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<p>Linear rolling guides inevitably exhibit manufacturing and installation errors, which affect the heat generation and deformation of the guide system and, consequently, its thermo-mechanical coupling characteristics. Based on Hertzian contact theory, this study establishes a finite element model for heat transfer and thermo-mechanical coupling in a linear rolling guide, incorporating preload force, raceway center-distance error, guideway installation error, and ball machining error. The influence of combined geometric errors on temperature distribution and deformation is investigated under different loading conditions. The results show that both the temperature and deformation of the linear rolling guide increase linearly with load. On average, combined geometric errors increase the slider surface temperature rise by 5.3% and the thermo-mechanical coupling deformation by 24.64% under different loads. Experiments on the temperature rise and structural deformation of the linear rolling guide were conducted to validate the finite element simulations. Compared with the model considering only preload, the proposed method, which incorporates combined geometric errors, shows better agreement with the experimental results. This method provides a basis for subsequent investigations into dynamic characteristics, wear mechanisms, and precision sustainability.</p>

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Effect of combined geometric errors on thermal characteristics and thermo-mechanical deformation in linear rolling guide

  • 期刊论文

  • 发表日期：

    2026年6月16日

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  • Yaru Song,
  • Hang Zhu,
  • Zhaoqiang Chen,
  • Mingdong Yi,
  • Hui Chen,
  • Jingjie Zhang,
  • Guangchun Xiao,
  • Xianglong Meng,
  • Chonghai Xu

摘要

Linear rolling guides inevitably exhibit manufacturing and installation errors, which affect the heat generation and deformation of the guide system and, consequently, its thermo-mechanical coupling characteristics. Based on Hertzian contact theory, this study establishes a finite element model for heat transfer and thermo-mechanical coupling in a linear rolling guide, incorporating preload force, raceway center-distance error, guideway installation error, and ball machining error. The influence of combined geometric errors on temperature distribution and deformation is investigated under different loading conditions. The results show that both the temperature and deformation of the linear rolling guide increase linearly with load. On average, combined geometric errors increase the slider surface temperature rise by 5.3% and the thermo-mechanical coupling deformation by 24.64% under different loads. Experiments on the temperature rise and structural deformation of the linear rolling guide were conducted to validate the finite element simulations. Compared with the model considering only preload, the proposed method, which incorporates combined geometric errors, shows better agreement with the experimental results. This method provides a basis for subsequent investigations into dynamic characteristics, wear mechanisms, and precision sustainability.