Browse > Article
http://dx.doi.org/10.5228/KSPP.2007.16.3.157

Study of Deflection around Hydropierced Hole with Experiment  

Han, S.S. (금오공과대학교 기계공학부)
Kang, Y.S. (POSCO 기술연구소 자동차가공연구그룹)
Kim, G.H. (POSCO 기술연구소 자동차가공연구그룹)
Publication Information
Transactions of Materials Processing / v.16, no.3, 2007 , pp. 157-162 More about this Journal
Abstract
The hydropiercing process gives a lot of advantages to the tube hydroforming such as cost reduction and high productivity. However it has a drawback, the amount of deflection around the hole is bigger than that of conventional die piercing process. The deflection can cause the problem at the assembly process of stamped parts and hydroformed part. Therefore the reduction of deflection is one of the most important issues for hydropiercing process. In this study, the deflection around hydropierced hole was investigated by experiment. As a result of investigation, the amount of deflection is influenced by the internal pressure, the material thickness' and the size of hole. Especially the hole size is most influencing factor on the deflection around the hydropierced hole.
Keywords
Sheared Ege; Internal Pessure; Hydroforming; Rollover; Tapered Pnch;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 US Patent NO.5, 974, 846, Nov. 2, 1999, Method of forming and piercing a tube
2 US Patent NO. 5, 398, 533, Mar. 21,1995, Apparatus for piercing hydro formed part
3 최성기, 김동규, 문영훈, 2004, 하이드로 피어싱 된 튜브 부위의 변형 해석, 한국소성가공학회지, 제 13권, pp.154-158
4 A. M. Goijaerts, L. E. Govaert, F. P. T. Baaijens, 2001, Evaluation of ductile fracture models for different metals in blanking, J. Mater. Proc. Tech., Vol. 110, pp. 312-323   DOI   ScienceOn
5 S. Kalpakjian, Manufacturing processes for engineering materials, 1991, Addison Wesley