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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。
In order to make the mill shape control performance to meet the specifications of the strip material changes, for the continuous rolling of high-grade cold-rolled strip steel six-roller tandem cold rolling mill to take most of the middle technology can be traversing. However, the intermediate roll shifting must make the contact pressure distribution more uneven between the rolls, resulting in a contact pressure spike. During the intermediate roll traversing, both the contact pressure and the traverse resistance between the rolls change with the traversing speed and may cause the contact pressure between the rolls to form a larger pressure spike at the roll end, causing the roll to wear out Uniform and shorten the life of the roll. Through the establishment of the finite element simulation model to obtain the variation law of the contact pressure between rolls during the middle roll traversing through the simulation, the roll shape is optimized, and the method using the asymmetric roll force is proposed to realize the contact pressure between the rolls Uniform distribution, reducing contact pressure spikes between the peak, and to extend the service life of the roll.