Discrete element simulation and test study on the barrel finishing process of aviation gears
ZHAO Zemin
LI Guihua
ZHU Guangzhao
TANG Jinyuan
LI Xin
LIU Qingsong
Abstract：[Objective]Aircraft gears typically operate in extreme environments such as high temperatures,high speeds,and heavy loads,requiring excellent comprehensive performance.Surface integrity parameters have a decisive impact on gear fa-tigue performance.Rolling grinding is a finishing process that utilizes the mechanical action of abrasives to improve the surface integrity of workpieces.To improve the surface integrity and fatigue life of aviation gears,it is necessary to explore the behavior of the contact interface between the tooth surface and abrasive particles in gear rolling and polishing machining.[Methods]A simulation model for the barrel finishing of aerospace gears was established based on the discrete element method to analyze the material removal from the gear surface.A predictive model for the three-dimensional surface roughness Sa value of gear surfaces was developed.Barrel finishing experiments were designed for 14CrMnSiNi2MoA aerospace cylindrical spur gears.The evolu-tion of surface morphology and residual stress over time,before and after finishing,was analyzed.[Results]The results indicate that barrel finishing significantly reduces the surface roughness of aerospace gears and increases surface compressive residual stress.However,the finishing effects vary across different positions on the tooth surface,with the abrasive action strength on the tooth surface following the pattern:near the gear tip>pitch circle>near the gear root.
Keywords：Aviation gearsBarrel finishingDiscrete element methodSurface morphologyResidual stress
Publication Date：2025-02-14
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 138-144 )