Various kinds of base oils were applied to cold rolling aluminum strips on a test mill for evaluationof the influences of these base oils,aromatics contents and viscosity of base oils on their lubricating performances...Various kinds of base oils were applied to cold rolling aluminum strips on a test mill for evaluationof the influences of these base oils,aromatics contents and viscosity of base oils on their lubricating performances and surface reflectivity of rolled strips at annealing. Results showed that low friction coefficient androlling force were obtained by using the normal paraffins,whereas their contaminations on the annealed stripsurface were the same as those of other saturated hydrocarbons. Aromatics in base oil affected the stir face reflectivity of annealed strips, but the decrease of aromatics in base oil was ineffective to improve rolled stripssurface quality when it is less than 1 %. Base oil viscosity has the great influences on the lubricating performances and surface reflectivity of annealed strips just in this condition.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
文摘Various kinds of base oils were applied to cold rolling aluminum strips on a test mill for evaluationof the influences of these base oils,aromatics contents and viscosity of base oils on their lubricating performances and surface reflectivity of rolled strips at annealing. Results showed that low friction coefficient androlling force were obtained by using the normal paraffins,whereas their contaminations on the annealed stripsurface were the same as those of other saturated hydrocarbons. Aromatics in base oil affected the stir face reflectivity of annealed strips, but the decrease of aromatics in base oil was ineffective to improve rolled stripssurface quality when it is less than 1 %. Base oil viscosity has the great influences on the lubricating performances and surface reflectivity of annealed strips just in this condition.
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。
