直缝焊管排辊成形中预成形段的动力显式仿真  

Dynamic Simulation on Pre-forming Section of Cage Roll Forming Processes of Electric Resistance Welded Pipes

作　　者：蒋劲茂[1] 李大永[1] 彭颖红[1] 李建新[2] 李永宏[3] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]宝山钢铁股份有限公司,上海200122 [3]中国石油管道华中输气公司,武汉430074

出　　处：《上海交通大学学报》2008年第9期1443-1447,共5页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金资助项目(50375095);上海市科委资助项目(06QA14026、03ZR14064、041107049、05JC14022);上海交大-宝钢公司合作项目

摘　　要：考虑到直缝焊管的排辊成形过程非常复杂,其间涉及明显的非线性,为了更好地了解板带的成形规律,针对406 mm焊管排辊成形机组的预成形段建立了弹塑性大变形有限元模型,采用动力显式算法进行了仿真计算,分别得到了预成形段管坯的等效塑性应变分布和几何变形,并通过开口度和板宽的测量验证了仿真的准确性.研究结果表明:在预成形段时最大塑性变形发生在带钢的边缘,其次是带钢中心以及带钢与粗成形轧辊端面接触的区域;弯边轧辊对带钢边缘的变形贡献最大.Considering the complexity of cage roll forming process of electric resistance welded （ERW） pipes, which involves obvious nonlinearity, in order to understand the deformation behavior of sheet metals better, a large deformation elastic-plastic finite element model of the pre-forming section of Ф406 mm welded pipe cage forming mill was established and simulated through adopting dynamic explicit algorithm. The distribution of effective plastic strain and the deformed geometry of the strip at the pre-forming section were obtained, and the accuracy of simulation was validated through the measurements of opening value and circumference length of the strip. The simulated results show that at the pre-forming section, the biggest effective plastic strain occurs at the strip edge, and then the center of strip and the area contacted by the rolls of breakdown pass; the rolls of edge bending stand are contributive mostly to the deformation of strip edge.

关 键 词：排辊成形 直缝焊管 开口度 等效塑性应变 

分 类 号：TG335.13[金属学及工艺—金属压力加工]