Formation ability welding seams and mechanical properties of high strength alloy AA7075 when extrusion hollow square tube

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• 作者：Quang-Cherng Hsu (1)
  Anh Tuan Do (1) (2)
  
  1. Department of Mechanical Engineering ; National Kaohsiung University of Applied Sciences ; 415 Chien-Kung Road ; 80778 ; Kaohsiung City ; Taiwan
  2. Department of Mechanical Engineering ; Hung Yen University of Technology and Education ; Dan Tien-Khoai Chau-Hung Yen ; Vietnam
  
• 关键词：AA7075 ; Die life ; Extrusion ; Mechanical property ; Porthole die ; Welding seam
• 刊名：International Journal of Precision Engineering and Manufacturing
• 出版年：2015
• 出版时间：March 2015
• 年：2015
• 卷：16
• 期：3
• 页码：557-566
• 全文大小：3,662 KB
• 参考文献：1. Wang, S. T., Lee, R. S., Li, H. Y., Chen, C. H. (2006) Optimal Die Design for Three-Dimensional Porthole Extrusion using the Taguchi Method. Proc. of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 220: pp. 1005-1009 CrossRef
  2. Hsu, Y. C., Lin, W. S., Yang, T. S., and Sung, S. Y., 鈥淣umerical Simulation and Reliability Analysis of Die Wear in Hot Extrusion,鈥?Journal of Technology, Vol. 21, No. 4, pp.329-336, 2006.
  3. Behrens, B. A. (2008) Finite Element Analysis of Die Wear in Hot Forging Processes. CIRP Annals-Manufacturing Technology 57: pp. 305-308 CrossRef
  4. Yin, F., Mao, H., Hua, L., Gu, Z. (2012) Back Propagation Neural Network Based Calculation Model for Predicting Wear of Fine-Blanking Die during Its Whole Lifetime. Computational Materials Science 59: pp. 140-151 CrossRef
  5. Kim, K. J., Lee, C. H., and Yang, D. Y., 鈥淚nvestigation into the Improvement of Welding Strength in Three-Dimensional Extrusion of Tubes using Porthole Dies,鈥?Journal of Materials Processing Technology, Vol. 130, pp. 426- 431, 2002.
  6. Jo, H., Jeong, C., Lee, S., Kim, B. (2003) Determination of Welding Pressure in the Non-Steady-State Porthole Die Extrusion of Improved Al7003 Hollow Section Tubes. Journal of Materials Processing Technology 139: pp. 428-433 CrossRef
  7. Jo, H., Lee, S., Lee, S., Kim, B. (2002) Prediction of Welding Pressure in the Non-Steady State Porthole Die Extrusion of Al7003 Tubes. International Journal of Machine Tools and Manufacture 42: pp. 753-759 CrossRef
  8. Jo, H., Lee, S., Jung, C., Kim, B. (2006) A Non-Steady State FE Analysis of Al Tubes Hot Extrusion by a Porthole Die. Journal of Materials Processing Technology 173: pp. 223-231 CrossRef
  9. Donati, L., Tomesani, L. (2005) The Effect of Die Design on the Production and Seam Weld Quality of Extruded Aluminum Profiles. Journal of Materials Processing Technology 164: pp. 1025-1031 CrossRef
  10. Donati, L., Tomesani, L. (2004) The Prediction of Seam Welds Quality in Aluminum Extrusion. Journal of Materials Processing Technology 153: pp. 366-373 CrossRef
  11. Lee, J. M., Kim, B. M., Kang, C. G. (2005) Effects of Chamber Shapes of Porthole Die on Elastic Deformation and Extrusion Process in Condenser Tube Extrusion. Materials & Design 26: pp. 327-336 CrossRef
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  13. Sikand, R., Kumar, A. M., Sachdev, A. K., Luo, A. A., Jain, V. (2009) AM30 Porthole Die Extrusions-A Comparison with Circular Seamless Extruded Tubes. Journal of Materials Processing Technology 209: pp. 6010-6020 CrossRef
  14. Gagliardi, F., Ambrogio, G., Filice, L. (2012) On the Die Design in AA 6082 Porthole Extrusion. CIRP Annals-Manufacturing Technology 61: pp. 231-234 CrossRef
  15. Gagliardi, F., Citrea, T., Ambrogio, G., Filice, L. (2014) Influence of the Process Setup on the Microstructure and Mechanical Properties Evolution in Porthole Die Extrusion. Materials & Design 60: pp. 274-281 CrossRef
  16. Lee, R. S., Jou, J. L. (2003) Application of Numerical Simulation for Wear Analysis of Warm Forging Die. Journal of Materials Processing Technology 140: pp. 43-48 CrossRef
  17. Kim, Y. J., Choi, C. H. (2009) A Study on Life Estimation of Hot Forging Die. Int. J. Precis. Eng. Manuf. 10: pp. 105-113 CrossRef
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• 刊物类别：Engineering
• 刊物主题：Industrial and Production Engineering
  Materials Science
  
• 出版者：Korean Society for Precision Engineering, in co-publication with Springer Verlag GmbH
• ISSN：2005-4602

文摘

Porthole die extrusion has a great advantage in the forming of hollow section of aluminum alloy tube. The proposed paper aims at the development of an extruding seam square tube of AA7075 high strength aluminum alloy by simulation and experiment. There are several factors related to extrusion load such as: billet temperature, billet dimensional, flow stress, die cavity and product geometry. The extrusion loads and die stresses for a hot extruding square tube of AA7075 with respect to different product have been investigated. This study used DEFORM 3D software based on finite element analysis to simulate two different types of hollow extruding die configurations in the square tube extrusion process, namely: Type I welding position at the corners of the square tube and Type II on the side faces. The welding strengths of these two kinds of extruded tube are studied by expanding test and tensile test. The die life of these two extrusion die components are studied based on the die stress and die wear information. The results of FE analysis are compared with those experiments.