镁合金轧制热流体式控温轧辊温度变化规律研究  

Temperature Variation of Internal Oil Flowing Temperature-control Roller for Mg Alloy Rolling

作　　者：范沁红[1] 马立峰[1] 赵镇波 贾伟涛 乐启炽[3] FAN Qinhong;MA Lifeng;ZHAO Zhenbo;JIAWeitao;LE Qichi(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024;China National Heavy Machinery Research Institute Co.,Ltd.,Xi'an 710032;Key Laboratory of Electromagnetic Processing of Materials,Ministry of Education,Northeastern University,Shenyang 110819)

机构地区：[1]太原科技大学机械工程学院,太原030024 [2]中国重型机械研究院股份公司,西安710032 [3]东北大学材料电磁过程研究教育部重点实验室,沈阳110819

出　　处：《机械工程学报》2022年第8期143-152,共10页Journal of Mechanical Engineering

基　　金：国家自然科学基金(U1910213,52105388);山西省应用基础研究计划(201901D211290)资助项目。

摘　　要：镁合金板带轧制过程中轧辊冷却调控是保证板带轧制成形质量的重要环节,轧辊通油调温的方式能很好保证轧辊表面温度均匀性,这对提高板带整板成形质量具有重要的作用。但由于轧辊自身导热系数限制,表面温度针对内部油温变化的响应存在明显的时滞性。在前期镁合金专用轧辊设计及实验室应用基础上,主要通过获得通油轧辊在不同冷却方式和不同冷却油流量下的辊面温度变化规律,为镁合金轧制过程中的轧辊恒温控制提供理论基础。研究结果表明:在不同工况下辊面温度沿轴向分布的趋势相同,表现为从操作侧到传动侧温度递减的显著特征。在获得辊面温降时滞性变化趋势的基础上,利用非线性拟合手段建立了镁合金专用轧辊冷却时滞性量化模型,模型表明辊面温降滞后时间与辊面温度呈二次函数关系。During the process of Mg alloy strip rolling,the cooling of roller is an essential detail to guarantee the shaping quality.The manner of cooling by oil flowing inside the roller can ensure the temperature uniformity of roller surface,which facilitates the formability of the plate.However,due to the limitation of thermal conductivity of the roller itself,there is an obvious time delay in the response of surface temperature to the change of internal oil temperature.Based on the design and application of specific roller for Mg alloy rolling,mainly aims to obtain the temperature variation regularity of roller surface under different cooling manners and flow rates of cooling oil to provide theoretical foundation for the constant temperature control during Mg alloy rolling.The results show that temperature distribution trend along the axial direction on the roller surface is similar and a descending tendency from the operating side to the driving side is considerably exhibited.Based on obtaining the time delay trend of roll surface temperature drop,we establish a quantitative model of cooling time-delay characteristic of the specific roller for Mg alloy by means of nonlinear fitting.The model shows that there is a quadratic function relationship between the temperature drop delay time and the roller surface temperature.

关 键 词：镁合金轧制 导热系数 温度分布均匀性 冷却时滞性 

分 类 号：F407[经济管理—产业经济] O351[理学—流体力学]