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采用显式动态弹塑性有限元法对平板轧制过程进行了模拟计算,得出了整个轧制过程的应力应变场。轧制压力的计算结果与实测值基本相符。 相似文献
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用弹塑性有限元模拟双金属复合板轧制 总被引:1,自引:0,他引:1
应用大型有限元软件ANSYS/LS-DYNA对双金属复合板的轧制过程进行了数值模拟,获得了单位轧制压力的分布情况,并由此计算出双金属复合板的轧制力,模拟结果证实了应用显式动力学弹塑性有限元法模拟双金属复合板轧制的可行性,且计算所得轧制力与实验结果吻合较好。 相似文献
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采用带有不同空芯的铅锭模拟带液芯的连铸坯,在四机架连轧机上平立交替轧制,形成连轧时停止轧制并反转退出轧件,测量各道次的压下、宽展、前滑和芯部的压合值,并计算出各道次的秒流量和延伸系数,借此研究该工艺的可行性及连轧时带液芯轧件的变形情况。研究结果表明:用四机架连轧带液芯铸坯在工艺上、技术上是可行的。连铸坯带液芯连轧时的液芯率应小于20%。最好采用四辊万能轧机或采用凸透镜形状的连铸结晶器,以避免带液芯连轧时出现凹陷变形带。初步确定在所采用轧制条件下可轧合的最大液芯率为10%。 相似文献
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为设计安全合理的合金钢椭圆孔型系统,采用三维热力耦合弹塑性有限元模拟仿真技术,超前再现了合金钢方坯在椭圆孔型中金属的三维流动过程并获得了轧制力及力矩等重要参数的变化规律.结果表明:表面和心部金属沿轧制方向流动速率的不同导致合金钢方坯端部横断面产生凹形;轧制力和轴向力及轧制力矩和径向力矩具有相似的变化趋势,即咬入和抛钢阶段其值变化较大而稳定轧制阶段变化较小. 相似文献
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针对热轧带钢粗轧段大立辊侧压调宽轧制的生产特点,利用ANSYS/LS-DYNA建立立辊三维轧制有限元仿真模型,模拟计算不同工艺条件下轧件的变形规律,重点分析横截面形状(狗骨形)变形特点,以及宽展变形特点,所得结果与现场情况吻合,证明所建模型及计算结果可对现场工艺制定提供指导作用。 相似文献
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主要研究圆孔型作为中间孔轧制方坯时的工艺变形特点,通过圆坯在菱形孔以及菱形轧件在后续方孔中变形规律的仿真分析,并对比方坯在菱形孔的变形特征,认为通过合适的轧制压下分配,利用圆孔作为中间孔轧制方坯在工艺上完全可行,完全可以轧制出满足尺寸要求的方坯成品。这种工艺配置不仅可以有效提高多坯型轧制时的孔型共用性,减少轧辊待机量,而且与常规菱方孔型轧制方坯的工艺相比,新工艺在改善成品角部质量,减少轧辊应力集中,减少轧件鱼尾变形量等方面具有明显的效果。 相似文献
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椭圆孔型张减过程模拟及横向壁厚分布预测 总被引:4,自引:0,他引:4
通过对宝钢钢管厂152.5BO椭圆孔型系统主变形机架生产不同壁厚管子的轧制过程进行三维弹塑性有限元模拟,得出经减径后管子沿圆周方向的壁厚分布不均,产生内多边形的缺陷,随着总减径率和壁厚的增加,引起内多边形的程度增大。根据模拟结果对152.5BO椭圆孔型系生产不同规格的管子引起管子在沿圆周方向的壁厚不均进行预测。 相似文献
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Three passes of plate rolling during vertical-horizontal rolling process are simulated with explicit dynamic finite element method and updating geometric method. The equivalent strain and stress fields, and shape change at the head and tail of slab during rolling are obtained. The calculated result of the shape at the head and tail of slab is in good agreement with the measured one. The explicit dynamic finite element method and updating geometric method can be used effectively to analyze the multipass vertical-horizontal (V-H) rolling process. 相似文献
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Using 3 D elastic plastic FEM, the cold strip rolling process in a 4 high mill was simulated. The elastic deformation of rolls, the plastic deformation of the strip, and the pressure between the work roll and the backup roll were taken into account. The distribution of rolling pressure along the strip width was obtained. Based on the simulation results, the peak value of rolling pressure and the location of the peak were analyzed under different rolling conditions. The effects of the roll bending force and the strip width on the distribution of rolling pressure along the width direction were determined. 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