1700热连轧机轧辊温度场及热凸度研究

研究了国内某1700热连轧机轧辊温度场有限差分模型及热凸度模型,采用C++语言编制离线仿真程序,计算某一轧制周期工作辊温度场及热凸度,得到轧制过程不同时刻工作辊表面温度及热变形情况.F2,F3和F4轧辊上表面在轧制结束后最高温度分别为58.1,73.1和81.2℃;表面最大变形量(半径方向)分别为193.979,275.259和333.433μm.对CVC轧辊而言,轧辊表面温度分布及热变形变化明显受到轧辊横移的影响.将程序计算得到的轧辊表面温度与实测值比较,两者吻合较好,表明轧辊温度场模型及热凸度模型具有较高的计算精度.

Temperature Field and Thermal Crown of Work Rolls on 1700 Hot Strip Mill

The FDM (finite difference method) model of temperature field and thermal crown of work roll on 1700 hot strip mill (HSM) was studied. The off-line simulation program was compiled by C++ language and the temperature field and thermal crown were calculated according to the rolling schedule, thus obtaining roll surface temperature and thermal deformation at different moments. The maximum surface temperatures of the work rolls F2, F3 and F4 are about 58.1, 73.1 and 81.2°C and relevant maximum radial deformations are about 193.979, 275.259 and 333.433 μm respectively. The surface temperature distribution and thermal deformation were both affected obviously by roll shift. The computed and measured roll surface temperature were comparatively in good agreement with each other, and the fact showed that the computed roll temperature field and thermal crown model are quite accurate.