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中文摘要：
研究车铣复合数控机床存在的几何误差问题。根据车铣复合数控加工中心的结构特点，以多体系统运动学理论为基础，采用低序体阵列描述车铣复合加工中心的拓扑结构，分别建立了车铣复合数控机床的车削模式和铣削模式的精密加工方程，并设计误差补偿软件和进行仿真试验。实验结果表明：运用多体系统运动学理论建立的车铣复合数控加工中心几何运动误差模型是正确的；软件误差补偿提高了车铣复合数控加工中心的加工精度，效果明显。
英文摘要：
The geometric error problem existing in turning＆milling composite NC machine tool was researched. According to the structure characteristics of turning＆milling composite NC processing center, based on the multi-body system theory, the low-order body arrays were used to describe the topological structure of turning＆milling composite NC processing center. A precision process equation of turning mode and a precision process equation of milling mode were built, and simulation was made for software compensa- tion. The experimental results show that the geometry motion error model of turning＆milling composite NC machine tool is correct, and the software error compensation improves machining accuracy of turning＆milling composite NC machine tool.
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