scispace - formally typeset
Search or ask a question
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.


Papers
More filters
Patent
23 Nov 1999
TL;DR: In this paper, hollow tubular blanks are inserted between the spaced apart die sections of the first and second die, and the ram and the support mechanism are moved downwardly relative to the be such that the pairs of cooperating die sections engage one another.
Abstract: A hydroforming apparatus for simultaneously performing two or more hydroforming operations includes a frame that is sized to support a plurality of hydroforming dies in a stacked relationship. Each of the dies includes a pair of cooperating die sections having respective recesses formed therein that define a die cavity. Initially, the first die section of the first die is positioned in an uppermost spaced apart position relative to the second die section of the second die, while the second die section of the first die and the first die section of the second die are positioned in an intermediate spaced apart position relative to both the first die sect of the first die and the second die section of the second die. Then, hollow tubular blanks are inserted between the spaced apart die sections of the first and second die Next, the ram and the support mechanism are moved downwardly relative to the be such that the pairs of cooperating die sections of the first and second dies engage one another. End feed cylinders are then moved laterally into engagement with the end the tubular blanks to facilitate the filling thereof with a hydroforming fluid. The pressure of the fluid within the tubular blanks is then increased to such a magnitude that the tubular blanks are expanded outwardly into conformance with the respective die cavities. Thus, the hydroforming apparatus is capable of performing two or mo hydroforming operations simultaneously to decrease the overall amount of operational cycle time and, therefore, increase overall productivity.

12 citations

Patent
Igor Riff1, Michael T. Costello1
04 Apr 2006
TL;DR: In this article, a method for improving lubricants employed in hydroforming processes is disclosed wherein said method comprises adding to said lubricants at least one over-based detergent and at least friction modifier.
Abstract: A method for improving lubricants employed in hydroforming processes is disclosed wherein said method comprises adding to said lubricants at least one overbased detergent and at least one friction modifier.

12 citations

Journal ArticleDOI
TL;DR: In this paper, a new test method was developed to examine the important properties of the semi-finished product, such as flow pressure or maximum circumferential elongation during the hydroforming process.

12 citations

Journal ArticleDOI
TL;DR: Experimental investigations on the non-Newtonian nature of thermoplastic melt as pressure medium are presented to identify the presence of non-hydrostatic pressure distribution within the cavity and its influence on the final shape of the formed sheet metal component.
Abstract: The polymer injection forming process is a recent invention for producing plastic–metal hybrids. It is a combination of injection molding and sheet metal hydroforming process in which polymer melt serves as a pressure medium. This paper presents the experimental investigations on the non-Newtonian nature of thermoplastic melt as pressure medium. The objective of this work is to identify the presence of non-hydrostatic pressure distribution within the cavity and its influence on the final shape of the formed sheet metal component. Experiments are conducted with center-gated injection mold under varying processing conditions. The development of localized cavity pressure during the process is recorded and evaluated against the final shape of formed sheet metal. It has been observed that higher injection rate, higher injection temperature, and higher melt flow index of the processed polymer is necessary for the uniform pressure distribution and subsequently uniform forming of the sheet metal.

12 citations


Network Information
Related Topics (5)
Machining
121.3K papers, 1M citations
85% related
Welding
206.5K papers, 1.1M citations
81% related
Deformation (engineering)
41.5K papers, 899.7K citations
80% related
Alloy
171.8K papers, 1.7M citations
80% related
Microstructure
148.6K papers, 2.2M citations
79% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202330
202298
202158
202087
201981
201895