半空心铝型材挤压过程数值模拟与工艺参数优化

Numerical simulation of the extrusion process and optimization of the technological parameters for half-hollow aluminum profile

以半空心铝型材导流模具为例,运用HyperXtrude有限元分析软件对半空心铝型材的挤压过程进行数值模拟,并对挤压参数进行优化。采用正交试验分析了挤压速度、挤压筒温度、坯料温度和模具温度等挤压工艺参数对挤压流动均匀性的影响趋势。分析结果表明,以标准速度偏差SDV值大小作为评判挤出均匀性的标准,影响挤压均匀性大小的挤压参数排序为:挤压速度>挤压筒温度>模具温度>坯料温度。优化后的挤压参数为:坯料温度490℃、模具温度480℃、挤压筒温度420℃、和挤压速度1.5 mm·s-1。将优化后的挤压参数应用于模具设计并进行挤压成形试验,获得了挤压均匀性较好的合格型材。

Based on the diversion extrusion die of half - hollow aluminum profile, the extrusion process was simulated and the technological parameters of extrusion process were optimized using the finite element analysis software HyperXtrude. The orthogonal test was applied to analyze the influential regularities of technological parameters such as extrusion speed, extrusion cylinder temperature, billet temperature and die temperature etc. on extrusion flow uniformity. The results show that the influential order of technological parameters affecting the extrusion uniformity according to the standard speed deviation SDV is extrusion speed 〉 extrusion cylinder temperature 〉 die temperature 〉 billet temperature. The optimized technological parameters are billet temperature 490 ℃, die temperature 480 ℃, extrusion cylinder temperature 420 ℃ and extrusion speed 1.5 mm · s-1. According to the above technological parameters, extmsion die was designed and extrusion experiment was carried on. As a result, qualified extrusion uniformity sample was obtained.