钢锭楔形轧制法在特厚板宽度控制中的应用

Application of ingot wedge rolling method in ultra-heavy plate width control

在钢锭轧制特厚板生产中,为了解决展宽轧制中头尾锥度产生的宽度偏差,提出了楔形轧制技术.通过分析不同展宽比条件下的宽展变化规律及横向流动因子与展宽系数的关系,计算立辊消锥度轧制后沿着长度方向上各个点的狗骨回展量以及自由宽展量,计算边部鼓形宽度形状函数并建立摺叠深度函数,根据边部摺叠量建立头尾目标宽度相等条件下的轧件楔形度模型,并用实时反馈主电机实际速度和轧制过程中实时计算的前滑率,建立轧制过程中的微跟踪模型.实际应用结果表明,应用该方法产品成材率可提高3%～4%,具有良好的应用价值.

In order to solve width deviation caused by ultra-heavy plate from ingot, a wedge roiling method head to tail taper in spread rolling in the production of making was proposed. An analysis was also conducted on the width variations rules on different spread ratio conditions as well as relationships between lateral flow factor and spread co- efficients. This paper calculated each point dog-bone recovery spread and unrestricted spread along length direction after vertical roll removing taper, established edge double-drum width form function and built a plate margin folding function. Next, a work piece wedge model was built based on equivalent head and tail spread conditions, folding a- mounts, main motor practicable speed feedback, continuous forward slip ratio calculations, and the construction of a micro-trace model in rolling process. Practical applications showed that the method proposed could improve the product rolling yields by 3%～4% and worthy to apply to plate rolling.