新型电磁调控轧机弯辊辊型电磁补偿及初始辊缝

 为解决薄带轧制过程中的各类板形问题,以新型电磁调控轧机为研究对象,利用Marc建立三维热-力耦合有限元模型,分析了弯辊和电磁调控轧辊综合作用下弯辊力和轧制力对轧辊辊型状态、板形分布、板坯边部应力、辊间接触应力、承载辊缝形状的影响规律。结果表明,弯辊机制的施加将直接促进电磁调控轧辊的稳定胀形,使电磁调控轧辊胀形凸度得到整体性补偿,并以板形良好为依据,给出新型调控轧机合理的弯辊力施加范围。对比分析了不同弯辊力和轧制力下辊缝函数的变化情况,形成不同的二次、四次凸度,为板形控制及初始辊缝设定提供依据。

Electromagnetic compensation and initial roll gap under new type of electromagnetic control rolling mill bending roll

In order to solve various flatness problems in the process of thin strip rolling,a new type of electromagnetic control rolling mill was used as the research object, and a three-dimensional thermal-mechanical coupling finite element model was established by Marc, and the bending force under the combined action of the bending roll and the electromagnetic control roll was analyzed. And the rolling force affected the roll shape state, plate shape distribution, slab edge stress, roller contact stress, and bearing roll gap shape.The results show that the application of the roll bending mechanism will directly promote the stable bulging of the electromagnetically controlled rolls,and the bulging crown of the electromagnetically controlled rolls will be compensated integrally. Based on the good shape of the plate,a reasonable bending roll for the new electromagnetically controlled rolling mill is given. Comparing the changes of roll gap functions with different bending forces and rolling forces,different secondary and fourth crowns are formed,which provides a basis for shape control and initial roll gap settings.