斜轧穿孔过程金属流动的有限元模拟  

FEM SIMULATION OF METAL FLOW IN CROSS PIERCING PROCESS

作　　者：双远华[1] 赖明道[2] 张中元[3] 

机构地区：[1]太原重型机械学院材料科学分院,太原030024 [2]燕山大学 [3]南京航空航天大学

出　　处：《机械工程学报》2004年第3期140-144,149,共6页Journal of Mechanical Engineering

基　　金：山西省自然科学基金(20021066)

摘　　要：应用刚塑性有限元法对热轧穿孔过程中的变形、几何构形以及变形区内速度场、应变场和温度场等进行了模拟计算。在确定的工艺条件下,如辊型、送进角、孔喉尺寸、顶头前伸量及毛管的椭圆度等,解决了斜轧金属流动有限元模拟中的边界条件、网格自动划分等相关问题。由变形速度场的分布可明确穿孔中顶头前的金属流动状况,其计算结果通过变形区轧卡试件进行了比较,认为该模拟对斜轧变形过程是可行合理的,且可用于其他斜轧过程的有限元模拟分析。The rigid-plastic finite element method for a slightly compressible material is employed to analyze deformation, configuration and fields of velocity, strain and temperature in hot cross piercing process. Under the certain technical conditions, such as roller shape, feed angle, piercing gorge size and plug advance, some technical problems in finite element model are resolved. The metal flow in front of the plug point is determined by this method in field of velocity and is checked by experimental sample. It is proved that the simulation for the piercing process is reasonable, and the model can be used to other cross rolling processes.

关 键 词：斜轧穿孔 金属流动 有限元 数值模拟 变形 几何构形 工艺参数 

分 类 号：TG335.71[金属学及工艺—金属压力加工] TB115[理学—数学]