Graphical presentation of error motions of rotary axes on a five-axis machine tool by static R-test with separating the influence of squareness errors of linear axes
Graphical presentation of error motions of rotary axes on a five-axis machine tool by static R-test with separating the influence of squareness errors of linear axes
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DOI：
10.1016/j.ijmachtools.2012.03.004
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发表时间：
2012-08
影响因子：
14
通讯作者：
Cefu Hong;S. Ibaraki;Chiaki Oyama
中科院分区：
文献类型：
--
作者：
Cefu Hong;S. Ibaraki;Chiaki Oyama
本文提出了一种利用R检验法对五轴机床回转轴的误差运动进行高效、自动化观测的方案。在五轴测量周期中，R测试传感器套装测量安装在转台上的坐标系中连接到主轴上的球体的三维位移。本文首先介绍了一种直观的R检验测量图形表示方法，以了解转台误差运动如何在三维空间中随旋转角度的变化而变化。用R检验法进行误差检定的一个关键问题是，作为检定旋转轴分量误差的先决条件，直线轴的误差运动必须足够小。为了部分解决这一问题，本文提出了一种通过执行一组不同球面位置的R检验测量周期来分离线轴垂直度误差的方案。
This paper presents an efficient and automated scheme to observe error motions of rotary axes on a five-axis machine tool by using the R-test. During a five-axis measurement cycle, the R-test sensors nest measures the three-dimensional displacement of a sphere attached to the spindle in the coordinate system attached on the rotary table. This paper first demonstrates an intuitive, graphical presentation method of R-test measurements to understand how error motions of rotary table change in three-dimensional space depending on the swiveling angle. A critical issue with the error calibration by the R-test is that error motions of linear axes must be sufficiently small as a prerequisite to calibrate component errors of rotary axes. To partially address this issue, this paper proposes a scheme to separate squareness errors of linear axes by performing a set of R-test measurement cycles with different sphere positions.