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浙江大学学报(工学版)
浙江大学学报(工学版)
机械工程     
五轴数控机床旋转轴几何误差辨识新方法
付国强,傅建中,沈洪垚
浙江大学 流体动力与机电系统国家重点实验室,浙江 杭州 310027
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
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摘要：

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.
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.
出版日期: 2015-12-26
:  TH 161  
基金资助:

 国家自然科学基金资助项目(51175461)；高等学校博士学科点专项科研基金资助项目(20120101110055)浙江省自然科学基金项目(Y14E050069)
通讯作者: 傅建中，男，教授,博导     E-mail: fjz@zju.edu.cn
作者简介: 付国强（1988-），男，博士生，从事精密仪器、先进数控技术研究工作.E-mail：fuguoqiang_1988@126.com
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引用本文:

付国强,傅建中,沈洪垚. 五轴数控机床旋转轴几何误差辨识新方法[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2015.05.006.

FU Guo-qiang, FU Jian-zhong, SHEN Hong-yao. One novel geometric error identification of rotary axes for five-axis machine tool. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2015.05.006.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2015.05.006    或    http://www.zjujournals.com/eng/CN/Y2015/V49/I5/848

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