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http://dx.doi.org/10.5228/KSPP.2007.16.8.567

Hydroforming Characteristics of Double Layered Tube  

Kwon, S.O. (부산대학교, 정밀기계공학과)
Yi, H.K. (부산대학교, 정밀기계공학과)
Chung, G.S. (포스코, 자동차 가공연구 그룹)
Moon, Y.H. (부산대학교 기계공학부)
Publication Information
Transactions of Materials Processing / v.16, no.8, 2007 , pp. 567-574 More about this Journal
Abstract
Double layered tube is assembled with an inner tube and an outer tube, similar in material or not, contacting closely and deforming simultaneously when subjected to external force. For the manufacturing of double layered tube, the hydroforming assembly technology has several advantages. Therefore in this study, hydroforming characteristics of double layered tube was investigated. The free bulge test was performed to produce formability diagrams of double layered tubes at various forming pressure and feeding amounts. The hexagonal shape hydroforming test was also performed to estimate the dimensional accuracies of double layered tube through the corner filling ratio and the gap between inner and outer tube. Besides experimental analyses, the analytical model that can predict internal pressure for the hydroforming of double-layered tube was proposed and experimentally validated.
Keywords
Hydroforming; Double Layered Tube; Free Bulge Test; Hexagonal Shape Hydroforming; Corner Filling Ratio;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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