The main feature of nc machine tool spindle box axis slightly bent

Nc machine tool main box axis slightly curved, will cause tooth profile in gear transmission error, formed by meshing frequency and the frequency doubling as the carrier frequency, to gear in the shaft to turn the frequency modulation frequency of meshing frequency modulation phenomenon, if there is more on the bending of the crankshaft to the gear mesh, will appear more meshing frequency modulation. But general spectra with above quantity is little and thin, it sideband, similar to that of the tooth profile error is but its axial vibration energy increase obviously. The main characteristic of dalian machine tool plant will bend axis mild boils down to:

1, the gear mesh frequency and its harmonics as carrier frequency, the gear in the shaft to turn the frequency and frequency doubling modulation by meshing frequency modulation frequency, modulation sideband quantity is little and thin, demodulation spectrum only commonly appear in shaft turn frequency;

2, if there is more on the bending of the crankshaft of gear meshing, will appear more of meshing frequency modulation;

3, a certain degree of vibration energy increases;

4, envelope energy has a certain degree of increase.