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基于多体系统理论的数控机床加工精度几何误差预测模型
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江苏省科技厅产学联合创新项目(BY2012173)


Geometric Error Prediction Model for Machining Accuracy of Machine Tools Based on Multibody System Theory
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    摘要:

    针对多轴联动数控机床加工精度误差补偿问题,从分析数控机床误差产生机制和建立精度误差补偿模型的角度,提出基于多体系统理论的数控机床加工精度几何误差预测模型。分析B-A摆头五轴龙门数控机床的拓扑结构关系、低序体阵列、各典型体坐标变换,推导出B-A摆头五轴龙门数控机床的精度几何误差预测函数模型。采用平动轴十二线法误差参数辨识算法,计算出B-A摆头五轴数控机床21项空间几何误差,为精度几何误差预测函数提供有效的误差参数。该精度误差参数建模方法,对不同结构和运动关系的数控机床具有通用性,为后续数控机床误差动态实时补偿提高切削加工精度提供了理论基础。

    Abstract:

    As for the problem that machining accuracy compensation of multiaxis CNC machine tools, it was proposed that the method of CNC machine tools machining accuracy geometric error prediction model based on multibody system theory, from the point of view that the analysis of CNC machine tools error generation mechanism and building precision error compensation model. Topological relationship, the loworder body arrays and coordinate transformation of typical body of the B-A pendulum angles gantry CNC machine tools were researched. The precision error prediction function of the B-A pendulum angles gantry CNC machine tools was deduced. 21 space geometry errors of the CNC machine tools were calculated by using 12 lines error identification algorithm of motion axis. Effective error parameters could be offered for the precision error prediction function. The method of building precision error is versatile for CNC machine tools with different structures and movement relationship and offers theoretical basis for error dynamic realtime compensation of CNC machine tools and enhancing machining precision.

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王开德,张欣,韩凯凯,王洪乐.基于多体系统理论的数控机床加工精度几何误差预测模型[J].机床与液压,2018,46(17):109-113.
. Geometric Error Prediction Model for Machining Accuracy of Machine Tools Based on Multibody System Theory[J]. Machine Tool & Hydraulics,2018,46(17):109-113

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  • 在线发布日期: 2019-07-09
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