关键词: 主轴热变形, 复向量, 误差分离, 回转精度评定

Abstract:

Considering  that  various  types  of error components were contained in the thermal errors,the  orthogonal method was adopted  herein  to measure  the rotation errors of spindle including radial errors and axial errors  resulted from thermal deformation under various temperature fields.Based on complex vector principle of spindle rotation errors,error separation with  FFT  method was  used to separate the eccentric errors  of  the calibrated artifact and displacement caused by thermal deformation from sampled signals to obtain pure rotation error motion of the rotation axis successfully.So that,the rotation  accuracy of  spindle concerning thermal deformation was evaluated accurately,its analyzed results provide the experimental basis and reference data for the subsequent thermal error compensation.

Key words: thermal , deformation of spindle;complex , vector;error , separation;rotation accuracy evaluation