導料室模具設計對中空鋁擠型銲合壓力影響之研究

Study on the Guiding Chamber Effect on Welding Pressure of in Hollow Extrusion Die Design

許光城(Quang-Cherng Hsu) ； 許志鵬(Chi-Peng Hsu) ； 黃伯勤(Bo-Qin Huang) ； 李國維(Kuo-Wei Lee)

《先進工程學刊》 6卷3期 (2011/07) Pp. 209-216

https://doi.org/10.29948/JAE.201107.0009

摘要

本研究藉由增加特殊模具特徵，以增加Al7075鋁合金中空管件擠型之銲合壓力。於產品出口處設計不同比例尺寸之導料室結構，並使用有限元素分析軟體DEFORM 3D分析模擬各種設計參數對負荷位移、銲合壓力之影響。對中空鋁擠型產品而言，鋁合金七千系列中之Al7075擁有比一般六千系列材更良好之材料特性，包含優異的強度與韌性等。然而業界多使用六千系列鋁合金材料作為中空管件之使用材料，唯獨間接擠製無縫管件才使用Al7075，這是因為使用傳統之模具設計結構在Al7075中空管件產品不易銲合。因此若要使用直接擠製高產能、高品質之Al7075有縫中空管件，增加銲合壓力、提升產品之銲合品質就變成相當重要的課題。本研究定義不同高度比例之導料室結構，在母模出口與公模承面區設計具相同角度之導料室，使胚料在出承面前完全填滿銲合室，以充分的增加銲合壓力。研究結果顯示，在母模出口處與公模承面處增加導料室結構，能有效的提升銲合壓力，進而增加銲合面之品質，其中又以導料室高度與長度比例為(2:1)時增加銲合壓力之效果最顯著，模擬進入穩態區之銲合面壓力約可達到大於600MPa以上之壓力。

關鍵字

中空鋁擠型 ； 直接擠製 ； 鋁合金7075 ； 銲合壓力 ； 有限元素分析

並列摘要

In order to increase the welding pressure of the hollow Al7075 tube in extrusion process, a special die feature has been created. Several different proportions of room structure in outlet of extrusion die have been designed. The finite element analysis software DEFORM 3D to analyze various design parameters on the load-displacement and the welding pressure have been studied.Comparing to 6000 series, 7000 series aluminum alloy have good material properties, including excellent strength and toughness especially for hollow aluminum extrusion products in terms of Al7075. However, in extruded hollow aluminum alloy products, the industry's common use is 6000 series material, except for indirectly extruded seamless pipe, Al7075 can be found. This is because of less welding pressure can be provided by using the traditional die structures in Al7075 hollow products. Therefore, to use the directly extruded seam tube of Al7075 in high-yield and high-quality, to increase the welding pressure and improve the quality of welding products becomes a very important issue. In this study, a different high proportion in material guiding chamber has been defined. The same angle both on the exit of female die and the bearing of male die which can be integrated into a material guiding chamber has been designed. Therefore, the welding pressure can be increased due to the change of metal flow behavior that is after a complete fill in material guiding chamber, and then metal can flow out of die bearing surface.The results showed that welding pressure can be increased rapidly if a suitable material guiding chamber has been built. Among them, the ratio of chamber height and length is (2:1); the increased welding pressure is most significant.

並列關鍵字

hollow aluminum extrusion ； direct extrusion ； Al7075 ； welding pressure ； finite element analysis