[ Papers ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 27, No. 6, pp.552-556

ISSN: 2508-5093 (Print) 2508-5107 (Online)

Print publication date 15 Dec 2018

Received 30 Oct 2018 Revised 08 Nov 2018 Accepted 12 Nov 2018

DOI: https://doi.org/10.7735/ksmte.2018.27.6.552

열교환기용 알루미늄 관재의 하이드로포밍 공정 적용을 위한 자유 팽창 유한요소해석과 실험적 검증

한덕현^a^{, b} ; 김건홍^a^{, b} ; 안병민^b^{, *}

Finite Element Analysis and Experimental Validation of Free Expansion of Aluminum Heat Exchanger Tube for the Hydroforming Process

Deokhyun Han^a^{, b} ; Geon-Hong Kim^a^{, b} ; Byungmin Ahn^b^{, *}

aAdvanced Materials & Processing Center, Institute for Advanced Engineering, 175-28, Goan-ro, Baegam-myeon, Cheoin-gu, Yongin, Gyeonggi-do, 17180, Korea
bDepartment of Materials Science and Engineering and Department of Energy Systems Research, Ajou University, 206, Worldcup-ro, Yeongtong-gu, Suwon, Gyeonggi-do, 16499, Korea

Correspondence to: ^*Tel.: +82-31-219-3531 Fax: +82-31-219-1613 E-mail address: byungmin@ajou.ac.kr (Byungmin Ahn).

Abstract

Hydroforming can simplify the manufacturing processes of complex-shaped metal products in terms of both time and cost, as compared with other conventional metalworking which generally consist of shaping and joining processes. However, the hydroforming process requires accurate regulation of pressure for successful forming process without defects such as bulging or buckling. These defects occurs by localized necking under excessive tension. In this research, as a preliminary study for applying the hydroforming process of aluminum 1070 alloy to fabricate heat exchanger tube, finite element analysis (FEA) was performed in free expansion condition of a linear tube, and compared with the experimental results. Variation of the outer diameter and thickness of the linear shape tube were compared between the FEA and experimental results as well as the surface defects.

Keywords:

Hydroforming, Finite element analysis, Free expansion test, Aluminum tube, Heat exchanger

References

Jung, J. I., Shin, D. W., 2011, Development Trend of Domestic and Overseas Metal Material Processing Technology, Machinery, 313 52-57.
Heo, S. C., Song, W. J., Ku, T. W., Kim, J., Kang, B. S., 2007, Study on Application of Forming Limit Criteria for Formability on Hydroforming Parts, Trans. Korean Soc. Mech. Eng. A, 31:8 833-838.
Koç, M., 2008, Hydroforming for Advanced Manufacturing, Woodhead Publishing Limited, Cambridge.
Zienkiewicz, O. C., Taylor, R. L., 2000, The Finite Element Method In : Fluid Dynamics, Butterworth-Heinemann, Oxford.
Kalpakjian, S., Schmid, S. R., Kok, C. W., 2008, Manufacturing Processes for Engineering Materials, Pearson Education, London.
Yi, H. K., Kim, B. J., Kwon, S. O., Moon, Y. H., 2007, Effect of Surface Orange Peel on the Hydroformability of Non-Heat Treated AA6061 Extruded Tube, Journal of the Korean Society for Heat Treatment, 20:3 127-132.