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 published on a yearly basis
Papers
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27 Mar 2001TL;DR: In this article, a long strength member for an automobile is constituted such that it has cutout parts 3 at four corners of a basic rectangular cross section 2 and a cross-shaped closed cross section on the whole.
Abstract: PROBLEM TO BE SOLVED: To provide a strength member for an automobile being light in weight, having excellent shaft collapse performance and high bending strength performance, and capable of preventing the occurrence of a crack even when using a high strength steel plate. SOLUTION: This long strength member 1 for the automobile is constituted such that it has cutout parts 3 at four corners of a basic rectangular cross section 2 and a cross-shaped closed cross section on the whole, a plate thickness of the cutout part 3 is thicker than a plate thickness of parts other than the cutout part, namely, a side wall 4 and a top wall 5 by 5 to 30%, and a hardness of the cutout part 3 is larger than a hardness of parts other than the cutout part, namely, the side wall 4 and the top wall 5 by 5% or more. Furthermore, the strength member 1 is formed by drawing or hydroforming.
13 citations
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TL;DR: In this article, the effects of tube bending, preforming and subsequent hydroforming on formability of austenitic stainless steel in manufacture of engine cradle were studied, and the results showed it can obtain high forming quality and dimensional accuracy when tubes are filled with 0.7mm diameter steel balls during bending process.
13 citations
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01 Aug 2017TL;DR: In this article, a new theoretical model is developed to predict the critical rupture pressure in production of cone cups, in which Barlat-Lian yield criterion is utilized and tensile instability is considered based on the maximum load applied on the sheet.
Abstract: Forming of flat sheets into shell conical parts is a complex manufacturing process. Hydrodynamic deep drawing process assisted by radial pressure is a new hydroforming technology in which fluid pressure is applied to the peripheral edge of the sheet in addition to the sheet surface. This technique results in higher drawing ratio and dimensional accuracy, better surface quality, and ability of forming more complex geometries. In this research, a new theoretical model is developed to predict the critical rupture pressure in production of cone cups. In this analysis, Barlat–Lian yield criterion is utilized and tensile instability is considered based on the maximum load applied on the sheet. The proposed model is then validated by a series of experiments. The theoretical predictions are in good agreement with the experimental results. The effects of geometrical parameters and material properties on critical rupture pressure are also studied. The critical pressure is increased with increase in the height ratio...
13 citations
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05 Nov 1997TL;DR: In this paper, a surface-treated steel pipe for hydroforming is described, in which at least its outer surface is coated with a lubricating organic resin to a thickness of 0.5 μm to 100 μm.
Abstract: A lubricant surface-treated steel pipe for hydroforming use in which at least its outer surface is coated with a lubricating organic resin to a thickness of 0.5 μm to 100 μm. The surface-treated steel pipe provides excellent prevention of galling and excellent lubrication in hydroforming. Also, hydroforming can be started immediately after the surface-treated steel pipe is cut into short pieces.
13 citations
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31 Oct 2007
TL;DR: In this article, a method for making a stator assembly including the steps of providing a generally cylindrical stator casing, hydroforming the stator case into a generally helical shape, and positioning a stators liner having a generally linear shape inside the stators' casing is described.
Abstract: A method for making a stator assembly including the steps of providing a generally cylindrical stator casing, hydroforming the stator casing into a generally helical shape, and positioning a stator liner having a generally helical shape inside the stator casing.
13 citations