零部件数控机床加工精度综合误差模型构建研究

Research on the Establishment of Comprehensive Error Model for Machining Accuracy of CNC Machine Tools

提出一种基于综合误差模型的零部件精度加工控制方法,对机械加工的误差来源进行分析。以高精度五轴加工机床为例,构建参考坐标系、相对坐标系和齐次坐标,并通过齐次变换,建立不同部件的运动关系和误差关系,通过推导求解得到综合误差。以实际的零部件加工为例,对以上的方案进行仿真验证,仿真结果与实际加工测量结果大致相同,为高精度零部件加工提供借鉴。

This paper proposes a method based on integrated error model to control the accuracy of parts. The source of error in machining is analyzed. Taking the high-precision five-axis machining machine as an example, the reference coordinate system, the relative coordinate system and the homogeneous coordinates are constructed, and the motion relationship and error relationship of different components are established by homogeneous transformation. The comprehensive error is obtained by deriving the solution. Taking the actual parts processing as an example, the above schemes are simulated and verified, and the simulation results are consistent with the actual machining measurement results, which provides a reference for high-precision parts processing.