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采用基于Euler网格的有限体积法对典型空心建筑用铝型材挤压过程进行数值模拟,系统研究了挤压成形过程中的金属流动、焊缝形成过程、挤压载荷和流动速度分析。结果表明:空心铝型材挤压过程分为分流、填充、焊合和成形4个阶段;焊合面中心部位金属流速较快,首先发生接触,顶端和底端最后焊合;金属材料流出工作带时挤压力达到最大。试验结果与仿真结果吻合较好。
The finite volume method based on Euler grid was used to simulate the extrusion process of typical hollow aluminum profiles. The metal flow, weld formation, extrusion load and flow velocity were analyzed systematically. The results show that the extrusion process of hollow aluminum profile is divided into four stages: shunting, filling, welding and forming. The metal flow velocity in the center of the welding surface is faster, the contact occurs first, and the top and bottom ends are welded together finally. When squeezing pressure to achieve maximum. The experimental results are in good agreement with the simulation results.