Research and advances in fundamentals and industrial applications of hydroforming

Hartl, C.

doi:10.1016/j.jmatprotec.2005.06.035

Cited by 116 publications

(45 citation statements)

References 7 publications

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“…But, whatever the fabrication process chosen, it will affect the properties of the tube to be hydroformed. In addition, the complexity of the hydroformed components requires that, most of the time, additional preceding operations such as bending or crushing have to be considered together with the hydroforming process itself (Hartl, 2005). As a result, these preliminary operations affect the formability of the raw tube before hydroforming.…”

Section: Tube Hydroforming Technologymentioning

confidence: 99%

Formability extension of aerospace alloys for tube hydroforming applications

et al. 2010

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Section: Tube Hydroforming Technologymentioning

confidence: 99%

Formability extension of aerospace alloys for tube hydroforming applications

et al. 2010

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“…Usually, there are two ways to realize the weight reduction: (1) using lightweight materials such as aluminum alloy, magnesium alloy, and composite materials and (2) using hollow components instead of stamped and forged parts [2,3]. Since the hydroforming process is proposed, it has been increasingly used in the automotive industry for body-in-white parts, because the requirements for improved safety and lightweight can be both satisfied [4,5].…”

Section: Introductionmentioning

confidence: 99%

Pre-form design for hydro-forming of aluminum alloy automotive cross members

Cai

Wang

Yuan

2015

Int J Adv Manuf Technol

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Due to the requirement of lightweight in the automotive industry, aluminum alloy components with irregular cross sections have been used for body-in-white parts. In order to obtain an aluminum alloy cross member with uniform thickness distribution and acceptable dimension accuracy, a hydro-forming process of a 6063-T4 aluminum alloy cross member was studied by experimental research and numerical simulation. To avoid severe thinning and bursting during hydro-forming, the design of experiments according to a central composite design method was carried out, and the significance of pre-form structural parameters was discussed on thinning. According to the optimum pre-form shape, experimental researches were then conducted on thickness distribution of typical sectional profiles and dimension accuracy. It is shown that the maximum thinning is 14 %, which is located on sectional profile B-B. The deviation of circumferential dimension accuracy along the axial direction is 0.33 %. The maximum dimensional deviation at sectional profiles A-A and B-B is 0.19 and 0.22 mm, respectively; accordingly, the dimension accuracy along the width direction is 0.4 and 0.31 %, respectively. Finally, a sound hydro-formed cross member is obtained.

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“…Plenty of new forming technologies, such as electromagnetic forming [1,2], multipoint forming [3,4], and sheet metal flexible-die forming using different pressuretransmitting mediums [5][6][7], were invented and gain rapid development and wide application in the past decades.…”

Section: Introductionmentioning

confidence: 99%

Effects of viscosity on viscous pressure bulging (VPB) of Al1060 sheet

Yuan

Fang

et al. 2015

Int J Adv Manuf Technol

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The properties of pressure-transmitting medium have a great effect on the formability of sheet metal in sheet flexible-die forming, such as rubber-pad forming and viscous pressure forming (VPF). In this study, viscous pressure bulging (VPB) experiments were used to investigate the effects of viscosity on Al1060 sheet. At the same dome height, the configurations of bulging specimen varied with three different viscosity viscous mediums (1#, 550,000 g/mol; 2#, 700, 000 g/mol; and 3#, 900,000 g/mol). The thickness strain distributions of specimen formed by a higher viscosity medium had a relatively uniform distribution. In order to further study the effects of viscosity on VPB, a CDSB-FEM-EFGM program was used to analyze viscous pressure bulging process. The configuration, stress, strain, and wall thickness distributions of bulging specimen were obtained. The numerical analysis results had a good agreement with the experimental ones, which also showed that properties of the viscous medium had a great effect on the formed specimen. The formability of sheet metal can be further improved through increasing the viscosity of viscous medium.

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Research and advances in fundamentals and industrial applications of hydroforming

Cited by 116 publications

References 7 publications

Formability extension of aerospace alloys for tube hydroforming applications

Formability extension of aerospace alloys for tube hydroforming applications

Pre-form design for hydro-forming of aluminum alloy automotive cross members

Effects of viscosity on viscous pressure bulging (VPB) of Al1060 sheet

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