电磁调控轧辊的热力胀形行为及高效控制方法
Thermal-Force Bulging Behavior and Efficient Control Method of Electromagnetic Control Roll
杨庭松 1黄敦亮 1孙文权 1何安瑞1
作者信息
- 1. 北京科技大学 高效轧制国家工程研究中心,北京 100083
- 折叠
摘要
为研究辊形电磁调控技术(roll profile electromagnetic control technology,RPECT)的热力胀形行为,采用有限元方法分析了不同电流密度及频率下综合辊凸度、热力贡献辊凸度以及力凸度占比等随接触区热量的变化规律,探究了接触区热量与热力胀形能力的映射关系及其成立条件.结果表明,在接触区热量的中低取值范围内,同一接触区热量所对应的热力调控能力不会受磁参数影响,故提出将接触区热量作为输入参数与调控能力之间桥梁的RPECT高效控制策略.该策略通过提升磁参数来快速达到接触区的目标温升效果,进而获取目标调控能力.以20 μm的辊缝凸度需求为例,经原始与高效控制策略间的对比发现,新策略的调控时间可有效地缩短至原调控时间的19.57%.
Abstract
To study the thermal-force bulging behavior of roll profile electromagnetic control technology(RPECT),the variation laws of the comprehensive roll crown,the thermal-force contribution roll crown and the ratio of the force crown with the heat of contact zone under different current densities and frequencies were analyzed by finite element method,and the mapping relationship and establishment condition between the heat of contact zone and the thermal-force bulging ability were explored.The results show that,within the range of the middle and low values of the heat of contact zone,the thermal-force control ability corresponding to the same value of the heat of contact zone cannot be affected by the magnetic parameters.Therefore,an efficient control strategy of RPECT can be proposed,which takes the heat of contact zone as the bridge value between the input parameter and the control ability.The strategy can quickly achieve the target temperature rise effect of the contact zone by increasing the magnetic parameters,and then obtain the target control ability.Taking the roll gap crown requirement of 20 μm as an example,the comparison between the original and the efficient control strategy shows that the control time of the new strategy can be effectively shortened to 19.57%of the original control time.
关键词
辊形电磁调控技术/热力胀形行为/接触区热量/调控能力/高效控制策略Key words
roll profile electromagnetic control technology/thermal-force bulging behavior/heat of the contact zone/control ability/efficient control strategy引用本文复制引用
基金项目
河北省自然科学基金资助项目(E2021203129)
出版年
2024
NETL
NSTL
万方数据