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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.


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Patent
08 Feb 1999
TL;DR: In this article, a method for making a vehicle frame member having a shock absorbing mounting portion constructed and arranged to be mounted to a structural component within a motor vehicle is described, where a draw-forming member is moved inwardly with respect to the cavity of the hydroforming die while the fluid is pressurized so that the drawforming member deforms a portion of the tubular wall inwardly to form a recessed portion having an annular side wall portion and a bottom wall portion.
Abstract: The present invention relates to a method for making a vehicle frame member having a shock absorbing mounting portion constructed and arranged to be mounted to a structural component within a motor vehicle. The method comprises hydroforming a tubular blank within a hydroforming die by supplying pressurized fluid to the hollow interior of the blank. A drawforming member is moved inwardly with respect to the cavity of the hydroforming die while the fluid is pressurized so that the drawforming member deforms a portion of the tubular wall inwardly to form a recessed portion having an annular side wall portion and a bottom wall portion. The formed tubular blank is then removed from the hydroforming die and a mounting structure (38) is disposed inside the recessed portion and the blank and mounting structure (38) are then disposed within an injection molding die. Molten shock absorbing material (14) is injected into the recessed portion so that the molten material (14) surrounds the mounting structure. The molten shock absorbing material is thereafter solidified. Preferably, a pair of such recessed portions are formed. The present invention also relates to a vehicle frame member to be joined to a structural component in shock absorbing relation.

20 citations

Journal ArticleDOI
TL;DR: In this paper, computer aided engineering of some innovative sheet metal forming processes is reviewed, in particular, tube hydroforming processes and spinning processes, and experimental verifications are carried out to confirm the effectiveness of the numerical predictions.

20 citations

Journal ArticleDOI
TL;DR: In this paper, the bulge height of aluminum tubes AA6063 is predicted using ductile fracture criteria at high temperatures by performing several uniaxial tensile tests at different temperatures and strain rates.

20 citations

Patent
24 Mar 1994
TL;DR: In this paper, a method of forming a tubular structural member which can longitudinally vary in wall thickness and/or perimeter, and possibly material, using the hydroforming process is described.
Abstract: A method of forming a tubular structural member (10) which can longitudinally vary in wall thickness and/or perimeter, and possibly material, using the hydroforming process. This is accomplished by first fabricating a tube blank of the desired longitudinal combination of wall thickness, perimeter and material by welding together portions of tubing (18,20) having the desired characteristics and then hydroforming the resultant blank. The hydroformed part will have nearly the same thickness, perimeter and material characteristics as the blank in the corresponding longitudinal location.

19 citations

Journal ArticleDOI
TL;DR: In this article, the authors present some results of their research activity aimed to enhance the sheet hydroforming process using a movable inferior plate through which the control of the blank forming is realized.
Abstract: In this work the authors present some results of their research activity aimed to enhance the sheet hydroforming process. The main focus is the adoption of a movable inferior plate through which the control of the blank forming is realised. Tests on hemitoroidal parts using an innovative equipment with a movable die were carried on at the Institute of Metal Research (Chinese Academy of Sciences) in cooperation with the Aalborg University, putting in evidence main defects and fracture causes. Finite element simulations of the modified hydroforming process using a movable inferior plate were performed at the Centre of Excellence for Mechanical Computation (Polytechnic of Bari), with the aim of evaluating critical strain values and their location, strain paths, load curves and stress maps were analysed. Specimens with proper geometrical shape were designed to avoid possible ruptures and to reduce material thinning in the critical regions.

19 citations


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