Experimental Study on Unbalanced Vibration Signal of High Speed Spindle Based on All Phase Fast Fourier Transform

The spindle system will vibrate due to mass unbalance during high speed operation, which will affect the machining accuracy. In order to compensate the dynamic balance quality of unbalanced vibration, spindle dynamic balance processing can be carried out. In the process of dynamic balance processing, the extraction of unbalanced vibration signal is the key to affect the balance quality. The vibration signal extraction experiment of high-speed spindle was carried out by using all-phase FFT method. The vibration signal extracted by the all-phase FFT method is taken as the input of the influence coefficient method, and the amplitude of vibration is obviously reduced, and the balance precision reaches 65.21%. Compared with the cross-correlation method, the unbalanced vibration is effectively suppressed. The results show that the all-phase FFT method has the characteristics of stability and high balance precision, and can be applied to the vibration signal extraction of high-speed spindle and the vibration signal extraction of rotary subclass.