热轧带钢变行程窜辊策略优化模型

Optimization Model for Roll Shifting Strategy With Varying Stroke in Hot Strip Mill

提出一个用于常规平辊的窜辊策略优化模型,能针对不同轧制计划,求解优化的变行程窜辊策略。通过仿真分析得到传统窜辊策略的参数选取原则;提出一种变行程窜辊策略生成算法,确定4个窜辊参数与窜辊策略的映射关系;建立综合考虑猫耳高度与辊面磨损宽度2个轧辊磨损特征参数的优化目标函数。采用结合启发式规则的PSO算法求解,获得优化的变行程窜辊参数。工业生产验证了模型的有效性,优化后的变行程窜辊策略能显著改善带钢板形质量和带钢断面形状,延长轧制公里数。

An optimization model of shifting strategy with varying stroke for conventional flat work rolls was presented,and it could solve the optimal roll shifting strategy for specific rolling campaign.First,selection principle of control parameters in conventional shifting strategy was gained by simulation analysis.And then,a generation algorithm of shifting strategy with varying stroke was proposed.It decided mapping relationship between four shifting control parameters and roll shifting strategy for a roll campaign.The objective function was set up by characteristic parameters of roll wear,namely cat ear height and the width of roll surface wear.Finally,the PSO algorithm combining with heuristic rules of shifting strategy was used to solve the optimal solution of shifting strategy.Industrial production verifies the validity of the model.The optimal shifting strategy with varying stroke can significantly improves the quality of strip flatness and profile,extending rolling miles of a roll campaign.