Springback Calibration of a U-Shaped Electromagnetic Impulse Forming Process

Cui, Xiaohui; Zhang, Zhiwu; Yu, Huimin; Xiao, Xiaoting; Cheng, Yang

doi:10.3390/met9050603

Cited by 19 publications

(4 citation statements)

References 15 publications

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“…EMIF is a kind of powerful and high-speed forming technique where the deformation velocity can reach up to 300 m•s −1 [75] and the strain rate of the sheet metal is of the order of approximately 103•s −1 [76][77][78]. To precisely control the material behaviour in EMIF and obtain parts without defects, various techniques were employed, such as applying two-step forming [79], using tailored forming coils [80], selecting optimized process parameters [81], predicting formability and failure [82] and electromagnetic calibration [81,83]. EMIF is a powerful technique that can promote significant increases in the strain to failure in low ductility materials because of the strain rate and inertial effect [84].…”

Section: Electromagnetic Incremental Formingmentioning

confidence: 99%

Recent Developments and Future Challenges in Incremental Sheet Forming of Aluminium and Aluminium Alloy Sheets

Trzepieciński

Najm

Oleksik

et al. 2022

Metals

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Due to a favourable strength-to-density ratio, aluminium and its alloys are increasingly used in the automotive, aviation and space industries for the fabrication of skins and other structural elements. This article explores the opportunities for and limitations of using Single- and Two Point Incremental Sheet Forming techniques to form sheets from aluminium and its alloys. Incremental Sheet Forming (ISF) methods are designed to increase the efficiency of processing in low- and medium-batch production because (i) it does not require the production of a matrix and (ii) the forming time is much higher than in conventional methods of sheet metal forming. The tool in the form of a rotating mandrel gradually sinks into the sheet, thus leading to an increase in the degree of deformation of the material. This article provides an overview of the published results of research on the influence of the parameters of the ISF process (feed rate, tool rotational speed, step size), tool path strategy, friction conditions and process temperature on the formability and surface quality of the workpieces. This study summarises the latest development trends in experimental research on, and computer simulation using, the finite element method of ISF processes conducted in cold forming conditions and at elevated temperature. Possible directions for further research are also identified.

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Section: Electromagnetic Incremental Formingmentioning

confidence: 99%

Recent Developments and Future Challenges in Incremental Sheet Forming of Aluminium and Aluminium Alloy Sheets

Trzepieciński

Najm

Oleksik

et al. 2022

Metals

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show abstract

“…Fourthly, as far as electromagnetic forming (EMF) is concerned, Cui et al [9] established a three-dimensional (3D) finite element model (FEM), including quasi-static stamping, sequential coupling for electromagnetic forming (EMF), and springback, to analyse springback calibration by electromagnetic force. It was found that the tangential stress in the sheet bending region is reduced, and even the direction of tangential stress in the bending region is changed after EMF.…”

Section: Contributionsmentioning

confidence: 99%

Forming Processes of Modern Metallic Materials

Trzepieciński

2020

Metals

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“…This allowed it to greatly improve the material forming limit, simplify the mold manufacturing, reduce residual stress, enhance forming accuracy, and easily control the energy, improving the production automation. For example, Cui et al [9][10] simulated the electromagnetically-assisted forming of V-shaped and U-shaped parts. Cui et al [11] proposed a novel reverse-bending method using EMF.…”

Section: Introductionmentioning

confidence: 99%

Large ellipsoid parts manufacture using electromagnetic incremental forming with variable blankholder structure

Cui

Yan

Chen

et al. 2021

Int J Adv Manuf Technol

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The large ellipsoid parts are the main load-bearing components in the rocket tank, which are prone to wrinkle when using the traditional stamping. In order to solve the wrinkling problem in large parts, the EMIF method with a variable blank holder is proposed in this paper. The numerical simulation has shown that the sheet material near the blank holder is, as a consequence of stamping, subjected to circumferential compressive stress. When the drawing height was 100 mm, the sheet metal was notably wrinkled. In the electromagnetic forming (EMF) process, the sheet region facing the coil becomes thinner.However, the sheet metal thickness corresponding to the coil edge increases with the increase in forming height. If the EMF forming height is 150 mm, the sheet, which is in contact with the smooth mold, is deformed without a wrinkle. Compared to the traditional stamping, the EMF can signi cantly reduce the sheet metal wrinkling, improving the deformation height of the sheet metal smooth area.

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Springback Calibration of a U-Shaped Electromagnetic Impulse Forming Process

Cited by 19 publications

References 15 publications

Recent Developments and Future Challenges in Incremental Sheet Forming of Aluminium and Aluminium Alloy Sheets

Recent Developments and Future Challenges in Incremental Sheet Forming of Aluminium and Aluminium Alloy Sheets

Forming Processes of Modern Metallic Materials

Large ellipsoid parts manufacture using electromagnetic incremental forming with variable blankholder structure

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