锻压技术

Ω槽道翅片管挤压过程数值模拟及模具优化

英文标题：Numerical simulation of extrusion process and optimization of die structure for Ω grooved finned-tube

作者：孙晓龙沈健闫晓东杜鹏张飞王忠堂

分类号：TG375

出版年,卷(期):页码：2014,39(9):58-62

摘要：

Ω槽道翅片管具有精密的内槽道结构，尺寸精度要求高，成形难度大。利用有限体积法对Ω槽道翅片管的挤压成形过程进行了模拟计算，通过分析对比模拟得到的挤出速度场和料头形貌，探讨了不同的模具结构对金属流动和管材成形的尺寸精密度的影响。模拟结果表明，采用非等长工作带和6.5 mm的模芯设计时，翅片管挤压出口金属的流速场最为均匀，尺寸精密度最好。按最优结构设计模具并进行挤压实验，挤压实验和模拟仿真得到的料头形貌吻合较好，实验测得的挤压速度和模拟得到的速度基本相符，误差在8.75%以内，表明模型构建的较为准确。

Ω channel finned-tube with a high precision inner-channel structure was quite difficult to form for the high requirement in precision. The extrusion process of Ω channel finned-tube was simulated by finite volume method. The influence of different die structures on metal flow and tube precision was discussed by comparing and analyzing the extrusion velocity field and head shape from simulation. Simulated results show that the velocity field of finned-tube extrusion exit is the most uniform and the sample precision is the best when the die was designed with non-equal length working channel and the die core of 6.5 mm. The die was designed in optimization structure and then conducted in the extrusion experiment. The head shape from calculation agrees with that from the extrusion experiment. The extrusion speed measured by experiment is also matched with that from simulation, and the deviation is less than 8.75%. It is showed that the calculation model is quite accurate.

基金项目：

孙晓龙（1988-），男，硕士研究生

参考文献：

［1］蒋翔，李晓欣，朱冬生.几种翅片管换热器的应用研究[J].化工进展，2003,22(2):183-186.Jiang X, Li X X, Zhu D S. Research on application of several Fin-Tube heat exchangers[J]. Chemical Industry and Engineering Progress, 2003,22(2): 183-186.
［2］方赵嵩．圆孔翅片管式制冷换热器的节能性能研宄[D].重庆:重庆大学,2008.Fang Z S. Research on Energy Conservation Performance of Finned-tube Refrigeration Heat Exchanger with Circular Holes[D]. Chongqing: Chongqing University, 2008.
［3］邹静, 魏永利, 郑祥健. 双翼双孔铝-氨热管挤压模具研制[J]. 轻合金加工技术, 2004, 32(7):34-37.Zou J, Wei Y L, Zheng X J. The design and manufacture of the Aluminum-Ammonia hot tubal extrusion die with twin wing and double hole[J]. Light Alloy Fabrication Technology, 2004, 32(7): 34-37.
［4］和优锋,谢水生,程磊，等.CPU散热片挤压过程的数值模拟及模具优化[J].锻压技术，2009,34(4):126-129.He Y F, Xie S S, Cheng L, et al. Numerical simulation of CPU heat sink extrusion process and die optimum design[J]. Forging & Stamping Technology, 2009,34(4): 126-129.
［5］李人宪. 有限体积法基础[M]. 北京: 国防工业出版社, 2005.Li R X. Finite Volume Method[M]. Beijing: National Defense Industry Press, 2005.
［6］陈泽中, 娄臻亮, 阮雪榆,等. 复杂铝型材挤压成形有限体积仿真[J]. 上海交通大学学报, 2005, 39(1): 27-33.Chen Z Z, Lou Z L, Ruan X Y, et al. Finite volume simulation of complex aluminum profile[J]. Journal of Shanghai Jiaotong University, 2005, 39(1): 27-33.
［7］周飞, 苏丹, 彭颖红. 铝型材挤压有限元和有限体积对比模拟[J]. 上海交通大学学报, 2003, 37(7):1072-1076.Zhou F,Su D, Peng Y H. Contrast simulation of aluminum extrusion process with FEM and FVM[J]. Journal of Shanghai Jiaotong University, 2003, 37(7): 1072-1076.
［8］黄克坚, 包忠诩, 阮锋. 有限体积数值模拟技术在宽展挤压模具设计中的应用[J]. 塑性工程学报, 2005, 12(6): 34-37.Huang K J, Bao Z X,Ruan F . The application of numerical simulation technologies during the design of the spread extrusion die[J]. Journal of Plasticity Engineering, 2005, 12(6): 34-37.
［9］谢建新, 刘静安. 金属挤压理论与技术[M]. 北京:冶金工业出版社, 2001.Xie J X, Liu J A. Metal Extrusion Theory and Technology[M]. Beijing: Metallurgical Industry Press, 2001.
［10］刘静安, 黄凯, 谭炽东. 铝合金挤压工模具技术[M].北京：冶金工业出版社，2009.Liu J A, Huang K, Tan C D. Aluminum Extrusion Tooling Technology [M]. Beijing: Metallurgical Industry Press, 2009.
［11］何优峰. 大型复杂截面铝型材挤压过程数值模拟及专用平台研究[D]. 北京：北京有色金属研究总院，2010.He Y F. Numerical Simulation of Large and Complex Cross-section Aluminum Extrusion Process and Special Platform Research[D]. Beijing: General Research Institute for Nonferrous Metals, 2010.

服务与反馈：

【本网站尚未开通全文下载服务】【加入收藏】