共查询到19条相似文献,搜索用时 156 毫秒
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用三维弹-塑性有限元法对H型钢轧制过程中腹板单位压力分布规律进行模拟分析,将翼缘与腹板与开进行研究,利用可变刚度的伪单元模拟翼缘与腹板交接面上特殊的金属流动关系,这些将翼缘与腹板整体考虑进行研究更符合实际,同时采用伪单元模拟轧制过程中金属表面与轧辊间的接触磨擦状态,较真实地表出了轧制变形区中存在滑动,粘着的磨擦特性。 相似文献
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由轧制方法生产的外侧定尺的H型钢其精度已被焊接H型钢相同,尤其适应于作结构件。为了生产这种H型钢,开发了腹板内侧压延及无槽立边轧制方法,以便分别控制腹板厚度与翼缘宽度。腹板内侧宽度轧制由带有轧辊宽度可调的万能轧机进行轧制,无驱动的无槽立轧机附属于万能轧机。这就可以允许在工艺过程中自动轧制不同宽度的翼缘。川崎钢厂于1989年11月开始商业生产外侧定尺的H型钢。 相似文献
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H型钢万能轧制的变形特性 总被引:3,自引:0,他引:3
本文在实验和理论分析的基础上,对H型钢万能轧制的变形机构进行了研究,阐明了万能轧制的特点;给出了计算腹板和翼缘的金属交换量的解析式;并对变形区的组成进行了分析。 相似文献
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XU Xu-dong BAI Jin-lan WANG Bing-xin LIU Xiang-hua WU Di 《钢铁研究学报(英文版)》2006,13(1):27-30,39
Symbol List a(t)———Node acceleration vector ; B———Flange width, m; ttBL———Transition matrixfromlinear strainto displacement ; ttBNL———Transition matrix from nonlinear strain to dis-placement ; C———Damping matrix; Dh———Diameter of horizontal roll , m; Dijkl———Component of constitutive matrix; Dv———Diameter of vertical roll , m; te.ij———Strain rate tensor ; fi———Unit volume force ,(N·m-3) ; H———Inner width, m; K———Stiffness matrix; M———Mass matri… 相似文献
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万能轧机轧制H型钢的数值模拟分析 总被引:2,自引:0,他引:2
利用显式动力学有限元分析方法,模拟了H型钢在轧制过程中的变形情况,分析了影响金属流动过程的主要因素。研究结果表明,轧件的腿腰延伸比和腿宽对金属的流动趋势有明显的影响。 相似文献
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Flange spread is one of the most important factors in the production of H‐beams with the universal rolling mill. Although some prediction models for flange spread have been proposed, the constants in the model equations should be determined for each product size, which requires much experimental work. In this research, finite element analysis was carried out in various rolling conditions and a technique for deciding the model constants by the analysis was investigated. First, rolling experiments using pure lead were carried out to confirm the correctness of the flange spread model. Finite element analyses were then executed for rolling conditions corresponding to the experiments. The flange spread in the numerical analyses showed very good agreement with the experimental results, confirming the accuracy of the numerical simulation. At the same time, the possibility of determining the model constants by numerical analysis was demonstrated. Other related properties of universal rolling were also investigated with the data from the finite element analysis. Changes in the web and flange thicknesses after exiting the roll gap were quantitatively simulated. The cross‐flow behavior between the web and flange was investigated, and the effect of rolling conditions on the cross‐flow ratio was obtained. This research demonstrates that finite element simulation is a powerful tool for investigating and modeling deformation in H‐beam universal rolling. 相似文献
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对H型钢轧制过程中腹板波浪的产生机理及形成条件进行了研究。利用解析的方法,给出了腹板产生屈曲的临界应力和应变。使用有限元软件MSC.Marc, 建立了H型钢轧制的弹塑性有限元模型,并成功地仿真出了腹板屈曲现象,给出了此过程中轧件的应力和变形规律。得到了出现腹板波浪时腹板和翼缘相对压下量的临界比值和半波长等特征值参数。 相似文献