Multi-objective optimization of rolling schedule based on cost function for tandem cold mill

In terms of tandem cold mill productivity and product quality, a multi-objective optimization model of rolling schedule based on cost fimction was proposed to determine the stand reductions, inter-stand tensions and rolling speeds for a specified product. The proposed schedule optimization model consists of several single cost fi.mctions, which take rolling force, motor power, inter-stand tension and stand reduction into consideration. The cost function, which can evaluate how far the rolling parameters are from the ideal values, was minimized using the Nelder-Mead simplex method. The proposed rolling schedule optimization method has been applied successfully to the 5-stand tandem cold mill in Tangsteel, and the results from a case study show that the proposed method is superior to those based on empirical formulae.     

唐钢1 800 mm 5机架冷连轧机过程控制模型设定系统

简要介绍了唐钢1 800 mm 5机架冷连轧机组的工艺参数、仪表配置及过程控制模型设定系统。从轧制过 程在线数学模型、基于成本函数的多目标优化负荷分配和模型自适应3个方面对该冷连轧过程控制模型设定系统 进行了深入分析研究。现场应用表明,该L2过程控制系统运行稳定,模型设定系统制定的轧制规程合理、模型设 定计算具有非常高的精度,满足在线控制的要求。