摘要
高压水射流切割质量和切割效率受到多个因素的影响,其中优化切割速度可以同时提高切割质量和切割效率。经过大量实验,提出一种击穿时间反映切割速度的模型。为了得到击穿时间,用录音笔录制了击穿过程中的声音特征,发现在刚开始冲击的时刻和工件被打通的时刻,声音有明显的突变。鉴于此,运用小波分析的方法,通过MATLAB编程,从录制的击穿时间信号中有效提取了声音的突变点,从而获得击穿时间,建立了击穿时间与切割速度的量化关系。最后,通过现场实验验证了该模型的有效性。
The cutting quality and the cutting efficiency of high-pressure water jet are influenced by many factors,among which optimizing the cutting speed is capable to improve the cutting performance.After a large number of experiments,a model reflecting the relationship between the punching time and the cutting speed was proposed.In order to get the punching time,some sound characteristics in the whole process are recorded by a voice recorder.And it was found that there was a significant sound mutation both at the beginning of the cutting and the moment of getting through.Therefore,by using wavelet analysis method and MATLAB,the moment of the significant sound mutation from the recorded time signal was extracted effectively,and thus the punching time was obtained.Furthermore,the quantitative relationship between the punching time and the cutting speed were estab lished.Finally,the validity of the m odel was verifi ed by fi eld e xperiments.
出处
《现代科学仪器》
2014年第4期86-90,共5页
Modern Scientific Instruments
基金
“江苏高校优势学科建设工程资助项目”
柔性超高压水切割系统（测控技术）研发,江苏省重大科技成果转化项目（BA2009001）
关键词
高压水射流
切割速度优化
击穿时间
小波分析
声音突变点
High-pressure water jet
Cutting speed optimizat ion
Punching time
Wavelet analysis
Sound mutation
