According to the concept of virtual bending force,a rational explanation for SHOHET's model was presented. Considering the deformation characters of the work rolls in four-high mill,the deformation model of the wo...According to the concept of virtual bending force,a rational explanation for SHOHET's model was presented. Considering the deformation characters of the work rolls in four-high mill,the deformation model of the work roll was regarded as a cantilever beam and new influence coefficients were deduced.The effect of the bending force was taken into account independently. Therefore,the contribution to work roll deflection caused by rolling load,rolling pressure between rolls and bending force can be got from the new formulas.To validate the accuracy of the formulas,the results obtained from the new formulas were compared with those from SHOHET's formulas.It is found that they highly coincide,which illustrates that the formulas are reliable.展开更多
针对铝板带冷轧过程中弯辊力的预设定问题,采用非线性有限元仿真软件ABAQUS建立了辊系的三维弹塑性有限元模型和工作辊的热凸度模型,通过改变模型的边界条件进行有限元求解,分析了板带轧制过程中弯辊力变化对辊系的弹塑性变形影响以及...针对铝板带冷轧过程中弯辊力的预设定问题,采用非线性有限元仿真软件ABAQUS建立了辊系的三维弹塑性有限元模型和工作辊的热凸度模型,通过改变模型的边界条件进行有限元求解,分析了板带轧制过程中弯辊力变化对辊系的弹塑性变形影响以及工作辊的热变形特征,并将模拟结果与某厂生产现场采集的数据进行比较。结果表明弯辊力对板形对称缺陷的改善效果明显,并得出弯辊力的最佳设定值约为300 k N;分段冷却使工作辊热凸度减小了约25μm;二者配合使用使工作辊横向承载辊缝值分布趋于均匀,板带板形趋于良好。展开更多
基金Project(20050216007) supported by the Specialized Research Fund for the Doctoral Program of Higher Education of China
文摘According to the concept of virtual bending force,a rational explanation for SHOHET's model was presented. Considering the deformation characters of the work rolls in four-high mill,the deformation model of the work roll was regarded as a cantilever beam and new influence coefficients were deduced.The effect of the bending force was taken into account independently. Therefore,the contribution to work roll deflection caused by rolling load,rolling pressure between rolls and bending force can be got from the new formulas.To validate the accuracy of the formulas,the results obtained from the new formulas were compared with those from SHOHET's formulas.It is found that they highly coincide,which illustrates that the formulas are reliable.
文摘针对铝板带冷轧过程中弯辊力的预设定问题,采用非线性有限元仿真软件ABAQUS建立了辊系的三维弹塑性有限元模型和工作辊的热凸度模型,通过改变模型的边界条件进行有限元求解,分析了板带轧制过程中弯辊力变化对辊系的弹塑性变形影响以及工作辊的热变形特征,并将模拟结果与某厂生产现场采集的数据进行比较。结果表明弯辊力对板形对称缺陷的改善效果明显,并得出弯辊力的最佳设定值约为300 k N;分段冷却使工作辊热凸度减小了约25μm;二者配合使用使工作辊横向承载辊缝值分布趋于均匀,板带板形趋于良好。
