基于12线法的数控机床几何误差测量辨识研究

Study on the measurement and identification of geometric error for the NC machine tools based on the twelve-line method

数控机床几何误差参数辨识是实现数控机床误差补偿的关键技术,而实现误差补偿的前提是通过几何误差参数辨识为空间误差模型准确提供数控机床的21项几何误差参数.现有数控机床几何误差参数辨识方法在测量效率和辨识精度等方面均存在一定不足.基于多体系统误差分析理论研究了12线数控机床几何误差参数辨识方法,并对该方法的数学建模和实验进行了分析.

Geometric error parameter identification of NC machine tools is the key technology for error compensation.The 21 accurate geometric error parameters for space error model are the premise for error compensation,but certain limitation still exists in testing efficiency and identifying accuracy.Based on the precision analysis theory of kinematics for multi-body system（MBS）,this paper introduces the twelve-line method of parameter identification of geometric error,and analyzes its model and experiment.