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首页> 外文期刊>International Journal of Precision Engineering and Manufacturing >The Method of Geometric Error Measurement of NC Machine Tool Based on the Principle of Space Vector's Direction Measurement
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The Method of Geometric Error Measurement of NC Machine Tool Based on the Principle of Space Vector's Direction Measurement

机译：基于空间向量方向测量原理的NC机床几何误差测量方法

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摘要

To achieve the quick and accurate calibration of the geometric errors of NC machine tool, a new method with laser tracker on the basis of space vector's direction measurement principle is proposed in the paper. A series of measuring points are mounted on the moving part of the machine tool, and then adjacent measuring points are connected to form a space vector respectively. Due to the motion error of the machine tool, the direction of the vectors composed will be changed. Meanwhile, the deviation of vector's direction only relates to angular displacement error rather than linear displacement error. Based on the characteristic, the change of vectors' direction is measured by laser tracker based on the multi-station and time-sharing measurement during the motion of machine tool, and then the angular displacement errors and linear displacement errors of each axis can be accurately identified successively, which reduces the complexity of error identification. By establishing the mathematical model of geometric error measurement of machine tool based on the principle of space vector's direction measurement, the base station calibration algorithm by measuring the motion of the designed precise turntable, the measuring point determination algorithm and geometric error separation algorithm are derived respectively, and the accuracy of these algorithms are verified by simulations. In addition, the results of the experiments show the feasibility of the proposed method.
机译：为了实现NC机床的几何误差的快速准确校准，在纸上提出了一种基于空间向量方向测量原理的激光跟踪器的新方法。一系列测量点安装在机床的移动部分上，然后连接相邻的测量点以分别形成空间向量。由于机床的运动误差，将改变组成的矢量方向。同时，向量方向的偏差仅涉及角位移误差而不是线性位移误差。基于特性，通过基于机床运动期间的多站点和时间共享测量来测量矢量方向的变化，然后可以精确地完成每个轴的角位移误差和线性位移误差连续识别，减少了错误识别的复杂性。通过基于空间向量的方向测量的原理建立机床几何误差测量的数学模型，通过测量设计精确转盘的运动，测量点确定算法和几何误差分离算法的基站校准算法得出并且通过仿真验证了这些算法的准确性。此外，实验结果表明了该方法的可行性。

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