双层多腔铝合金圆管新型挤压模

A new type of extrusion die for aluminum alloy tubes with double layers and multi cavities

铝合金型材正在向着大型化、整体化以及复杂化方向快速发展,这使得挤压模具的设计、加工与制造面临新的技术挑战。以一种双层多腔铝合金圆管为例,针对传统挤压模具遇到的加工难度大、加工周期长以及所挤出型材形状和尺寸精度难以满足要求等问题,提出了一种新型的"模中模"结构,并通过挤压实验验证了该种模具结构的优越性。本文作者提出的这种新型"模中模"结构,简化了加工工艺,降低了加工难度,解决了各模芯之间的供料平衡问题,保证了挤出型材的尺寸精度。这种新型模具设计方法对于复杂结构铝合金型材挤压模具设计有一定的启发和指导作用。

With the rapid development of large-scale, integrated and complex Al alloy profile, the design, processing and manufacturing of the extrusion die are facing new technical challenges. A double-layer multi-cavity aluminum alloy tube is taken as an example. There are some problems in the traditional extrusion die for this tube, e. g. difficult processing, long processing period, non-qualified shape and dimension accuracy of the extruded profile. Regarding these problems, a new type of ＂mold in mold＂ structure is proposed and its superiority is proven by the extrusion test. Thanks for the new die structure, the processing technique is simplified, the processing difficulty is reduced, the materials fed out from each mold core are balanced, and the profile dimension accuracy is ensured. This design method plays a guiding role in the design of the extrusion die for aluminum alloy profile with complex structure.