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带钢平整过程中,平整辊表面粗糙度、辊径等工艺参数对带钢表面质量控制有重要的影响。采用有限元法,通过建立不同粗糙度的平整辊模型,对平整工艺进行数值模拟,研究了不同平整参数下复制率的变化规律。结果表明,粗糙度复制率随压下率的增大而增大,随平整速度的增大而减小。同时,在相同压下率并忽略平整前带钢的粗糙度下,在复制率都未达到饱和时,粗糙度复制率随粗糙度增大而减小。摩擦系数的改变对小粗糙度下平整复制的影响更为显著,而大直径辊更容易获得大的平整粗糙度复制率。另外,采用析因法得到压下率和平整辊表面粗糙度是影响平整后带钢表面粗糙度的主要控制因素。研究结果有助于加深对表面粗糙度复制过程的认识并为平整工艺的优化和改进提供理论依据。
In the process of strip flattening, the surface roughness of roll, the roll diameter and other process parameters have an important influence on strip surface quality control. By using the finite element method, a smooth roll model with different roughness was established to simulate the smoothing process and study the variation rule of the replication rate under different flatness parameters. The results show that the roughness replication rate increases with the increase of the reduction rate, decreases with the increase of the flattening velocity. At the same time, under the same reduction rate and neglecting the roughness of the strip before the flattening, the roughness replication rate decreases with the increase of the roughness when the replication rates are not saturated. Changes in the coefficient of friction have a more pronounced effect on smoothing under small roughness, whereas larger diameter rolls can more easily achieve large flatness roughness replicating rates. In addition, using the factorial method to obtain the reduction rate and the surface roughness of the leveling roller are the main control factors that affect the surface roughness of the strip after smoothing. The results of the study will help deepen the understanding of the process of surface roughness replication and provide a theoretical basis for the optimization and improvement of the formation process.