X5214铝合金型材挤压过程的数值模拟  

Numerical simulation of extrusion process of X5214 aluminum alloy profile

作　　者：林高用[1] 周佳[1] 郑小燕[1] 冯迪[1] 黄光法[1] 彭大暑[1] 

机构地区：[1]中南大学材料科学与工程学院,有色金属材料科学与工程教育部重点实验室,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2008年第4期748-754,共7页Journal of Central South University:Science and Technology

基　　金：云南省省院省校科技合作计划项目(2003UABAB05A050)

摘　　要：通过采用有限元法与有限体积法相结合,在MSC.Super Forge有限元商业软件上实现了挤压比λ=98.28的X5214铝型材挤压过程的数值模拟;对比了3种不同导流孔形状对型材挤出模口处z向的流速均匀性;获得该型材挤压过程的材料流动速度场、应力场和温度场分布图,并对金属的流动过程进行分析。模拟分析结果表明:对于X5214铝型材,采用对称导流模可获得较佳的流速均匀性。The finite element method （FEM） and the finite volume method （FVM） were used for numerical simulation of the extrusion process. The forming of a complex thin-walled aluminum profile X5214 with extrusion ratio of 98.28 was simulated in the new simulation system on the platform of MSC.SuperForge successfully. The uniformity of the velocity in z direction at the die orifice in three different deflector shapes was compared. The distributions of velocity field, effective stress field and temperature field during the extrusion process were discussed and the metal flowing process was analyzed. The results of numerical simulation show that, for X5214 aluminum profile, the most uniform flow velocity field can be obtained by adopting the symmetrical deflector.

关 键 词：大挤压比 铝型材 导流孔形状 数值模拟 

分 类 号：TG376.2[金属学及工艺—金属压力加工]