Research on finite element helical line direction modification of flexspline profile in harmonic reducer
ZHOU Weihong
WANG Zhonghou
CHEN Mingzhi
WANG Fa
MA Jingkai
Abstract：To solve the stress concentration problem caused by tooth interference and insufficient tooth surface contact during the operation of harmonic reducers,an axial modification method based on the finite element method(FEM)was proposed.Firstly,the profiles of the flexspline and circular spline were designed based on the requirement of tooth contact analysis(TCA),laying a foundation for the accurate simulation of the working state of the harmonic reducer.Subsequently,the flexspline model was reconstructed based on the FEM for TCA.On the premise of maintaining the integrity of the original flexspline profile,axial modification was conducted.Finally,the modification effect was verified through finite element simulation.The results show that after modification,the maximum equivalent stress and meshing pressure on the flexspline tooth surface are significantly reduced,and the tooth surface contact area is obviously expanded.This method effectively solves the problems of tooth interference and stress concentration,significantly improves transmission smoothness,and provides technical reference for the optimization of gear meshing performance of harmonic reducers.
Keywords：Harmonic reducerFlexspline profileAxial modificationFinite element methodMeshing performance
Publication Date：2025-11-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 19-25 )