多楔楔横轧轧件金属流动数值模拟  

NUMERICAL SIMULATION OF METAL FLOW FOR MULTI-WEDGE CROSS WEDGE ROLLING

作　　者：袁文生[1] 史宝军[1] 杜朝蓬[1] 杜宪伟[1] 

机构地区：[1]山东建筑大学机电学院,济南250101

出　　处：《固体力学学报》2008年第S1期70-75,共6页Chinese Journal of Solid Mechanics

基　　金：山东省自然科学基金(Y2007F75)资助

摘　　要：多楔楔横轧技术由于主楔与侧楔之间存在着相互制约和干涉作用,工艺十分复杂。模具形状、工艺参数、毛坯形状、材料性能及轧制温度等因素对轧件成形和金属流动均有不同程度的影响。本文应用ANSYS/LS-DYNA有限元软件分别对单楔和多楔楔横轧轧件轧制过程进行了数值模拟,获得了轧件塑性区的发展状况、轧件的几何形状变化情况和金属流动状况的全貌,输出了轧件端面移动量变化曲线,并对轧制过程不同阶段的应变和变形状态进行了深入细致的分析。研究发现,多楔楔横轧轧件变形情况较单楔楔横轧复杂得多,对应不同的轧制阶段,楔横轧轧件应变场、位移场和端面移动量呈现出不同的变化规律和特点。这对于深入认识多楔楔横轧轧制机理、合理设计多楔模具有至关重要的作用。The technology of multi-wedge cross wedge rolling (MCWR) is more complicated than that of the single-wedge cross wedge rolling (SCWR). This is because that there are certain interaction and interfering relations between the main wedge and the secondary wedges. There are several factors such as the die shapes, technological parameters, roughcast shapes, material properties and rolling temperatures that have different influences on the forming of the rolled parts and the metal flow during the process. In this paper, we simulated the forming process of SCWR and MCWR using ANSYS/LS-DYNA, a commercial finite element software. We obtained the expanding state of the plastic deformation zone, the changing of the rolled part’s geometrical shape and the state of metal flow during the process. The curve on the end of the rolled part was also given. The strain and deformation states during different rolling phases are analyzed in details. It was found that, the strain and the displacement states of the rolled part have different characteristics corresponding to its different rolling phases. It is of high value for further investigation on the forming mechanism and the die design for MCWR.

关 键 词：楔横轧 多楔 金属流动 数值模拟 

分 类 号：TG331[金属学及工艺—金属压力加工]