To find the specific location of the vibration source for the empty running test; Or for all the moving parts that may become the vibration source, the harmonic regenerative equipment harmonic FHA-25C-50-E250-K calculates the interference force frequency of each moving part according to the motion parameters, and compares it with the spectrum diagram of the machine tool in empty operation test to determine the specific position of the vibration source in the machine.



Three, the cause and diagnosis of self-excited vibration



C1) Causes of self-excited vibration Harmonic regenerative equipment harmonic FHA-25C-50-E250-K Theory about self-excited vibration mainly includes the following two kinds:



1) Regenerative chatter This is a self-excited vibration caused by the cutting thickness change effect. The reason for generating regenerative self-excited vibration is that the cutting areas of the machined surface before and after the cutting process overlap; The last turn cutting vibrator lags behind the *** turn cutting vibrator, the harmonic regeneration equipment harmonic FHA-25C-50-E250-K and the phase difference Angle hu. Between 1800 ·



2) Vibration mode catastrophe flutter, which is caused by the mutual catastrophe and correlation between the main vibration modes of the vibration system