Identification and Measurement of Geometric Errors for a Five-axis Machine Tool with a Tilting Head using a Double Ball-bar
Identification and Measurement of Geometric Errors for a Five-axis Machine Tool with a Tilting Head using a Double Ball-bar
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DOI：
10.1007/s12541-011-0044-5
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发表时间：
2011-04-01
影响因子：
1.9
通讯作者：
Yang, Seung-Han
中科院分区：
文献类型：
--
作者：
Lee, Dong-Mok;Zhu, Zankun;Yang, Seung-Han
几何误差是五轴机床的主要潜在误差源之一。几何误差有两种类型：位置相关的几何误差和位置无关的几何误差。提出了一种利用双球杆实现多轴联动控制的方法来识别和测量可倾转头五轴机床与位置无关的几何误差。其他研究人员已经提出了用于识别与位置无关的几何误差的技术。然而，大多数这些是基于这样的假设，即位置相关的几何误差（如线性位移，直线度和角度误差）被消除的补偿，一旦位置无关的几何误差已被确定。本文提出的方法考虑了位置相关的几何误差的影响。首先定义了位置相关的几何误差。然后进行具有两个或三个同时控制运动的圆测试的路径生成，以测量与位置无关的几何误差。最后，通过仿真和实验验证了该方法的有效性.仿真结果表明，所提出的方法是足够的，以准确地识别位置无关的几何误差。实验结果表明，该方法可用于五轴机床倾斜头位置无关误差的辨识。
Geometric errors are one of the primary potential sources of error in a five-axis machine tool. There are two types of geometric errors: position-dependent geometric errors and position-independent geometric errors. A method is proposed to identifiy and measure the position-independent geometric errors of a five-axis machine tool with a tilting head by means of simultaneous multi-axis controlled movements using a double-ball bar (DBB). Techniques for identifying position-independent geometric errors have been proposed by other researchers. However, most of these are based on the assumption that position-dependent geometric errors (such as linear displacement, straightness, and angular errors) are eliminated by compensation, once the position-independent geometric errors have been identified. The approach suggested in this paper takes into account the effect of position-dependent geometric errors. The position-dependent geometric errors are first defined. Path generation for circle tests with two or three simultaneous control movements is then carried out to measure the position-independent geometric errors. Finally, simulations and experiments are conducted to confirm the validity of the proposed method. The simulation results show that the proposed method is sufficient to accurately identify position-independent geometric errors. The experimental results indicate that the technique can be used to identify the position-independent errors of a five-axis machine tool with a tilting head.