锻压技术

大型带筋薄壁圆管铝型材挤压成形数值模拟

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

作者：王少华1 2 刘惠1 2 3 陈宗强1 2 王海龙1 2 李占强1 2 陈良3

单位：1. 北京航空材料研究院 2. 北京市先进铝合金材料及应用工程技术研究中心 3. 山东大学

分类号：TG146.21；TG379

出版年,卷(期):页码：2022,47(4):181-189

摘要：

以某大型带筋薄壁圆管铝型材为研究对象，建立了大型带筋薄壁圆管铝型材穿孔针挤压成形有限元数值模型。基于数值模拟结果，开展了导流室轮廓和工作带长度优化。研究结果表明，大型带筋薄壁圆管铝型材存在材料流速、断面温度极不均匀的问题，型材筋部的材料流速极快，最高达到了724 mm·s-1，而型材圆弧部分的流速很慢，最低仅为3.079 mm·s-1。导流室轮廓经过优化后，材料流速的控制范围为20.40~59.23 mm·s-1，断面的温度范围为500.8~518.3 ℃，显著地改善了材料流速和温度分布的效果。工作带长度经过优化后，材料流速和断面温度均匀性得到了进一步的提高，材料流速控制范围为25.76~44.40 mm·s-1，断面的温度范围为504.5~517.5 ℃，获得了较为理想的材料流速与温度分布均匀性。

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.

基金项目：

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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