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作 者:瞿海霞[1] 秦晓峰 QU HaiXia;QIN XiaoFeng(Baoshan Iron and Steel Co.,Ltd.,Central Research Institute,Shanghai 201900,China;College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China)
机构地区:[1]宝山钢铁股份有限公司中央研究院,上海201900 [2]太原理工大学机械与运载工程学院,太原030024
出 处:《机械强度》2024年第4期1004-1009,共6页Journal of Mechanical Strength
基 金:轧辊回收关键技术及多基地示范应用研究项目(D20ECES500)资助。
摘 要:轧辊作为带钢生产轧机的核心部件,其消耗对生产成本有重要影响。随着钢铁企业竞争加剧导致的降本增效需求逐步提高,轧辊再制造循环利用得到逐步推广。大型轧机大尺寸轧辊工作层消耗后改造用于小轧机为其中主要方式之一;对于局部尺寸尤其是辊肩尺寸不足的轧辊通常采用铸接方式加长以满足进一步使用的需求;铸接再制造后轧辊的使用寿命成为保障安全生产的关键。针对上述问题,在轧辊铸接部位取样开展了疲劳性能测试,同时选用扭转疲劳模型在证明计算精度的基础上,结合基于现场生产数据建立的载荷谱,对工作辊修复后的辊颈进行了寿命预测,预期服役寿命满足现场对修复后轧辊的性能需求,可为现场轧辊安全使用维护制度建立提供理论支撑。As the core component of strip mills,roll consumption has an essential influence on the production cost.With the increasing demand for cost reduction and efficiency increase caused by the intensifying competition of iron and steel enterprises,the recycling of roll re-manufacturing has been gradually promoted.It is one of the main ways to transform the largesize roll of the large rolling mill to a small rolling mill after its work layer consumption.For rolls with local size,especially those with insufficient shoulder size,casting lengthening is usually adopted to meet the needs of further use.The service life of the roll after casting joint repair and re-manufacturing becomes the key to ensuring safe production.Because of the above problems,the fatigue performance test was carried out on the roll casting part sample.At the same time,the torsional fatigue model was used to predict the life of the roll neck after the repair of the work roll based on proving the calculation accuracy and combining it with the load spectrum established based on the field production data.The expected service life met the performance requirements of the repaired roll on the site.It can provide theoretical support for establishing an on-site roll safety maintenance system.
关 键 词:轧辊再制造 铸接 工作辊 扭转疲劳试验 寿命预测
分 类 号:TH12[机械工程—机械设计及理论]
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