A method for generating grinding of internal helical gears based on spherical worm grinding wheel
JIANG Chuang
SHANG Yongshuai
HAN Zhengyang
WANG Zehua
Abstract：[Objective]With the explosive growth of demand for high-precision internal helical gears in the electric vehicle industry,traditional machining technologies such as shaping,honing,and form grinding face bottlenecks including severe tool wear,insufficient tooth surface error correction capability,and low processing efficiency,which are difficult to meet the development requirements of short production cycles and high-performance transmissions for electric vehicles.Therefore,a new machining method for internal helical gears based on generating grinding with a spherical worm grinding wheel was proposed.[Methods]Based on the conjugate surface envelopment theory and spatial meshing principle,the mapping relationships among the equivalent helical gear tooth surface,spherical worm grinding wheel tooth surface,and internal helical gear tooth surface were systematically constructed.Through rigorous mathematical derivation,the profile equation and spiral angle of the spherical worm grinding wheel were solved to achieve precise digital characterization of the double tooth surfaces.Simulation analysis was carried out using Vericut software to quantify the deviation between the theoretical tooth surface and the simulated tooth surface.[Results]The research confirms that the generating grinding technology with a spherical worm grinding wheel can effectively achieve high-precision machining of internal helical gears,providing a new path and reference for breaking through the manufacturing technology bottlenecks of core transmission components in electric vehicles.
Keywords：Internal helical gearGenerating grindingSpherical worm grinding wheelProcessing simulation
Publication Date：2025-09-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：7( 112-118 )