空心铝型材蝶形模挤压技术的应用

Application of butterfly dies in aluminum hollow profiles extrusion

介绍了一种新型空心铝型材挤压模具即蝶形模的设计技术,蝶形模是将传统分流组合模的矩形分流桥设计成拱形,而且分流桥的中心部位较低,用来减少突破挤压力,改善金属的流动性。系统研究了蝶形模的主要结构及特点。列举了蝶形模在空心铝型材挤压中的一些应用实例,并与传统分流组合模进行了比较研究,通过对比表明:使用蝶形模可以有效降低挤压力,提高挤压速度,显著改善金属的成形性能,是一种高效的空心铝型材挤压成形技术。

A new aluminum extrusion die named butterfly die was introduced.Designing a butterfly die means giving the bridges an arched shape in place of the typical edged shape.The height in the central part of bridge was lower.The shape of the bridges helps to reduce breakthrough pressure,and to improve the flow behavior of aluminum during extrusion.The main structures of butterfly die and its features were studied.Examples of butterfly dies practical implication in aluminum alloy hollow profiles extrusion were listed,and the extrusion performance with traditional pothole die was compared.The results show that adopting butterfly die can significantly reduce extrusion load,improve extrusion speed and formability of metal.It is an efficiently extrusion forming technique of aluminum hollow profiles.