四轴联动加工中心误差补偿技术的研究

The Study of Error Compensation Technology for 4-axis NC Machine Tool

基于多体系统理论建立了四轴联动加工中心的运动误差模型 ,提出几何误差参数的辨识方法以及相应的测量技术 ,运用传统的测量方法与先进的 Renishaw测量系统相结合 ,可准确地辨识出四轴联动加工中心的 2 7项误差参数 ;在四轴联动加工中心上进行软件误差补偿实验 ,用三坐标测量机进行检验。结果表明 ,建模方法具有较强的实用性 。

Based on the theory of multibody system, the model of kinematic error,the method of geometrical error parameter identification and measuring technique were developed. Using the traditional measurements and Renishaw measuring system,27 geometrical error parameters of 4-axis machining center were exactly identified. The error software compensation experiments were carried out in MAKINO machining center, and the parameters were verified in CMM. Experimental results show that the modeling method is generalized, the compensation method is powerful, efficient and the error compensation results are apparent.