CAJ | 학술논문

为了对多轴数控机床旋转轴与平移轴联动误差进行快速测量与溯源,提出了一种基于数控机床内置的光栅尺、编码器等无传感器信息的评估方法.该方法通过对数控系统的二次开发,可获取配置不同数控系统的多轴机床的无传感器信息,依据旋转轴与平移轴的联动特性,构造了具有一些球杆仪特征的虚拟杆,且规划了虚拟杆切向测试路径,并采用单旋转轴与两平移轴联动方式,进行圆度误差测试,实现了多轴数控机床旋转轴与平移轴联动误差的动态快速测量.此外,基于虚拟杆的工作原理,分别建立了联动误差关联及解耦模型,并提出了利用空间圆周图谱和小波频谱技术进行联动误差快速溯源的策略.试验结果表明,所提出的旋转轴与平移轴联动误差测试与溯源方法实用、有效,为多轴数控机床旋转轴与平移轴联动误差补偿奠定了基础.
위료대다축수공궤상선전축여평이축련동오차진행쾌속측량여소원,제출료일충기우수공궤상내치적광책척、편마기등무전감기신식적평고방법.해방법통과대수공계통적이차개발,가획취배치불동수공계통적다축궤상적무전감기신식,의거선전축여평이축적련동특성,구조료구유일사구간의특정적허의간,차규화료허의간절향측시로경,병채용단선전축여량평이축련동방식,진행원도오차측시,실현료다축수공궤상선전축여평이축련동오차적동태쾌속측량.차외,기우허의간적공작원리,분별건립료련동오차관련급해우모형,병제출료이용공간원주도보화소파빈보기술진행련동오차쾌속소원적책략.시험결과표명,소제출적선전축여평이축련동오차측시여소원방법실용、유효,위다축수공궤상선전축여평이축련동오차보상전정료기출.
To rapidly measure and trace the simultaneous rotary-translational(R-T) axes motion error of multi-axes numerical control(NC) machine tool, a kind of motion error estimation method based on built-in sensor, such as grid scale and motor encoder, is proposed. The sensorless information of multi-axis NC machine tool is obtained via the redevelopment of the different NC system. According to the characteristics of simultaneous R-T axes motion, a virtual bar with some functions of ballbar is constructed. And the virtual bar-based test path of circular error test through collaborative motion of a rotary axis and two translational axes is scheduled, which is implemented to measure the simultaneous R-T axes motion error of multi-axis NC machine tool. Then, the coupling and decoupling mathematical models of the motion error is established based on the test principle of the virtual bar, respectively. To localize the error sources conveniently, some typical spatial error charts and the wavelet spectrum analysis technology are introduced. The experimental results show the practicability and effectiveness of the proposed method for measuring the motion error.