Topic
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.
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58 citations
Patent•
22 Apr 1998TL;DR: In this article, a method for hydroforming a metallic tube comprising primary hydroforming and secondary hydroforming is presented. But, the method is not suitable for high liquid pressure, and reduction in wall thickness and shape defects can be prevented.
Abstract: A method for hydroforming a metallic tube comprising primary hydroforming and secondary hydroforming, wherein in the primary hydroforming step, the metallic tube is formed such that a circumferential length of an expanded portion of the primary-hydroformed tube as measured at a wall center region of the expanded portion becomes substantially equal to or slightly shorter than a circumferential length of an expanded portion of a product as measured at a wall center region of the expanded portion, and in the secondary hydroforming step, movable pads incorporated in the dies press the expanded portion formed through primary hydroforming so as to finish the cross-sectional profile of the expanded portion into that of the expanded portion of the product, and said primary hydroforming and secondary hydroforming are continuously performed within the dies. Also disclosed is an apparatus for performing the hydroformation method. According to the method of the present invention, high liquid pressure is not required, and reduction in wall thickness and shape defects can be prevented.
58 citations
Patent•
18 Nov 2002TL;DR: In this paper, a hydroformable frame element is formed from the combination of at least two elements, with a partially overlapping region, with an annular space defined within the overlapping region.
Abstract: A hydroformable frame element is formed from the combination of at least two elements The at least two elements are designed with a partially overlapping region, with an annular space defined within the overlapping region The annular space is filled with adhesive, which is then cured to bond the at least two elements together The adhesive bond is designed to withstand the stresses caused by the hydroforming operation and to retain its strength so that the hydroformed article is then usable as a vehicular frame element
57 citations
57 citations
TL;DR: In this paper, a finite element study along with response surface methodology (RSM) for design of experiment (DOE) has been used to construct models for three responses namely: bulge height, thickness reduction, and wrinkle height as a function of geometrical factors for X shape bi-layered tube hydroforming.
57 citations