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<p>This study examined the scuffing properties of gears with different surface textures produced by grinding, small-angle honing, and barreling. With the increase in electric and hybrid vehicles that demand lighter drive units, gears are being subjected to higher loads and speeds, increasing scuffing concerns. Traditional assessments using frictional coefficient, Hertzian pressure, and sliding velocity (<InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\mu\)</EquationSource> </InlineEquation>PV) values and flash temperature rely on outdated frictional formulas. This article proposes a&#xa0;modified equation incorporating areal surface roughness parameters for better estimation. The gear scuffing tests show that the contact temperatures calculated with the modified equation are consistent across various gear types, surpassing those calculated with the original equation—approaching the critical temperature by 31 °C and reducing its standard deviation by 40%.</p>

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Scuffing properties of gear pairs with different surface textures (grinding, small-angle honing, and barreling)

  • 期刊论文

  • 发表日期：

    2025年8月22日

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  • Junichi Hongu,
  • Sakyo Hashimoto,
  • Junya Kato,
  • Takumi Inawaka,
  • Takao Koide

摘要

This study examined the scuffing properties of gears with different surface textures produced by grinding, small-angle honing, and barreling. With the increase in electric and hybrid vehicles that demand lighter drive units, gears are being subjected to higher loads and speeds, increasing scuffing concerns. Traditional assessments using frictional coefficient, Hertzian pressure, and sliding velocity ( \(\mu\) PV) values and flash temperature rely on outdated frictional formulas. This article proposes a modified equation incorporating areal surface roughness parameters for better estimation. The gear scuffing tests show that the contact temperatures calculated with the modified equation are consistent across various gear types, surpassing those calculated with the original equation—approaching the critical temperature by 31 °C and reducing its standard deviation by 40%.