摘要
复合叠层材料钻孔加工时,伴随着刀具的磨损,会产生丰富的声发射信号。刀具在加工叠层材料接触面时会引起声发射信号突变,为研究该过程信号的突变规律,采用硬质合金钻头与碳纤维复合材料-铝合金叠层板件开展了一系列实验,采集制孔过程中刀具的声发射信号,对信号进行了时频域多分辨率分析。研究表明,在刀具从复合材料加工至铝合金过程中,信号强度逐渐降低,高频段成份逐渐增加。
When drill heads drill holes on composite laminated material, acoustic emission signal is generated. When the tool is brought into contact with the laminated material surface, AE signal suddenly changes. To study its law, this paper makes a series of experiments on hard alloy tools and carbon fiber composite material-aluminum alloy laminated pieces and collects the acoustic emission signal in the process, and then analyzes the multi resolution of its time-frequency domain. The result shows that in the process of the composite materials and aluminum alloy processing, the signal intensity decreases gradually and the high frequency component increases gradually.
作者
谢小明
冷晟
徐青
管晨丞
XIE Xiaoming;LENG Sheng;XU Qing;GUAN Chencheng(College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《机械制造与自动化》
2019年第1期30-32,共3页
Machine Building & Automation
基金
南京航空航天大学研究生创新基地(实验室)开放基金(kfjj20160517)
中央高校基本科研业务费专项资金
关键词
叠层材料
刀具磨损
声发射
小波包能量
laminated material
tool wear
acoustic emission
wavelet packet energy
