横向不均匀润滑轧制理论

Rolling theory with transverse uneven lubrication

针对轧辊轴向不均匀磨损及由此带来的板形控制问题,建立了三维弹塑性动态辊系模型,分析了辊件间接触状态及其与轧辊轴向磨损分布间的关系,并由此提出了横向不均匀润滑轧制理论.仿真结果表明,通过改变辊件间横向摩擦因数分布,在保证带钢质量的前提下,实现了辊件间接触压力及摩擦力分布的均匀化,从理论上验证了横向不均匀润滑在改善辊件间接触状态方面起到的积极作用.最后,对横向不均匀润滑轧制理论的可行性进行了分析.

Due to the axial uneven wear of rolls and the problem of shape control brought by uneven wear, a three-dimensional elastoplastic dynamic finite element model of the roll system with a strip was built. The contact state between the roils and the strip was analyzed. The relation between the contact state and the distribution of wear along the axis of the rolls was theoretically analyzed, on the basis of which the rolling theory with transverse uneven lubrication was provided. Simulation results show that under the premise of guaranteeing strip quality, the distributions of rolling force and friction force between the rolls and the strip are homogenized obviously by changing the transverse friction coefficient between the rolls and the strip. It is proved that transverse uneven lubrication has positive effect on the contact state between the rolls and the strip. Finally, the feasibility of the rolling theory with transverse uneven lubrication was discussed.