Influences of inner pressure and tube thickness on process responses of hydroforming copper tubes without axial force

Fatemi, Afshin; Biglari, F. R.; Morovvati, M.R.

doi:10.1243/09544054jem2001

Cited by 6 publications

(4 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The anisotropy material properties are calculated by using mathematical Eqs. (1)(2)(3)(4). The where r = planar anisotropy, Δr = normal anisotropy, n = avg.…”

Section: Mechanical and Materials Parametersmentioning

confidence: 99%

See 1 more Smart Citation

Predictions of formability parameters in tube hydroforming process

Marlapalle¹,

Hingole²

2021

SN Appl. Sci.

View full text Add to dashboard Cite

The objective of this study is to improve the bulging and minimize the thinning ratio to enhance manufacturing of components in Industries. Tube hydroforming is an advanced manufacturing technology used for making intricate and complex tubular parts which required less cycle time. This research focuses on hydroforming process, formability and process parameters design to replace the conventional tube bending, welding and cutting operations. The prediction of parameters is done by applying numerical and experimental approach. During experimentation the pressurized fluid is used to deform the tubes in a plastic deformation. In this study, two types of grade materials are used such as AISI304 and AISI409L of 57.15 mm external diameter with 1.5 mm thickness in the form of electric resistance welded tubes to measure stain path, thinning and bulge height. However, it is observed that the internal pressure and L/D ratio are effective parameters in both numerical analysis and experimentation. In axial feed condition, it is observed that 16.3% thinning in weld region and 44.6% thinning in base metal region, whereas, in fixed feed condition, it is observed that 7.7% thinning in weld region and 18.6%thinning in base metal region for L/D = 1 and L/D = 3 respectively. The numerical analysis with experimental results shows a very good match. It is seen that the axial feed leads to better formability with fixed feed condition because in axial feed condition material supplies towards the center of the bulge tube. The feasibility of the hydroforming process for manufacturing of AISI304 and AISI409L grade material as per the requirements of the industries is also checked. The maximum bulging is observed in L/D = 2 by comparing with the other ratios. This process can be effectively used for AISI304 grade material because the formability is better than AISI409L. Article highlights The strain path measured and predicted at necking point for ERW tube in both weld and base metal. Thinning is measured during bulging of tube under the axial and fixed feed condition. For L/D = 1 ratio observed strain distribution in unidirectional and L/D = 2, 3 observed in plane strain and bidirectional respectively.

show abstract

“…The anisotropy material properties are calculated by using mathematical Eqs. (1)(2)(3)(4). The where r = planar anisotropy, Δr = normal anisotropy, n = avg.…”

Section: Mechanical and Materials Parametersmentioning

confidence: 99%

“…The research focus was on process and forming parameters estimation (such pressure, yielding, ultimate and calibration points etc.) during copper tube forming under axial loading condition [2]. It is seen that the success of THF depends on feed and pressure parameters in which the reliability of FE model in hydroforming is studied.…”

Section: Introductionmentioning

confidence: 99%

Predictions of formability parameters in tube hydroforming process

Marlapalle¹,

Hingole²

2021

SN Appl. Sci.

View full text Add to dashboard Cite

show abstract

“…With the purpose of producing a part without any defect, two critical internal pressures, yield pressure ( P iy ) and burst pressure ( P ib ), must be determined first. According to Koç and Altan 13 and Fatemi et al, 14 P iy is obtained as…”

Section: Analytical Approachesmentioning

confidence: 99%

Investigation of tube hydroforming along with stamping of thin-walled tubes in square cross-section dies

Liu

Yang

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

In this article, tube hydroforming along with stamping, a compound forming technology of thin-walled tube using stamping and hydroforming processes, was presented to cut forming costs, reduce number of forming and assembly operations, and improve forming efficiency. A simple experimental tooling was designed and manufactured. Forming experiments of stamping and tube hydroforming along with stamping processes in two square cross-section dies were performed for SS304 tubes at different upper die velocities. The experimental results indicated that the better formability and the more uniform thickness distribution are obtained by the tube hydroforming along with stamping processes than by the stamping.

show abstract

“…Tube hydroforming (THF) is a manufacturing process in which fluid pressure is applied into the metallic tubular parts to form desired component shapes in a closed die. 1 THF has emerged as a desirable manufacturing process in automobile and aerospace industries due to its ability to create a complex shape in a single step. 2 THF process has also proved to be a successful forming technology, replacing conventional stamping and deep drawing processes due to cost savings in terms of the elimination of die sets, reduction in assembly operations via parts’ consolidation, tight dimensional tolerances, and complex parts’ formability.…”

Section: Introductionmentioning

confidence: 99%

Analytical prediction of forming pressure for three-layered tube hydroforming

Seyedkashi

Joo

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

Tube hydroforming is a special manufacturing process that uses high-pressure fluid to flow the material into a die cavity. This process has been used mostly in automobile and aerospace industries. Compared to the conventional metal forming processes, it has the advantages of weight reduction, less tooling cost, fewer secondary operations, and improved structural strength and stiffness. In special working environments, multi-layered tubes with combined material properties, high strength, and corrosion resistance are required to satisfy conflicting requirements. In this study, an analytical model for predicting the forming pressure range of a three-layered tube is developed and experimentally verified. Fundamental theories for calculation of the pressure for the inner, center, and outer tubes are proposed. Forming pressures are obtained from equilibrium equations for the action and reaction forces on the contacting walls of the tubes. In order to validate the proposed model, free bulge experiments are performed with stainless steel/aluminum alloy/copper alloy and stainless steel/carbon steel/copper alloy three-layered tubes. The measured forming pressures are in reasonable agreement with those obtained from the analytical model.

show abstract

Influences of inner pressure and tube thickness on process responses of hydroforming copper tubes without axial force

Cited by 6 publications

References 10 publications

Predictions of formability parameters in tube hydroforming process

Predictions of formability parameters in tube hydroforming process

Investigation of tube hydroforming along with stamping of thin-walled tubes in square cross-section dies

Analytical prediction of forming pressure for three-layered tube hydroforming

Contact Info

Product

Resources

About