摘要
功率谱密度(power spectral density,PSD)用于描述随机过程的功率随频率的分布。在超精密加工实验中,功率谱方法不仅仅用于切削力信号分析,还可以用于超精密加工表面微观形貌分析;既可以反映出不同频率在表面形貌中所占的比重,还可揭示切削参数、工件材料性能等对超精密加工表面生成的影响程度。该文使用PSD方法对超精密飞刀铣削在不同进给速度下加工不同工件材料的实验结果进行分析,结果表明,相比于表面粗糙度参数来说,PSD方法更有利于表现出工件材料对超精密加工表面的影响。
The power spectral density （PSD） is applied to describe the frequency distribution of power in the random process. The PSD method is used not only to analyze the cutting force signal, but also to study the micro surface topography in the ultra-precision cutting experiment. The PSD is used to investigate the effect of feed rate and workpiece materials on surface finishing in ultra-precision raster milling. The experimental results show that the PSD is more suitable to present the influence of materials on surface generation in ultra-precision machining technology,as compared with the surface roughness parameters.
出处
《实验技术与管理》
CAS
北大核心
2015年第5期75-81,共7页
Experimental Technology and Management
基金
国家自然科学基金项目(51205067)
教育部"专业综合改革试点"项目(ZG0398)
关键词
功率谱密度
超精密加工
表面质量
切削力
power spectral density （PSD）
ultra-precision machining
surface quality
cutting force
