Abstract
Based on the online measurement and evaluation technologies of roundness error for precision machine tool spindle, not only the processing quality of spindle component can be evaluated, but also form error and surface roughness of machining workpiece can be forecasted, and then the suitable compensation control methods can be implemented to improve the processing accuracy of workpiece. According to the geometric characteristics of the roundness error, the combinatorial method of mathematical statistics and harmonic wavelet de-noise is proposed to separate the roundness error of the spindle. First, the collected signal by the sensor is filtered by harmonic wavelet de-noise method, and then the roundness error signal is separated by the mathematical statistics method. The simulation analysis shows that the high separating accuracy of roundness error can be obtained even in the case of small sample by the proposed method in the paper.
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