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
More filters
Patent•
14 Dec 2000
TL;DR: A plurality of steel rings are affixed, as by crimping using hydroforming means, to the outside of a joint of steel well casing as discussed by the authors, and the rings are distributed in spaced relation along the joint.
Abstract: A plurality of steel rings are affixed, as by crimping using hydroforming means, to the outside of a joint of steel well casing. The rings are distributed in spaced relation along the joint. The resulting anchor joint is run into a well as part of the casing string and cemented in place.
11 citations
TL;DR: In this article, two design methods for T-shape tube hydroforming dies are proposed, namely, the extrusion-cutting-fillet method (ECFM) and the intersection-fillets method (IFM), and simulations on hydraulic expansion and axial feeding with two dies using the program DEFORM-3D were performed.
Abstract: In this paper, two design methods for T-shape tube hydroforming dies are proposed, namely, the extrusion-cutting-fillet method (ECFM) and the intersection-fillet method (IFM). Simulations on hydraulic expansion and axial feeding of T-shape tube hydroforming with two dies using the program DEFORM-3D were performed. The influence of the two dies on workpiece formability of T-shape tube hydroforming was examined. Experiments were carried out with SUS304 stainless steel tube at room temperature. A qualified product of T-shape tube, without wrinkling or bursting, was obtained using the die designed by the IFM method.
11 citations
15 May 2013
TL;DR: In order to soundly manufacture a part made from the mentioned alloys, novel processes such as hydroforming, rubber pad forming and viscous pressure forming instead of conventional stamping or deep drawing are applied.
Abstract: Recently, different industries faced the challenge of implementation of titanium alloys in order to produce components with different formability characteristics. Titanium alloy sheets are defined as hard-to-form materials regarding to their strength and formability characteristics. Consequently, in order to soundly manufacture a part made from the mentioned alloys, novel processes such as hydroforming, rubber pad forming and viscous pressure forming instead of conventional stamping or deep drawing are applied.
11 citations
TL;DR: In this paper, three models for post-processing measures obtained from the tube bulging test are compared based on the same experimental procedure, and the results obtained for the local (stress and strain) and global components (the thickness distribution along the tube and the deformed tube profile) are very close, whatever the models.
Abstract: It is now well recognized that the material data obtained from a tensile test is less appropriate than those from a Tube Bulging Test (TBT) for a finite element simulation of tube hydroforming. However, the manufacturers still use classical data (often tensile test data) for designing metal operations due to the lack of standard for the TBT and a more complex post processing analysis of experimental measures. Getting the hardening curve from the tube bulging test requires the use of an analytical or numerical model. In this paper, three models for post-processing measures obtained from the TBT are compared based on the same experimental procedure. Thanks to a preliminary step, consisting of the validation of the analytical models through the use of finite element simulations of the TBT, it highlights that the results obtained for the local (stress and strain) and global components (the thickness distribution along the tube and the deformed tube profile) are very close, whatever the models. The test configuration (die radius and free length) seems to have no significant impact on the resulting stress-strain curve for the three models. The three models are used for post processing tube bulging tests performed on AISI304, INCONEL and Copper tubes validating their capacity for tube characterization on different materials. Finally, this study demonstrates that the Boudeau-Malecot Model can be used to obtain hardening curve from TBT without a loss of accuracy compared to more complex post-processing models and with an important gain of quality compared to tensile test.
11 citations
TL;DR: In this paper, the effects of 2D and 3D prebending on the forming limit in the tube hydroforming process of an automotive rear subframe are evaluated and compared through finite element analyses and experimental tryouts.
Abstract: The effects of 2D and 3D prebending on the forming limit in the tube hydroforming process of an automotive rear subframe are evaluated and compared through finite element analyses and experimental tryouts. The influence of the strain path corresponding to each prebending method is discussed in terms of a forming limit diagram (FLD) and a forming limit stress diagram (FLSD). An incremental strain-to-stress transformation scheme to plot the FLSD from the FLD along an arbitrary strain path is proposed. A tube hydroformability testing system designed and manufactured to provide an arbitrary combination of internal pressure and axial feed is introduced. A forming limit diagram of the A6063 aluminum tube material is obtained from free bulging, T-shape forming and cross-shape forming tests using this system.
11 citations