共查询到18条相似文献,搜索用时 109 毫秒
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影响(微)张力减径机轧制能力的因素主要包括:单机架减径率、单机架变形量、轧制荒管规格、轧制温度、 轧制速度、机架间张力等。主要研究分析在单机架减径率及变形量确定的情况下,机架间张力对轧制负荷的影响, 以指导实际生产过程中如何利用张力的变化来控制减径轧制在正常负荷下的运行。结果表明:平均张力系数Zm 越大,减径轧制时各机架的轧制负荷越大;平均张力系数Zm不变,各机架的轧制负荷随机架间张力增大而增大。 相似文献
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张力减径机不同孔型横向壁厚分布的有限元模拟分析 总被引:7,自引:0,他引:7
借助有限元分析软件模拟钢管张力减径的轧制过程,由3种不同张力减径机孔型轧制的同一规格钢管产品的横向壁厚分布的比较表明,采用宝钢专有技术设计的新孔型轧制的钢管与原有的德国传统孔型轧制的钢管相比,其横向壁厚较为均匀,并对钢管"辊印"缺馅的产生有抑制作用. 相似文献
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《Baosteel Technical Research》2010,(Z1):66
According to the characteristics of PQF continuous rolling pass,the relationship between spread coefficient,wall thickness coefficient and elongation are analyzed.The section shape of tube in each stand outlet,the efficient working radius and the rotational speed of each roll are obtained,therefore,the pass parametric design is completed.A thermal-mechanical coupled model of continuous rolling tube’ s forming process is established by the three-dimensional elasto-plastic finite element method,the section shape and area of tube in each stand outlet are forecasted,which is used to modify the pass.The rolling force of each roller is predict too,which provides a guidance for pass design.In addition,a visual software of PQF pass parametric design system on heavy calibre seamless tube is generated with Visual Basic.The forming dimension of tube and the rolling force of each roller are successfully obtained,by simulating the forming process of a certain series heavy calibre seamless tube.This system posses practical utilization value.By using this system,the development cycle of new product can be shortened,the reliability of pass design can be improved,and the energy consumption of rolling mill and production cost can be decreased. 相似文献
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《钢铁研究学报(英文版)》2015,(10)
The tube rotation method(TRM) refers to the rotational movement of steel tube about its axis as well as translation in rolling direction in stretch reducing rolling process.The influence of the TRM on transverse wall thickness precision of seamless steel tube was studied.Thickness distribution of the TRM was obtained by superimposing the thickened amount of single pass rolling.Results show that the TRM can effectively improve the evenness of thickness distribution.In order to analyze the influence mechanism of the TRM,the finite element method was adopted to simulate the thickness distribution in stretch reduction process.Results show that the TRM changes the roundtrip flow between two fix places of conventional stretch reducing and inhibits the directional accumulation of metal.In addition,the TRM has a correction effect on thickness cusp.All these advantages of the TRM help to improve the transverse wall thickness precision of seamless steel tube. 相似文献
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利用有限元模拟软件DEFORM-3D对异型钛材的多道次轧制成形过程进行数值模拟,研究了坯料形状、孔型侧斜度以及轧辊间距对TA2纯钛异型材轧制过程及成品的影响。结果表明,圆形坯料有利于保证轧制过程中的稳定性,较大的侧斜度有利于提高变形的均匀性,而增大轧辊间距会导致轧件宽展相应减小。总之,借助计算机模拟异型钛材的轧制生产过程,可以优化坯料形状、完善孔型设计、制定轧制工艺,特别是在异型钛材新产品开发中,对于缩减产品研发时间,降低生产成本,提高轧制效率具有重要意义。 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