| Rotation axes are core components of the precision numerical control equipments.As a comprehensive rotary performance,the rotation error and vibration not only greatly affects the machining accuracy,but also determines the dynamic performance of the machine in a large extent.In this paper,the non-contact sensing technology is used to detect the spindle rotation error and vibration,and the comprehensive detection system of the spindle rotation performance is developed.A comprehensive detection system with high precision and wide range is designed and developed.Comprehensive tests are carried out to prove the reliability and stability of the system.The main contents and achievements are as follows:(1)A multi-section comprehensive detection scheme of spindle rotation performance is proposed.For the purpose of detecting the spindle rotation error and vibration at the same time,a multi-section comprehensive detection program is designed.Based on the analysis of commonly used rotary error detection methods and vibration detection methods,a method of detecting the rotation performance of spindle based on displacement sensor is proposed.(2)According to the comprehensive detection program of rotation performance,the signal separation and analysis methods are described.Firstly,the advantages and disadvantages of the separation methods of shape error are compared.The three-point method is used to separate the shape error,and then the vibration signal and the rotation error signal are separated by wavelet analysis method.After the signal is separated,the rotation error is evaluated by the least square circle method,and the vibration signal is analyzed in time domain and frequency domain.(3)A multi-section comprehensive detection system for testing spindle rotation performance is developed.The overall structure of the comprehensive detection system is designed,the signal acquisition devices are chosen and the hardware device of the detection system is built.The function of the detection system’s software is modularized and programmed by VC ++ and MATLAB.(4)The comprehensive detection system is validated by experiments.After the system development is completed,the stability and reliability of the detection system are experimented.In addition,compared with experiments using other methods,the test results verify the effectiveness of the system signal separation.The existing problems of the comprehensive testing system are analyzed,and the improvement measures are put forward. |
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