Transactions of Materials and Heat Treatment

Title：Application of butterfly dies in aluminum hollow profiles extrusion

Authors： CHENG Lei XIE Shui-sheng HE You-feng HUANG Guo-jie FU Yao

Unit： Beijing General Research Institute for

KeyWords： butterfly die aluminum hollow profiles extrusion porthole die

ClassificationCode：TG379

year,vol(issue):pagenumber：2011,36(1):13-16

Abstract：

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.

Funds：

国家重点基础研究发展计划（973）项目（2010CB735811）；“十一五”国家科技支撑计划（2007BAE38B04）

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