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영어

In this paper, a new online method is proposed to measure and identify the spindle thermal error of the machining center. The method is firstly established by a comprehensive error identification model including geometric and thermal error. Then the multi-viewpoint modeling method based on stereo vision is adopted to obtain the solution of thermal deformation error without the influence of geometric error. A software is developed to online inspect and compensate the thermal error of machining center. The software is consisted by four modules, measurement module, error identification module, error compensation module and analysis module. It can not only be able to quickly identify the thermal error detection, but also can accurately predict thermal error, and effectively improve the machining accuracy. Finally, the experiment results show that the thermal error values of the machining center can be measured accurately and identified online quickly by the proposed software method.