六辊冷连轧机中间辊横移过程辊间接触压力分析

 为了使轧机板形控制性能适应带钢规格材质变化，用于连续轧制高档冷轧薄带钢的六辊冷连轧机大都采取中间辊可横移技术。但是，中间辊横移必定使辊间接触压力分布更不均匀，导致出现接触压力尖峰。在中间辊横移过程中，辊间接触压力和横移阻力都会随横移速度的变化而发生改变，并可能导致辊间接触压力在轧辊端部形成更大的压力尖峰，从而造成轧辊磨损不均匀并缩短轧辊的使用周期。通过建立有限元仿真模型，以仿真模拟获得中间辊横移过程中辊间接触压力的变化规律后，优化设计轧辊辊形，并且提出使用非对称弯辊力的方法，实现了辊间接触压力的分布均匀化，降低了辊间接触压力尖峰值，并延长了轧辊的使用寿命。

Analysis of contact pressure between rolls during intermediate roll shifting in 6-high cold rolling mills

For high-grade cold-rolled steel strip continuous rolling six-high cold rolling mill,in order to make the strip flatness control performance to adapt to changes in material specifications,most of the intermediate rolls adapt the traverse technology.However,intermediate roll shift will make the contact pressure distribution between rolls more uneven,resulting in a contact pressure peak.During the roll shift process,the contact pressure between the rollers and the sliding resistance will change with the change of traverse speed,and may result in the contact pressure between rolls at the ends of the roll to form a larger pressure peak,wearing the rolls unevenly and shortening the life cycle of the roll.In the current study,a finite element simulation model was built to obtain the variation of contact pressure between rolls during the process of the intermediate roller traversing.The optimization design of roll shape and the use of asymmetric bending force method were proposed to achieve a uniform distribution of the inter-roll contact,reduce the contact pressure peak between rolls,and extend the service life of the roll.