模具结构对复杂断面铝合金型材挤压变形的影响

Influence of Die-structure on Extrusion Deformation of Aluminum Alloy Profile with Complex Section

为了获得高质量表面、高精度尺寸的复杂断面铝合金挤压产品,采用数值模拟对挤压成型过程进行了分析。通过对模具的结构优化,包括调整分流孔面积、各分流孔与挤压筒的中心距离、改变宽展角度,复杂断面空心型材分流模各分流孔及焊合面的金属流速获得合理匹配;通过数值仿真,全面获得了金属流动变形规律,预测了产品成形质量,有助于优化模具结构和挤压工艺。

In order to obtain aluminum alloy extruded products of complex section with the high quality surface and high precision size, the extrusion forming process was analyzed by numerical simulation. Through the optimization of the structure of the die, including adjusting the shunting holes size, the distance of each shunting hole and the extrusion cylinder center, changing the angle of spread, reasonable matching of the metal flow velocity of each shunting hole and the welded surface of the shunting die with complex section for hollow profile was obtained; the deformation rule of metal flow was overall obtained by numerical simulation and the product forming quality was predicted, which helps optimize die structure and extrusion process.