|
|
|
| One novel geometric error identification of rotary axes for five-axis machine tool |
| FU Guo-qiang, FU Jian-zhong, SHEN Hong-yao |
| The State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China |
|
|
|
Abstract In order to obtain all the geometric errors of rotary axes for a five-axis machine tool systematically and easily, a geometric error identification approach with ballbar measurement, six-circle technology, is developed. The influences of geometric errors of rotary axes on the integrated errors of five-axis CNC machine tools were obtained based on the geometric error model. By comparing with the nine-line method of linear axes, six-circle technology was established due to the characteristic of ballbar. This approach identified all the ten errors of each axis, including squareness errors and offset errors through analyzing the property of geometric errors. The impact of the set-up errors of ballbar was analyzed to improve the accuracy of six-circle technology. The set-up errors were obtained using the least square method, and they were removed from the measured data of ballbar. He simulation validated that elimination of set-up errors is appropriate enough. Six-circle technology was used to identify the geometric errors of rotary axes for five-axis machine tools. The measured data with compensation of geometric errors of rotary axis were compared with those without compensation. The measured errors with compensation decreased about from 50% to 80%. The experiments show that six-circle technology is precise in a systematic way and can identify different types of rotary axes.
|
|
Published: 26 December 2015
|
|
|
五轴数控机床旋转轴几何误差辨识新方法
为了系统、快速方便地测量五轴数控机床2个旋转轴所有的几何误差项,提出一种基于球杆仪测量的六圈法几何误差辨识方法.基于五轴数控机床几何误差模型分析旋转轴几何误差项对机床综合几何误差的影响,与平动轴9线法辨识原理比较,并结合球杆仪测量的特点,建立六圈法辨识方法.该方法根据旋转轴各个几何误差项的性质可辨识得到每个旋转轴包括垂直度误差和安装误差的全部10项几何误差.为了提高六圈法辨识精度,分析球杆仪安装误差对测量数据的影响,并用最小二乘法得到球杆仪安装误差,从测量数据中剔除安装误差的影响,仿真结果验证了消除安装误差方法的正确性.采用六圈法测量辨识机床旋转轴误差,并比较补偿旋转轴误差前后的测量数据,补偿后误差降低了50%到80%,实验结果表明,六圈法辨识精度高,系统性好,可以测量不同的旋转轴.
|
|
| ［1］ SHEN H, FU J, HE Y, et al. On-line asynchronous compensation methods for static/quasi-static error implemented on CNC machine tools ［J］. International Journal of Machine Tools and Manufacture, 2012. 60(0): 14-26．
［2］ 王金栋, 郭俊杰, 费致根, 等. 基于激光跟踪仪的数控机床几何误差辨识方法［J］. 机械工程学报, 2011(14):13-19．
WANG Jin-dong, GUO Jun-jie, FEI Zhi-gen, et al. Method of geometric error identification for numerical control machine tool based on laser tracker ［J］. Chinese Journal of Mechanical Engineering, 2011. 47(14): 13-19．
［3］ ZHU S, DING G, QIN S, et al. Integrated geometric error modeling, identification and compensation of CNC machine tools ［J］. International Journal of Machine Tools and Manufacture, 2012. 52(1): 24-29．
［4］ FU G, FU J, XU Y, et al. Product of exponential model for geometric error integration of multi-axis machine tools ［J］. The International Journal of Advanced Manufacturing Technology, 2014. 71(9/12): 1653-1667．
［5］ LEI W T, HSU Y Y. Error measurement of five-axis CNC machines with 3D probe–ball ［J］. Journal of Materials Processing Technology, 2003. 139(1/3): 127-133．
［6］ WEIKERT S. R-Test, A new device for accuracy measurements on five axis machine tools ［J］. CIRP Annals - Manufacturing Technology, 2004. 53(1): 429-432．
［7］ ZARGARBASHI S H H, MAYER J R R, Assessment of machine tool trunnion axis motion error, using magnetic double ball bar ［J］. International Journal of Machine Tools and Manufacture, 2006. 46(14): 1823-1834．
［8］ TSUTSUMI M, SAITO A. Identification and compensation of systematic deviations particular to 5-axis machining centers ［J］. International Journal of Machine Tools and Manufacture, 2003. 43(8): 771-780．
［9］ TSUTSUMI M, SAITO A. Identification of angular and positional deviations inherent to 5-axis machining centers with a tilting-rotary table by simultaneous four-axis control movements ［J］. International Journal of Machine Tools and Manufacture, 2004. 44(12/13): 1333-1342．
［10］ TSUTSUMI M, TONE S, KATO N, et al. Enhancement of geometric accuracy of five-axis machining centers based on identification and compensation of geometric deviations ［J］. International Journal of Machine Tools & Manufacture, 2013,68: 1120．
［11］ LEE K I, LEE D M, YANG S H. Parametric modeling and estimation of geometric errors for a rotary axis using double ball-bar ［J］. International Journal of Advanced Manufacturing Technology, 2012. 62(5/8): 741-750．
［12］ LEE K I, YANG S H. Robust measurement method and uncertainty analysis for position-independent geometric errors of a rotary axis using a double ball-bar ［J］. International Journal of Precision Engineering and Manufacturing, 2013. 14(2): 231-239．
［13］ LEE K I, YANG S H. Measurement and verification of position-independent geometric errors of a five-axis machine tool using a double ball-bar ［J］. International Journal of Machine Tools and Manufacture, 2013. 70(0): 45-52．
［14］ 胡建忠, 王波雷, 王民,等. 基于双频激光干涉仪的DM1007数控铣床几何误差辨识的实验研究［J］. 制造技术与机床, 2010(04): 103-106．
HU Jian-zhong, WANG Bo-lei, WANG Min, et al. The study of geometric error identification of DM1007 milling machine based on laser interferometer ［J］. Manufacturing Technology & Machine Tool, 2010(4): 103-106．
［15］ HE Z Y, FU J Z, YAO X H. Volumetric error modeling and Analysis for CNC machine tool based on multi-body system ［J］. Key Engineering Materials, 2010. 426-427: 441-446．
［16］ LIN Y, SHEN Y. Modelling of five-axis machine tool metrology models using the matrix summation approach ［J］. The International Journal of Advanced Manufacturing Technology, 2003. 21(4): 243-248. |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
