Journal of the Japan Society for Technology of Plasticity
Online ISSN : 1882-0166
Print ISSN : 0038-1586
ISSN-L : 0038-1586
Development of Microtube Hydroforming System and Its Application to Cross-Shaped Microtube
Shigeki MORIHideki SATOKenta ITAIKen-ichi MANABE
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2017 Volume 58 Issue 672 Pages 72-77


In this study, a new microtube hydroforming (THF) system utilizing ultrahigh pressure to fabricate cross-shaped microcomponents is designed and developed. The micro-THF die assembly employs a new type of split die and has a die housing with a flow channel of fluid medium to apply ultrahigh pressure into a tube through micro notches on an axial punch. A phosphorous-deoxidized copper tube with an outer diameter of 500µm and thickness of 100µm is used for cross-shaped micro THF experiment. Finite-element analysis is carried out to confirm and clarify the deformation characteristics, forming limit, and suitable forming conditions inoder to enhance the protrusion height of cross-shape forming. Consequently, a cross-shaped microcomponent with an outstanding bulge height of 1. 6 times the outer diameter is successfully fabricated experimentally.

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© 2017 The Japan Society for Technology of Plasticity
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