Abstract
Based on the theory of multi-body system and homogeneous coordinate transformation, this paper analyses the error of five-axis CNC machine tool and establishes the machining precision model firstly. Then taking the five-axis double wall CNC machine tools as an example and according to the structure of the machine and the assembly relationship of key parts, the geometric errors of the machine tools are analyzed. Meanwhile, the coordinate systems of all the key components and characteristic matrix among the bodies are established. Finally, the Machining Accuracy Model of Machine Tool was established. It lays the foundation for the accuracy of subsequent design work.
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