微铣削表面BEMD基准面的三维粗糙度参数研究

2018-06-20

作者：齐云，许金凯，于占江，于化东单位：长春理工大学精密制造及检测技术国家地方联合工程实验室

摘要：针对二维粗糙度评价微铣削表面不够合理、全面等问题，根据微铣削表面三维微观形貌结构特征，提出了一种基于二维经验模态分解算法（BEMD）的三维粗糙度参数体系。该体系采用BEMD算法获取三维粗糙度计算的评定基准面，通过数值模拟的微铣削表面选取适用于评价微铣削表面的三维粗糙度参数。研究结果表明，BEMD基准面能够作为三维粗糙度计算的基准面；与二维粗糙度相比，所选取的9个三维粗糙度参数能够更全面准确地反映微铣削表面的微观形貌特征。

关键词：BEMD；三维粗糙度；微铣削

中图分类号：TG84；TH161+.14文献标志码：A

Research on 3D Roughness Parameter of Micromilling Surface

Based on BEMD Reference Plane

Qi Yun，Xu Jinkai，Yu Zhanjiang，Yu Huadong

Abstract:To compensate the deficiencies of the 2D surface roughness evaluation，a 3D roughness parameter system based on the bidimensional empirical mode decomposition (BEMD) algorithm is used to evaluate the microtopography of the surface.In this system，the BEMD algorithm is used to obtain the reference plane to calculate the 3D roughness.The different micromilling surfaces are simulated，and the 3D roughness parameters which are suitable for evaluating the micromilling surface are selected.The results show that the BEMD reference plane can be used as the base of 3D roughness calculation.Compared with the twodimensional roughness，the nine selected 3D roughness parameters can reflect the microtopography characteristics of micromilling surface more comprehensively and accurately.

Keywords:bidimensional empirical mode decomposition (BEMD)；3D roughness；micromilling