共查询到18条相似文献,搜索用时 405 毫秒
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短行程控制是热轧粗轧调宽过程中改善带钢端部形状、减少成材率损失的主要方法,而宝钢某热轧机组采用的传统的折线式短行程控制效果较差。采用刚塑性有限元法建立了立轧/平轧三维热应力耦合有限元模型,对粗轧机组轧制过程进行了全过程模拟,模拟结果得到实物验证。根据有限元模拟得到的带钢头尾失宽曲线,运用多项式插值原理,建立了短行程多项式模型,实际使用后提高了轧线成材率。 相似文献
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运用热轧粗轧短行程控制的原理,提出了将头尾控制曲线由3点折线改为二次多项式连续曲线方法,使基础自动化可以跟踪短行程长度方向上任意一点的立辊开度,从而极大地改善了粗轧带钢的头尾形状。 相似文献
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热轧产品宽度精度是影响带钢质量最重要的指标之一,其直接影响到成材率与后续用户的钢材利用率。热轧产线中的生产原料来自于连铸,由于在连铸阶段,宽度影响因素多,经常会出现楔形坯(T型坯)。为了加强对粗轧楔形坯宽度的精度控制,提出了一种楔形坯的宽度控制方法,通过在R1机架立辊轧制时采用长行程与短行程结合,保证整体带钢宽度的均匀性。 相似文献
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热轧板厂立辊采用短行程控制技术对热轧板材进行头尾宽度控制,通过对立辊轧制时的头尾辊缝进行调整来改善头尾形状,从而提高成材率。辊缝的调整主要是通过L1的跟踪执行、L2的模型计算及操作工微调步骤三个方面来实现。 相似文献
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Zang Xin-Liang LI Xue-Tong 《钢铁研究学报(英文版)》2009,16(5):35-42
Using 3D rigid-plastic finite element method (FEM), a numerical simulation model for the non-steady state vertical- horizontal rolling process in roughing trains has been built, and is validated by comparison between simulated and experimental values of width and shape of the stock ends. Aiming to certain 2050 roughing process technologies, short shape control (SSC) of the stock ends was investigated using the model. Based on the simulated results, a new SSC model was developed. Moreover, it can be seen that it is effective for the new SSC model to improve shape of the stock ends from the analyzed results. 相似文献
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Using 3D rigid-plastic finite element method (FEM), a numerical simulation model for nonsteady state vertical-horizontal rolling process in roughing trains was built and was validated by comparing the simulated values with experimental ones of width and shape of the stock ends. According to certain 2050 roughing processing technologies, the short shape control (SSC) of the stock ends was investigated using the model. Based on the simulated. results, a new SSC model was developed. The analyzed results showed that the new SSC model is effective in improving the shape of the stock ends. 相似文献
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Optimization of Short Stroke Control Preset for Automatic Width Control of Hot Rolling Mill 总被引:1,自引:1,他引:0
Automatic width control is a key issue in hot strip rolling. The edge rolling has been widely used in the roughing stand of hot strip mill to control the width of the slab. However, the edge rolling and consequent horizontal rolling will cause a significant width change in the head part and tail part of the slab, which have to be trimmed before the finishing stands. Based on the width reduction deformation curve of the head and tail along the longitudinal direction of slab, the short stroke control technology has been developed to overcome this problem. In this paper, the finite element method has been used to simulate the unsteady edge rolling process. Three short stroke control curves have been compared in order to obtain the best width control result. The optimized short stroke control curve has been applied to the automatic width control system of industrial hot rolling mill, and good performance is obtained. 相似文献
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