Numerical Simulation of the Effect of Feedstock Shape on Continuous Extrusion Process
Numerical Simulation of the Effect of Feedstock Shape on Continuous Extrusion Process
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DOI：
10.4028/www.scientific.net/amr.472-475.2004
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发表时间：
2012-02
期刊：
影响因子：
--
通讯作者：
Li Chen;B. Song;X. Yun
中科院分区：
文献类型：
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作者：
Li Chen;B. Song;X. Yun
自从连续挤压工艺出现以来，原料的截面形状是圆形的。喂料形状直接影响连续挤压过程中的金属变形和金属流动特性。基于有限元方法，利用DEFORM-3D软件对铜母线连续挤压成形过程进行了数值模拟，分析了不同喂料形状对金属流动温度、速度、旋转扭矩的影响。结果表明：矩形喂料的尺寸必须在合理范围内，否则不能建立连续挤压工艺；矩形喂料比圆形喂料更有利于流动的均匀；矩形喂料的坯料和模具温度低于圆形喂料，随着喂料宽度的增加，温度降低，高温区域变小；喂料形状和尺寸的变化对挤压轮扭矩值没有影响。
Since the appearance of the continuous extrusion process, the section shape of the feedstock is round. The shape of the feedstock directly affects metal deformation and metal flow characteristics during the continuous extrusion process. Based on finite element method (FEM), using the Deform-3D software, this paper simulates continuous extrusion forming process for copper bus bar, and analyzes the effect of different feedstock shape on metal flowing temperature, velocity, rotating torque. The results show that: the size of the rectangular feedstock must be within a reasonable range, otherwise the continuous extrusion process can not be established; the rectangular feedstock is benefit to the flow uniformity comparing with the round feedstock; the temperature of the billet and tooling with rectangular feedstock is lower than that with round feedstock, as the feedstock width increases, the temperature decreases and the area of high temperature becomes smaller; the change of the feedstock shape and size has no effect on the extrusion wheel torque value.