梅钢热轧支持辊辊形遗传算法设计与极限规格板形改善

Design of Backup Roll Profile With Genetic Algorithm to Improve Strip Flatness in Meisteel

为了解决梅钢1422热连轧机组在产品规格品种扩大后生产极限规格带钢存在的板形问题,对梅钢热轧支持辊的初始辊形进行了研究,提出了函数化的新支持辊辊形优化设计原则,建立了辊系变形计算采用二维变厚度程序且优化计算选用遗传算法的支持辊辊形设计方法、模型和相应软件系统,实现了热轧支持辊初始辊形曲线自动寻优设计,并为对象机组设计出仿真计算表明综合板形调控性能优良的新辊形,实现了上机应用并在长期稳定使用中获得明显改善机组出口极限规格带钢的板形和使支持辊及工作辊磨损情况显著改善的生产实绩。

In order to resolve the flatness problems of extreme size strip in Meisteel 1422 tandem hot mill after the enlargement of sizes and steel grades, the initial profile of hot mill backup roll were researched, and the functional design principles of new backup roll profile optimization were proposed; on the basis of these design principles, the genetic algorithm backup roll profile design platform was established which used two-dimension PEM with variable thickness to calculate roll system deformation, the automatic optimization of roll profile curve was realized, and the design method of hot mill backup roll initial profile was perfected; According to simulation verified the improvement effect of new profile on aspect of flatness control efficiency, and applied to the production, practice results show that the new backup roll profile has obviously improved the flatness of extreme size strip at the unit exit, at the same time the wearing of backup and work roll has large improvement.