方矩形管连续辊弯成型金属的流动规律  

Metal Flow Law of a Circular Tube Into a Rectangular-Tube in Continuous Roll Forming Process

作　　者：付志强[1,2] 杜凤山[1,2] 安子军[1] 段利英[1] 于辉[1] 杨帆[1,2] 

机构地区：[1]燕山大学机械工程学院,河北秦皇岛066004 [2]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004

出　　处：《钢铁》2014年第4期42-46,共5页Iron and Steel

基　　金：国家自然科学基金资助项目(51075352;51275445)

摘　　要：为了研究方矩形管辊弯成型时金属的流动规律,结合某厂实际生产工艺,建立了方矩形管辊弯成型的三维弹塑性非线性有限元模型,基于该模型得到的仿真结果与现场轧制结果基本一致,通过对仿真结果的分析分别得到了方矩形管辊弯成型时长边、角部、短边和纵向上的内、中、外层的金属流动规律。研究结果表明:在厚度方向稳定段处,从外层到内层的金属流动规律是不一致的,长边处的不一致性要比短边处明显;在纵向上前、中、后段处,外层上的金属流动规律存在较大的差异,前段与后段的外、内层上的金属流动规律是相反的。分析结果为预测最终成型尺寸精度与辊弯成形工艺参数的制定提供了理论依据。In order to investigate the metal flow law in the process of rectangular tube roll forming, a three-dimensional elastic-plastic nonlinear finite element model of rectangular tube roll forming was established with the actual factory production process. The simulated result by the finite element model is consistent with that of field measurements. The metal flow law is obtained by analyzing the nodal displacements in inner, middle and outer on the long side, short side and corner. The results show that： the metal flow law is not consistent from the outer to the inner layer in the middle section of the thickness direction, and the inconsistency at the long side is more obvious than that at the short side; There exists a large difference in the longitudinal metal flow law of the front, middle and tail in outer layer, and the metal flow law of the outer and the inner layer of the front and the tail is on the contrary. The results provide an important theoretical basis for predicting the final dimensional accuracy and roll forming process parameters.

关 键 词：方矩形管 辊弯成型 金属流动规律 有限元 

分 类 号：TG331[金属学及工艺—金属压力加工]