Transactions of Materials and Heat Treatment

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

Authors： Sun Xiaolong Shen Jian Yan Xiaodong Du Peng Zhang Fei Wang Zhongtang

Unit： General Research Institute For Nonferrous Metals Shenyang Ligong University

KeyWords： Ω channel finned-tube extrusion FVM numerical simulation

ClassificationCode：TG375

year,vol(issue):pagenumber：2014,39(9):58-62

Abstract：

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.

Funds：

孙晓龙（1988-），男，硕士研究生

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