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<p>Contact measurement plays a pivotal role in manufacturing and application of micro-gears. Nevertheless, conventional contact measurement techniques may result in data gaps at the tooth roots and induce measurement errors stemming from microscopic interactions. In this paper, the mechanism of the effects of the WC probe on the dynamic measurement of Fe-based micro-gears was investigated. The three-dimensional (3D) morphological changes were analyzed by using LAMMPS simulation software. Wear count and displacement, friction change rule, and mechanism of the Fe-based micro-gear surface during dynamic measurement under different loads and measurement speeds were studied. The local dislocation during the dynamic measurement was predicted. The results show that the height of the worn atom accumulation and the count of worn atoms on both edges of the wear scar decrease with the increase in the measurement speed under the same load. However, the height of the atom accumulation ahead of the probe increases, resulting in increased friction and the decrease in the count of worn atoms ahead of the probe. At a fixed measurement speed, both the overall stacking height of worn atoms and their total count increase with increasing load, thereby increasing the coefficient of friction.</p>

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Effects of Load and Measurement Speed on Dynamic Measurement Process of Surface Morphology of Fe-Based Micro-Gears: A Molecular Dynamics Simulation

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Song Chen,
  • Ming Chen,
  • Wei Chen,
  • Xiaohong Zhang,
  • Zhaoyao Shi,
  • Lei Wei,
  • Jiaming Liu

摘要

Contact measurement plays a pivotal role in manufacturing and application of micro-gears. Nevertheless, conventional contact measurement techniques may result in data gaps at the tooth roots and induce measurement errors stemming from microscopic interactions. In this paper, the mechanism of the effects of the WC probe on the dynamic measurement of Fe-based micro-gears was investigated. The three-dimensional (3D) morphological changes were analyzed by using LAMMPS simulation software. Wear count and displacement, friction change rule, and mechanism of the Fe-based micro-gear surface during dynamic measurement under different loads and measurement speeds were studied. The local dislocation during the dynamic measurement was predicted. The results show that the height of the worn atom accumulation and the count of worn atoms on both edges of the wear scar decrease with the increase in the measurement speed under the same load. However, the height of the atom accumulation ahead of the probe increases, resulting in increased friction and the decrease in the count of worn atoms ahead of the probe. At a fixed measurement speed, both the overall stacking height of worn atoms and their total count increase with increasing load, thereby increasing the coefficient of friction.