Evaluation of Dynamic Quality of Machine Tools Using Autocorrelation Functions of Vibroacoustic Oscillations

Assessment of the Machine Dynamic Quality on the Basis of the Integrated Assessment of the Spectrum of Vibroacoustic Vibrations

“…1, show that the minimum value of the integrated assessment of the IC spectrum corresponds to the minimum surface roughness Ra at n = 1600 rpm, and the minimum value of the oscillation index corresponds to the maximum stability margin of the DS. It correlates with the data of [10]. Next, we examine the use of integral estimates on grinding machines for machining the raceways of bearing rings.…”

“…The first option is connected with the formation of integral assessments of the ACF in the form of [10] = ∫ 2 ( ) ,…”

“…This option has been tested to select the appropriate speed of rotation of the workpiece when machining on a precision turning module such as TPARM. Measurement of vibrations in the frequency band up to 4 kHz was carried out using a vibration meter VSHV-003M2, the DN-3 sensor of which was fixed on a magnetic support on the cutter block [9,10]. At the minimum of the integral estimation (1), the spindle rotation frequency was assigned, at which the roughness parameters of the machined surface Ra (about 0.1 µm) and the machining time of the component were minimal.…”

“…The second use of the ACF is based on the calculation of the transfer function of the DS during cutting, and it is assumed that the cutting force forced by the DS is a "white noise" signal [11,12]. Based on this, it was found in [10] that the oscillation index M calculated from the transfer function, on the basis of which the stability margin of the DW is estimated, changes similarly with the change in the integral estimation IA, and can also be used to select the cutting mode.…”