Transactions of Materials and Heat Treatment

Title：Numerical simulation on extrusion forming for large ribbed thin-walled circular tube aluminum profile

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ClassificationCode：TG146.21；TG379

year,vol(issue):pagenumber：2022,47(4):181-189

Abstract：

For a large ribbed thin-walled circular tube aluminum profile, a finite element numerical model of perforated needle extrusion forming for the large ribbed thin-walled circular tube aluminum profile was established, and based on the numerical simulation results, the induction chamber contour and working belt length were optimized. The research results show that the large ribbed thin-walled circular tube aluminum profile has the problems of extremely uneven material flow rate and cross-section temperature. The material flow rate in the rib part of profile is extremely fast with the maximum value of 724 mm·s-1, while the material flow rate in the arc part of profile is very slow with the minimum value of only 3.079 mm·s-1. After the induction chamber contour is optimized, the material flow rate is controlled within the range of 20.4-59.23 mm·s-1, and the cross-section temperature is controlled within the range of 500.8-518.3 ℃, showing the significant effect of improving the material flow rate and temperature distribution. After the working belt length is optimized, the uniformity of the material flow rate and the cross-section temperature is further improved. The material flow rate is controlled within the range of 25.76-44.40 mm·s-1, and the cross-section temperature is controlled within the range of 504.5-517.5 ℃, achieving the ideal material flow rate and uniform temperature distribution.

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作者简介：王少华（1983-），男，博士，高级工程师 E-mail：shaohuawang1983@163.com

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