Analysis of load-bearing contact characteristics of face gears considering the microtopography of tooth surface
LI Zhisheng
GAO Song
CAI Zhiqin
SHUI Jianfeng
YANG Shufeng
XU Fei
Abstract：[Objective]The microtopography formed on the tooth surface of face gears during grinding processing can significantly alter the contact mechanical behavior of the tooth surface.The assumption of ideally smooth tooth surfaces in traditional contact analysis was broken through,and an improved loaded contact analysis method for face gear pairs integrating microtopography characteristics was proposed.[Methods]Firstly,the tooth contact analysis(TCA)and the loaded tooth contact analysis(LTCA)were applied to the theoretical tooth surface model to obtain discrete points of the meshing trajectory,macroscopic contact ellipses,and load distribution patterns.Secondly,surface microtopography measurement data were integrated to construct a three-dimensional(3D)topographical model that incorporated grinding texture orientation and statistical characteristics of microasperities.Thirdly,the load-bearing contact region was discretized into micro-element meshes.Through iterative calculations of normal deformation and application of micro contact determination criteria,a dimension-reduced mapping model for microtopography deformation compensation was established,transforming the 3D rough contact problem into a superposition problem of elastoplastic deformation of microasperities in two-dimensional(2D)plane.Finally,a computational model for the real contact area based on the contact point domain integration method was proposed,and a micro-macro coupled stress redistribution algorithm was developed.[Results]Research indicates that microtopography reduces the effective contact area by an average of 8.6%,and the maximum increase ratio of contact stress is 19.3%in the single-tooth meshing stage compared with the theoretical value.As the grinding depth increases from 0.005 mm to 0.015 mm,the microtopography texture becomes more complex,leading to a further deterioration in load-bearing contact performance.
Keywords：Face gear transmissionTooth surface microtopographyLoaded tooth contact analysisTopography-performance coupling design
Publication Date：2025-12-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：10( 10-19 )