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Hydroforming

About: Hydroforming is a research topic. Over the lifetime, 2796 publications have been published within this topic receiving 26293 citations. The topic is also known as: Bulge forming.


Papers
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Patent
26 Nov 1996
TL;DR: In this article, a slug ejection system using the pressurized hydroforming fluid as the motive force to eject the slug of material created by the in-die hole piercing system is described.
Abstract: A hydroforming apparatus having in-die hole piercing capabilities and a slug ejection system is disclosed. The slug ejection system uses the pressurized hydroforming fluid as the motive force to eject the slug of material created by the in-die hole piercing system. The in-die hole piercing system includes a movable punch disposed within a bore formed in one of the die blocks. The bore opens into the die cavity. The punch includes a cutting edge on a first end which is adjacent the cavity. The hole is formed when the punch is inserted against a hollow workpiece positioned in the apparatus, thereby creating a slug of material. The slug ejection system includes two passageways formed internally to the same die block having the in-die hole piercing system. Both passageways open into and extend in a generally transverse direction to the bore. A first passageway is in fluid communication with the source of the hydroforming fluid. A second passageway is located generally opposite the first passageway and functions as a chute to catch the slug of material ejected by the hydroforming fluid supplied to the first passageway. The hydroforming fluid is supplied to the first passageway only after the workpiece has been hydroformed and remains pressurized and the punch is retracted to a position where it is generally aligned with both passageways.

39 citations

Patent
20 Aug 2001
TL;DR: In this paper, an apparatus and a method which use hydroforming to shape complex structures (200, 201) from materials such as sheet metal or composites was presented. But this method was not suitable for the construction of complex structures.
Abstract: The present invention provides an apparatus and a method which use hydroforming to shape complex structures (200, 201) from materials such as sheet metal or composites. In particular, an apparatus and a method for shaping complex structures using composites such as continuous-fiber or woven fiber composites with limited wrinkling or rupture of the composite during the shaping process.

39 citations

Journal ArticleDOI
TL;DR: In this article, a constitutive model was implemented in the finite element models combining the Johnson-Cook strain-rate sensitivity model, a nonlinear isotropic-kinematic hardening model, and the Yld2000-2d anisotropic model.

39 citations

Journal ArticleDOI
TL;DR: In this paper, the double-sided high-pressure (DSHP) process is used for tubular hydroforming (THF), where hydraulic pressure is introduced on both sides of the metal, and six different formability models are compared in light of their sensitivity to thickness normal stress and other process variables associated with THF.

39 citations

Patent
22 Mar 2001
TL;DR: In this paper, a composite structural element consisting of a hollow profile base and at least one plastic element is attached to the base by injection-molding, and the composite element is linked therewith by partially or completely covering the base.
Abstract: The invention relates to a composite structural element and to a method for producing the same. The inventive composite structural element consists of a hollow profile base (1) having a hollow profile cross-section that is advantageously produced by a hydroforming technique, and at least one plastic element (2) that is firmly linked with the hollow profile base (1). Said plastic element (2) is injection-molded onto the hollow profile base (1) and is linked therewith at discrete connecting points (3, 6) by partially or completely covering the hollow profile base (1) at the connecting points (3, 6, 6a, 6b, 10, 12) with the plastic material injection-molded onto it to give the plastic element (2).

39 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202330
202298
202158
202087
201981
201895