Strain hardening behavior during manufacturing of tube shapes by hydroforming

Park, Hyun Kyu; Yi, Hui-Jun; Tyne, C. J. Van; Moon, Young Hoon

doi:10.1007/s12540-009-0897-7

Cited by 11 publications

(2 citation statements)

References 10 publications

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“…Tube hydroforming (THF) has the advantages of weight reduction, improved structural rigidity, lower tooling costs, fewer secondary operations, and reduced scrap, as compared to conventional stamping. [1][2][3] It is important to improve sealing effect without leakage of fluid in order to give a high internal pressure in the tube. If the sealing at the ends of tube is insufficient, or the fluid inside the tube is leaking during the THF process, product having a desired shape is hard to obtain.…”

Section: Introductionmentioning

confidence: 99%

Enhancing hydroformability of nonaxisymmetric part with variable cross section

Kang

Joo

et al. 2015

Advances in Mechanical Engineering

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Methodology to enhance hydroformability of nonaxisymmetric thin-wall tubular component with variable cross sections was investigated in this study. In order to solve punch leakage problem occurred at nonaxisymmetric thin tube, the leakresistive punch was suggested. Attaching lead at contact region of tube and punch was implemented to prevent leakage occurred due to uneven pressure distribution between punch and tube. And lead patch has also been attached at locally strain-concentrated tube surface to retard strain-concentrated necking. To validate the proposed enhancing methodology, nonaxisymmetric thin-wall tubular model part with variable cross sections has been hydroformed. The successful fabrication of model part that had previously failed during conventional hydroforming processing confirms the feasibility of proposed methodology.

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Section: Introductionmentioning

confidence: 99%

Enhancing hydroformability of nonaxisymmetric part with variable cross section

Kang

Joo

et al. 2015

Advances in Mechanical Engineering

Self Cite

View full text Add to dashboard Cite

show abstract

“…Hydroforming is a technology that utilizes hydraulic pressure to form tube or sheet materials into desired shapes inside die cavities [1][2][3][4]. By using this manufacturing technique, rather than stamping, forging or casting processes, it is possible to produce more complex shapes with increased strength and lower cost.…”

Section: Introductionmentioning

confidence: 99%

Process design and experimental verification of hydroforming for flanged tubular part

Joo

Choi

Tyne

et al. 2011

Proceedings of the Institution of Mechanical Engineers, Part B:

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Tube hydroforming is a technology that utilizes hydraulic pressure to form a tube into desired shapes inside die cavities. It is widely used in the automotive industry because of its various advantages, such as weight reduction, increased strength, improved quality, and reduced tooling cost. Hydroformed automotive parts used as structural components in the vehicle body frame or the subframe must often be structurally joined at certain locations, and it is useful if these parts can be manufactured with a localized attachment flange. This study proposes a flange hydroforming process, which consists of pre-bulging, flange forming, and conform shaping. The numerical process design by finite element (FE) analysis was performed with Dynaform 5.5. To accomplish a successful flange hydroforming process design, investigations on the proper combination of process parameters such as tool geometry, tube diameter, and internal hydraulic pressure were performed. To fabricate a flange of a specific target length on hydroformed tubular parts, an analytical model that predicts the flange length for a given set of process conditions is proposed. Hydroforming experiments to fabricate a flanged tubular part were performed, and the forming characteristics at various pressure conditions were analysed. The results show that the proposed hydroforming process can successfully produce flanged parts of a specific target length.

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FMEA for the reliability of hydroformed flanged part for automotive application

Joo

Kim

et al. 2013

J Mech Sci Technol

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Strain hardening behavior during manufacturing of tube shapes by hydroforming

Cited by 11 publications

References 10 publications

Enhancing hydroformability of nonaxisymmetric part with variable cross section

Enhancing hydroformability of nonaxisymmetric part with variable cross section

Process design and experimental verification of hydroforming for flanged tubular part

FMEA for the reliability of hydroformed flanged part for automotive application

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