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<p>In high-speed and heavy-load scenarios, the uneven contact pressure distribution among the backing bearings of the support rolls in a twenty-roll mill often results in localized fatigue failures. This study employed ABAQUS software to simulate the contact pressure distribution between the support rolls and the second intermediate rolls. Utilizing Hertz's and McEwen's formulas, the internal stress distribution across the contact surfaces of the backing bearings was determined, along with an assessment of their fatigue life and current fatigue status. Findings revealed significant fatigue disparities among backing bearings on the same support roll. Aiming for a uniform fatigue distribution, a novel strategy for the arrangement of backing bearings was developed. Post-implementation of this strategy, fatigue uniformity among the bearings improved, and the operational life of each backing bearing increased by 1000&#xa0;km, with the number of machines uses rising from 8 to 9. Field application of these findings not only enhanced the operational lifespan of the backing bearings but also maintained production stability. Additionally, the rolling mill roll health assessment system developed in this study enables real-time monitoring of roll contact stress and backing bearing calculated fatigue damages, offering valuable technical guidance to on-site staff.</p>

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Research on Fatigue Distribution and Roll Matching Strategy of Backing Bearing of Twenty-High Rolling Mill

  • 期刊论文

  • 发表日期：

    2025年3月10日

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  • Qiang Guo,
  • Yang Liu,
  • Wenquan Sun,
  • Tieheng Yuan,
  • Zhangyu Wu,
  • Anrui He,
  • Chao Liu

摘要

In high-speed and heavy-load scenarios, the uneven contact pressure distribution among the backing bearings of the support rolls in a twenty-roll mill often results in localized fatigue failures. This study employed ABAQUS software to simulate the contact pressure distribution between the support rolls and the second intermediate rolls. Utilizing Hertz's and McEwen's formulas, the internal stress distribution across the contact surfaces of the backing bearings was determined, along with an assessment of their fatigue life and current fatigue status. Findings revealed significant fatigue disparities among backing bearings on the same support roll. Aiming for a uniform fatigue distribution, a novel strategy for the arrangement of backing bearings was developed. Post-implementation of this strategy, fatigue uniformity among the bearings improved, and the operational life of each backing bearing increased by 1000 km, with the number of machines uses rising from 8 to 9. Field application of these findings not only enhanced the operational lifespan of the backing bearings but also maintained production stability. Additionally, the rolling mill roll health assessment system developed in this study enables real-time monitoring of roll contact stress and backing bearing calculated fatigue damages, offering valuable technical guidance to on-site staff.