【摘要】 根据现场的复杂工况,将轧辊辊身分为辊颈、辊端、辊肩、轧制区和非轧制区,综合考虑分段冷却、支撑辊、摩擦热和变形热等因素的影响,建立符合实际的边界条件,并根据热平衡原理建立了工作辊温度场数学模型。在宝钢1580热轧机上进行实验,详细分析了热凸度的瞬态变化以及热凸度在每块带钢轧制前后的变化,对热凸度间断的原因进行了分析,模型计算值和实测值吻合较好,表明模型工程实用性较强,为轧辊热变形的在线预报和控制提供了一定的依据。更多还原

【Abstract】 The complex working conditions of the field were analysed, and the roll body was divided into roll neck, roll end, roll shoulder, rolling area and non-rolling area. The influence factors, such as the segmented cooling, the back-up roll, the friction heat and the deformation heat and etc. were synthetically considered, and the boundary conditions that agree with the practice were constructed, then a mathematical model of work roll temperature field was established based on thermal equilibrium principles. Through the experiments completed in the Bao Steel 1580 hot mill, the transient variation and the variations before and after each strip rolled of the thermal camber were analysed in detail, and the reasons for the discontinuity of thermal camber were accurately analysed. The calculation values coincide better with the measured ones, and good effects are obtained. It indicates that the model has better engineering practicability, and provides important basis for on-line prediction and control of the roll thermal deformation.更多还原