首页|轮廓法表面粗糙度幅度参数分析及其应用研究

轮廓法表面粗糙度幅度参数分析及其应用研究

扫码查看
表面粗糙度的评价方法和评价参数较多,但在零件设计、加工和测量等环节常存在评价参数选用单一及选用不当等问题.从统计学的角度剖析了轮廓法中幅度参数Ra,Rq,Rsk和Rku的数学内涵,指出其分别关联着轮廓纵坐标值的1~4阶原点矩,可以表达纵坐标值的均值、标准差、分布偏态和峰态.普通精度结构件的联接面、配合面粗糙度轮廓近似对称分布,故采用参数Ra评价较为合理.以功能要求为主的导向面、密封面、摩擦面和超精加工表面等轮廓常显著不对称,采用参数Rq和Rsk联合评价较为合理.本文给出了内燃机缸套、数控机床导轨、数控刀柄工作面的表面粗糙度测量实例,验证了理论分析,为零件表面粗糙度的设计、测量和评价提供了参考.
Investigation and Assessment on Amplitude Parameters of Surface Roughness Based on Profile Method
There are many methods and parameters to assessing surface roughness of machined surface of component.However,there are some problems such as single and improper selection of evaluation parameters in parts design,processing and measurement.Therefore,the amplitude parameters of surface roughness such as Ra,Rq,Rsk and Rku based on profile method are paid more attention to be analyzed.This paper presents that the amplitude parameters represent the 1st~4th or-der origin moments of the profile ordinate value respectively.Meanwhile,they can stand for mean value,standard deviation,skewness and kurtosis of vertical coordinate value respectively in statistics principle.The roughness profile of the joint sur-face and mating surface of ordinary precision structural parts are approximately symmetrical.So it is more reasonable to e-valuate surface roughness of these surfaces in the way of Ra parameter.Furthermore,the roughness profile of guide surface,sealing surface,friction surface and superfinished surface based on functional requirements are significantly asymmetrical.Thus,it is more reasonable to evaluate surface roughness of these surfaces in the combination method of Rq and Rsk parame-ters.Finally,the surface roughness measurement examples of the cylinder liner of the internal combustion engine,the guide rail of the numerical control machine tool and the working surface of the numerical control tool shank are carried out,which results verifies the theoretical analysis.The investigation provides a reference for the design,measurement,analysis and evaluation of the surface roughness of the parts.

surface roughnessamplitude parametermathematical distributionassessment

庞学慧、张晓艳、秦慧斌、张晋

展开 >

山西师范大学现代文理学院(转设筹备处)

先进制造技术山西省重点实验室

太原科技大学应用科学学院

表面粗糙度 幅度参数 数学分布 评价

教育部科技发展中心产学研创新基金山西省专利推广实施资助

2021DZ00120210519

2024

工具技术
成都工具研究所

工具技术

CSTPCD北大核心
影响因子:0.147
ISSN:1000-7008
年,卷(期):2024.58(1)
  • 17