基于ANSYS的热轧工作辊温度场的有限元分析

根据宝钢1880热轧工作辊实际的边界条件,利用有限元软件ANSYS建立了热轧工作辊的二维温度场有限元模型,通过将模拟结果与现场下机后工作辊表面温度实测数据的比较,验证了模型的可靠性。在此基础上,研究了工作辊表层温度及中心温度的变化过程,模拟结果表明,轧辊旋转一周的过程中,辊面的最高温度可达525℃;每块带钢轧制过程中,辊面的最高温度在轧辊旋转6～8周之后不再增加;整个轧制过程中轧辊中心温度基本保持上升趋势。通过修正现场热凸度补偿模型参数,提高了带钢板形质量,降低了产品的封锁率。

Finite element analysis of temperature fields of work roll in hot rolling mill based on ANSYS

According to the actual boundary condition of work roll in 1880 hot rolling mill at Baosteel,a two dimensional model for simulating the temperature field of work roll was established with ANSYS finite element software,the calculated results were compared and verified with the measured data of roll surface temperature after rolling.On this base,the surface and center temperature evolution of work roll was studied.The results of simulation showed that the surface highest temperature of work roll could reach 525℃ in a revolution,and the surface highest temperature variations reached a steady state condition after about 6～8 revolutions during rolling of a strip,but the center temperature kept increasing in the whole campaign.After modified the parameters of the model of thermal crown compensation,the quality of strip shape was increased,and the close off ratio of products were reduced greatly.