Characterization of Machined Surface Topography Based on the Normal Declination Angle of Microfacets.

Wei-Chao Shi,Qi Li,Li-Jie Wang,Jian-Ming Zheng,Qi-Long Wang

doi:10.3390/mi12030228

Abstract

It is important to characterize surface topography in order to study machined surface characteristics. Due to the features of periodicity and randomness of machined surface topography, the existing topographical parameters may not describe its features accurately. A novel characterization method called the normal declination angle of microfacet-based surface topography is thus proposed for this task. The topography of machined surfaces is measured and the data on the normal declination angle are obtained. Then, surface topography is analyzed via the distribution of the normal declination angle. The lognormal distribution characterization model of machined surface topography is established, and the accuracy of the model is verified by error analysis. The results show that the calculated results of the present characterization model are generally consistent with the distribution of the normal declination angle, where the maximal root mean square errors (RMSE) is 4.5%. Therefore, this study may serve as an effective and novel way to describe the characteristics of the machined surface topography.

Highlights

Machined surface topography refers to the microgeometry shape left on a workpiece surface by tools and chips during the machining process [1], which is widely used in the research fields of joint surface characteristics, lubrication part design, surface scattering characteristics, and 3D reconstruction [2,3,4]
It is of great significance for modern engineering to accurately and effectively characterize machined surface topography [5,6]
Panda et al studied the effect of the topography of counter-surfaces on the wear of engineering polymers by using the topographical parameters, and established the characterization model of counter-surfaces topography based on the Weibull distribution, realizing the prediction of counter-surfaces on the wear of polymers [14]

Summary

Introduction

Machined surface topography refers to the microgeometry shape left on a workpiece surface by tools and chips during the machining process [1], which is widely used in the research fields of joint surface characteristics, lubrication part design, surface scattering characteristics, and 3D reconstruction [2,3,4]. It is of great significance for modern engineering to accurately and effectively characterize machined surface topography [5,6].

Methods

Results

Conclusion