方管双辊交互式成形模式的仿真与分析  

FEM Simulation and Analysis of Roll-Box Model of Square Steel Tubes

作　　者：仇素萍[1] 彭颖红[1] 王飞舟 李大永[1] 周飞[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240 [2]日本中田制作所

出　　处：《上海交通大学学报》2007年第4期634-638,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)

摘　　要：方管的双辊交互式成形模式(Roll-Box)是一种新的圆成方成形模式.将共旋构架下材料客观性本构模型引入大变形弹塑性动力显式有限元算法,选用解析法描述轧辊,并推导出与其对应的接触算法,建立了双辊交互式成形方式有限元仿真模型,对圆成方再成形过程进行仿真.通过分析壁厚变化、周向收缩(拉伸)和应力等变形情况,为双辊交互式成形模式的实现提供了试验和理论基础.Roll-Box is a new forming mode of producing square steel tubes. In order to research the new mode, a large deformation elastic-plastic FEM model was developed by introducing objective constitutive model of rotational formula into the dynamic explicit FEM. Meanwhile, analytical method was selected to describe the surface of rollers and the corresponding contact algorithm was introduced. The roll forming process of ＂round to square＂ was simulated, and the change of wall thickness, stretch/ shrink ratio and stress of inner and outer surface were investigated, which provides guideline for experiment and theory to realize the new mode in workplaces.

关 键 词：方形钢管 双辊交互式成形模式 客观本构模型 辊弯成形 

分 类 号：TG302[金属学及工艺—金属压力加工]