共查询到19条相似文献,搜索用时 78 毫秒
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对轧件切分轧制过程中的变形进行了实验研究。较为详细地介绍了连铸板坯切分、窄板坯的立轧、预对中孔型轧制及成品孔型实验的轧制变形的结果及分析 相似文献
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为稳定小规格带肋钢筋的三线切分轧制 ,对涉及棒材张开角的切分孔孔型诸角度进行了分析 ,通过对轧件受力状态的讨论 ,提出了诸因素与棒材张开角之间的解析式 ,指出满足三线切分稳定轧制时的棒材张开角应为 2°~ 3°,相应的孔型切分角为 30°左右 ,孔型外侧壁倾角应在 4 5°~ 5 0°之间 ,咬入角可控制在 7°~ 8°之间等。 相似文献
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辊切切分过程最佳预切分孔型设计的研究 总被引:1,自引:0,他引:1
辊切切分轧件时,产生的水平分力必须使轧件弯曲,保证切分轧件与轧件弯曲同步进行。就预切分道次后连体软件的断面开头,也就是对预切道次的最佳孔型设计进行探讨。目的在于满足生产需要,保证在生产过程中能够顺利完成将轧件切分开,另外从节能省力的角度,了要选择合理的孔型断面开头。 相似文献
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本文分析了简单孔型中轧地,轧件头部金属质点非稳定流动的规律,提出了判别轧件头部变形凹凸趋势的方法,以箱形-圆-六角-方孔型系统为例,提出了多道次轧制后轧件头部形状的形式。有关预测结果得到了实际轧制过程的证明。 相似文献
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LUODe-xing CHENQi-an LIULi-wen 《钢铁研究学报(英文版)》2005,12(1):17-21
Theeffectofrollradiusonrollingforcehasbeenstudiedlargely ,buttheeffectofrollradiusondeforma tionofrollingpieceandontexturewasmentionedlit tle[1] .Therollradiusmayhaveaspecialinfluenceonthedeformationofrollingpiecebyaffectingtheformofdeformationzoneandaddi… 相似文献
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通过对辊系变形的模拟,分析了轧制条件下对工作辊弯曲变形、支撑辊弯曲变形及接触应力的影响,借助大型有限元分析软件ANSYS的手段,对辊系进行了弹性力学结构分析,得出了在轧制过程中辊系的变形情况及载荷分布等详细直观的分析结果。 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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Peng WANG Xiang-huai DONG Li-jun FU 《钢铁研究学报(英文版)》2009,16(5):23-28
The one-step finite element method (FEM), based on plastic deformation theory, has been widely used to simulate sheet metal forming processes, but its application in bulk metal forming simulation has been seldom investigated, because of the complexity involved. In this paper, a bulk metal forming process is analyzed by using a rapid finite element simulation method based on deformation theory. The material is assumed to be rigid-plastic, strain hardening. The constitutive relationship between stress and total strain is adopted, whereas the incompressible condition is enforced by penalty function. The geometrical non-linearity in large plastic deformation is taken into consideration. Furthermore, the force boundary condition is treated by a simplified equivalent approach, considering the contact history. Based on constraint variational principle, the deformation finite element method is proposed. The one-step forward simulation of axisymmetric upsetting process is performed by this method. The results are compared with those obtained by the traditional incremental FEM to verify the feasibility of the proposed method. 相似文献
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A simulation model for two-roll cross wedge rolling (CWR) was presented by using three-dimensional rigid-plastic finite element method (FEM).The whole forming process of CWR,including knifing zone,guiding zone,stretching zone,and sizing zone,was simulated using the model in which dynamic adaptive remeshing technology for tetrahedral solid elements was used to fix element distortion.Based on the simulation results,the distributions of metal flow field,strain field,and damage field,and the geometry of the workpiece's end were analyzed.These results could provide theoretical guidance for realizing net shaping and reasonable design of tools. 相似文献
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To reveal the basic deformation mechanisms under the conditions of high friction, small reduction, and long contact length in thin strip temper rolling process, an elastoplastic finite element analysis of plane strain upsetting was made based on the FEM software Marc. The results indicated that a near flat ‘zero reduction’ region was present in the center of the contact arc. The simulation results about the effect of rolling parameters on the central flat region showed that any change of increasing the rolling force could result in or enlarge the central flat region in the deformation zone. Stress distribution results illustrated that the metal was in triaxial compression state. Although the maximum and minimum principal stresses were all much larger than the yield stress of the strip, the equivalent stress became lower than that, and no further plastic strain, even a small elastic spring back occurred in the central flat region. That was the problem of ‘hydrostatic pressure’ in thin strip temper rolling. 相似文献
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孔哲 《冶金设备管理与维修》2013,(2):47-53,56
文章结合酒钢高速线材生产实际,提出了孔型设计的方法、粗中轧轧制程序表,并采用刚塑性有限元法对粗中轧过程进行了模拟分析,提出了相关的量能与变形参数。 相似文献