vibrator, and to create pulse power impact, a generator is used, afterwards signals are supplied to a two-channel spectrum analyser, in which they produce, with the help of spectral analysis of complex signals, based on quick Fourier transform, frequency characteristics, and analogue signals arriving to the analyser inlets are filtered, selected and converted with the help of an analogue-to-digital converter into a digital form for production of series of digital data - implementation, and by speed of selection and duration of implementation they determine the frequency range and the resolving capacity during analysis of investigated characteristics, and the force supplied to the investigated object during turning of the mandrel with the cutter is measured with the help of a piezoelectric dynamometer.;EFFECT: increased accuracy of measurements, as well as expansion of technological capabilities during diagnostics of a resilient system of a machine.;2 cl, 5 dwg