轧制工艺参数对钢板平面形状的影响

利用有限元法计算软件ANSYS/LS DYNA,对不同工艺参数的立辊轧边、展宽轧制及精轧的中厚板生产过程进行了模拟计算·由模拟计算知,随立辊侧压量增大,展宽轧制后板坯前端由凸鼓形向凹鼓形变化,后端始终为凸鼓形,展宽轧制后轧件切头尾长度及宽度波动量先减小后增加,精轧后轧件宽度波动变化与展宽轧制时相似·展宽比大时,立辊轧边对减少宽度波动量效果较好;要得到好的轧后平面形状,应使展宽轧制后的钢板边部保持平直或微凸·模拟计算结果为合理匹配立辊侧压量、展宽比及精轧延伸率,提供了理论参考·

Effect of Rolling Parameters on Plane Shape of Plates

An analog computation was carried out with the FEM software ANSYS-DYNA for the edge, spread and finish rolling processes of thick/medium plates which were rolled with different rolling parameters. The results showed that after spread rolling the front end of slab plane changes to dishing from bulging with increasing edge reduction but its back end always keep the slab plane in bulging form, and the length and width fluctuations of both front and back end crops of the slab is similar to that after spread rolling. Less width fluctuation is available via edge rolling if the proportional spread is big. In order to get a favorable plane shape of plates after the whole rolling process, both the longitudinal edges of the slab after spread rolling shall be kept in straight or slightly convex. The results of analog computation thus provide a theoretic reference to matching rationally the edge reduction, proportional spread and percentage elongation in finish rolling.