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<p>In order to ensure that the lapping trajectories can more uniformly and efficiently cover the entire spherical surface during the processing of balls, a precision machining method employing eccentric rotated tri-plates is proposed to satisfy the high precision demands of miniature balls. An experimental equipment is built to compare the effects of influencing factors. Based on this platform, the movement of the ball during machining is developed through the use of a kinematic model, and the lapping trajectories on the ball’s surface is simulated. Statistical methods assess and analyze the impact of these factors on the uniformity of the lapping trajectory and the overall enveloping speed, leading to optimized machining parameters. G20-grade GGr15 bearing steel balls are used as test subjects. Following a 10-hour lapping process and a 6-hour polishing process, over 80% of the batch achieves G5-grade quality, characterized by RONt ≤ 0.13&#xa0;μm and Ra ≤ 0.014&#xa0;μm.</p>

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Kinematic analysis and experimental study of miniature balls machining process using an eccentric rotated tri-plates lapping method

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Xun Lv,
  • Li Jiang,
  • Lu Zhao

摘要

In order to ensure that the lapping trajectories can more uniformly and efficiently cover the entire spherical surface during the processing of balls, a precision machining method employing eccentric rotated tri-plates is proposed to satisfy the high precision demands of miniature balls. An experimental equipment is built to compare the effects of influencing factors. Based on this platform, the movement of the ball during machining is developed through the use of a kinematic model, and the lapping trajectories on the ball’s surface is simulated. Statistical methods assess and analyze the impact of these factors on the uniformity of the lapping trajectory and the overall enveloping speed, leading to optimized machining parameters. G20-grade GGr15 bearing steel balls are used as test subjects. Following a 10-hour lapping process and a 6-hour polishing process, over 80% of the batch achieves G5-grade quality, characterized by RONt ≤ 0.13 μm and Ra ≤ 0.014 μm.