基于球杆仪的旋转轴几何误差测量和辨识  

Geometric Error Measurement and Identification for Rotary Table Using Double Ballbar

作　　者：陈剑雄[1] 林述温[1] 韩国强[1,2] 

机构地区：[1]福州大学机械工程及自动化学院,福建福州350108 [2]中国科学院福建物质结构研究所,福建福州350002

出　　处：《计量学报》2014年第3期198-203,共6页Acta Metrologica Sinica

基　　金：基金项目：国家自然科学基金（51205063）;中国博士后基金（2012M521281,2013T60643）;福建省重大科技专项（2010HZ002-1）

摘　　要：通过圆弧测量轨迹，移动球杆仪测量球心在旋转工作台上3个安装位置的9项误差，采用齐次变换理论建立几何误差辨识模型，引入系数矩阵条件数进行安装参数的优化选取，提出一种辨识旋转轴4项位置和6项运动误差的方法。最后，在四轴数控加工中心上进行了测量和验证实验，该方法可辨识出全部的几何误差项，通过对几何误差计算出的预测值和球杆仪的测量值的比较，预测值的绝对误差小于0．003mm，具有辨识精度高、测量省时的优点。The derivations of the center of the ball installed on the rotary table are measured by double ballbar with circular paths in the error sensitive directions. Hence, there are nine results measured from three mounting positions of the ball at the same rotation angle, to form four axis location and six motion errors identification model using homogeneous transformation. In addition, the condition number is applied to select the optimum installation parameters of the ballbar. Finally, the measurement and verification experiments are conducted on the four-axis machining center. All the elements of the geometric error can be identified by the proposed method from the measured results with high accuracy and measuring effectively. Then, comparing the predicted value from the identified errors with the measured results by ballbar, it shows that the absolute residual error is less than 0. 003 mm.

关 键 词：计量学 旋转轴 几何误差 球杆仪 条件数 

分 类 号：TB92[一般工业技术—计量学]