CAJ | 학술논문

主轴回转精度是影响零件加工精度的主要因素之一。针对传统的傅里叶变换对主轴回转误差运动的采样信号进行消噪时,使用低通滤波器会损失主轴回转误差运动某些有用成分的问题,提出了基于小波变换的消噪滤波方法对主轴回转误差进行动态测量。文章在分析主轴回转误差的测试原理和信号特点的基础上,通过选用合适的小波基和阈值分离出基准球安装偏心误差,信号的信噪比由初始值15.447db提高为18.105db,去噪效果明显。实验结果表明,采用文中方法对C616主轴回转精度进行测量,其测量结果与DJ-HZ-1型机床回转精度测量分析仪的测量结果基本吻合。
주축회전정도시영향령건가공정도적주요인소지일。침대전통적부리협변환대주축회전오차운동적채양신호진행소조시,사용저통려파기회손실주축회전오차운동모사유용성분적문제,제출료기우소파변환적소조려파방법대주축회전오차진행동태측량。문장재분석주축회전오차적측시원리화신호특점적기출상,통과선용합괄적소파기화역치분리출기준구안장편심오차,신호적신조비유초시치15.447db제고위18.105db,거조효과명현。실험결과표명,채용문중방법대C616주축회전정도진행측량,기측량결과여DJ-HZ-1형궤상회전정도측량분석의적측량결과기본문합。
Error-motion of spindle rotation affecting the machining accuracy of parts is one of main factors. Due to de-noising of spindle rotation error-motion with low pass filter in traditional fourier transform caused the loss of some useful signal, dynamic measurement for error-motion of spindle rotation based on wavelet de-noising is put forward. After analyzing the measuring principle and characteristic of the rotation error, the eccentricity error caused when installing standard ball is separated by selecting appropriate wavelet base and threshold value, and the signal-to-noise ratio is increased from 15. 447db to 18. 105db . Experimental result showed that the rotation precision on C616 with the proposed method in this paper was in accordance with DJ-HZ-1 machine tool rotation precision measuring instrument.