孔表面粗糙度与AE信号能量计数相关性的研究

Study on Correlation between Surface Roughness and Energy Count of AE Signal

针对液体磁性磨具小孔光整加工时无法实时动态检测孔表面粗糙度的问题,将声发射无损检测技术应用在液体磁性模具孔光整加工技术中,通过对采集到的AE信号进行分析研究,得出声发射信号与工件表面粗糙度有明显的相关性,通过特征值参数分析方法提取了能量计数AE特征值,得出能量计数的分布可以用来表征工件表面粗糙度变化情况。研究结果为液体磁性磨具光整加工的实时动态检测提供了有价值的参考。

In view of the problem that the surface roughness of the hole can not be detected in machining in real-time,the acoustic emission(AE)nondestructive testing technology is applied to the processing technology of the fluid magnetic abrasive.Through the analysis and study of the collected AE signal,it was found that the AE signal has a significant correlation with the surface roughness of the workpiece.The characteristic value of the energy count AE was extracted by the eigenvalue parameter analysis method,and the distribution of the energy count could be used to characterize the change of the surface roughness of the workpiece.This study result provides a valuable reference for real-time dynamic detection of fluid magnetic abrasive.