Analysis of Process Parameters and Forming Mechanisms within the Electromagnetic Forming Process

Kleiner, Matthias; Beerwald, C.; Homberg, Werner

doi:10.1016/s0007-8506(07)60089-4

Cited by 65 publications

(33 citation statements)

References 2 publications

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“…Neglecting the variations of the mutual inductance during the forming operation [14,15], the discharged current flowing in the flat spiral coil is approximately described by the following equation:…”

Section: Electromagnetic Modelmentioning

confidence: 99%

A simple model to simulate electromagnetic sheet free bulging process

Correia¹,

Siddiqui

Ahzi³

et al. 2008

International Journal of Mechanical Sciences

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Section: Electromagnetic Modelmentioning

confidence: 99%

A simple model to simulate electromagnetic sheet free bulging process

Correia¹,

Siddiqui

Ahzi³

et al. 2008

International Journal of Mechanical Sciences

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“…Depending on geometry and alignment of workpiece and inductor, tubes or hollow profiles can be compressed or expended and flat or curved sheet metal can be formed [16]. In order to allow easier comparison to other forming processes, the physically correct volume forces are frequently mathematically transformed to surface forces -the so-called magnetic pressure [17].…”

Section: Electromagnetic Formingmentioning

confidence: 99%

Structuring by electromagnetic forming and by forming with an elastomer punch as a tool for component optimisation regarding mechanical stiffness and acoustic performance

et al. 2015

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-Ecological and economic reasons are forcing industry to improve efficiency and to save energy and resources. Especially for the automotive and transport industry -but also for all other industrial branches dealing with accelerated masses -lightweight design is a key issue for achieving this goal. In current product designs, insufficient geometric stiffness of the part often prohibits exploiting the full potential of weight reduction offered by modern materials. Ideally adapting the geometry to the load profile by implementing appropriate structures frequently allows wall thickness and weight reduction. At the same time, the acoustic properties can be improved in many cases, because the natural frequency of the modified structure is higher compared to a conventionally-designed structure, thus leading to a reduction of awkward low frequency noise (humming). To enable a target-oriented design, the influence of structures manufactured by elastomer tools and by electromagnetic forming (EMF) was analysed systematically. Knowledge about the influence of the structuring technology and the process parameters on the resulting structure properties and the part performance allows conclusions regarding the optimisation of the part functionality via a suitable selection and design of the process.

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“…Plus la pièce est épaisse ou la fréquence élevée, plus la pression est forte sur la pièce [Beerwald 2008, Kleiner et al 2005, Murakoshi et al 1998]. D'après les équations 1.5, 1.1 et 1.12. plus le nombre de tours des spires du coil augmente plus l'inductance est grande et donc la fréquence et l'intensité maximale diminuent, il y a donc un nombre optimal de tours de spires pour chaque générateur d'impulsion.…”

Section: Etude Des Paramètres De Formageunclassified

Étude numérique du soudage par impulsion magnétique /

Guglielmetti¹

2012

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Cette thèse traite de la simulation numérique du processus de soudage par impulsion magné-tique. Le but est de pouvoir prédire la soudabilité d'un essai. Une première partie permet de se familiariser avec le procédé et une recherche bibliographique est présentée. Le soudage par explosion sert de comparatif pour dégager les critères de soudabilité, tandis que les études numériques sur le formage par impulsion magnétique permettent une première approche de la modélisation par le couplage séquentiel. La seconde section traite de la simulation électromagnétique dans ANSYS, simulation qui part d'un courant imposé dans une bobine pour arriver au calcul des forces de Lorentz qui vont propulser le tube extérieur sur le tube intérieur, tout deux placés de façon concentrique dans la bobine. Le modèle développé est vérifié et une étude de sensibilité des paramètres matériau et de dispositif est menée. Dans la troisième partie le modèle mécanique est développé dans ABAQUS/Explicit et les différentes opportunités de couplage ainsi que les nombreuses difficultés présentées. Par un couplage séquentiel, un outil de simulation du formage a été codé et par couplage séquentiello-faible, l'outil de simulation du soudage. Enfin une dernière partie permet d'exploiter l'outil numérique pour optimiser les essais ; l'analyse est faite selon 3 critères : vitesse d'impact, vitesse de collision et angle d'impact. Dans un premier temps, une étude de sensibilité rend compte des tendances des influences des divers paramètres ; ensuite un cas concret fictif est pris et une méthode est mise en place pour optimiser les paramètres que l'utilisateur choisira afin de parvenie au meilleur cordon de soudure. Magnetic Pulse Welding numerical study SummaryThis thesis deals with numerical simulation of magnetic pulse welding. The goal is to be able to predict if welding will occur or not. In a first part, one gains knowledge with the process and a state of art is presented. Explosive welding is used for comparison to bring out the welding criteria while numerical study on magnetic pulse forming gives a first approach of modeling with a sequential coupling. The second section deals with electromagnetic modeling with ANSYS. This simulation starts with an imposed current in a coil and ends with the computation of the Lorentz force that will propel the exterior tube on the interior one. Both tubes are collinearly put in the coil. The developed model is validated and a sensibility study of the material and device is made. In a third part, the mechanical model is developed with ABAQUS/Explicit and the various opportunities and numerous difficulties presented. A tool for simulation of the forming with sequential coupling and a tool for simulation of the welding with sequentiallo-weak coupling is proposed. Finally, in the last part, the numerical tool is used to optimize test. Analysis is done by 3 criteria : impact speed, collision speed and collision angle. First, the trend of the parameters influence is examined. Then, an imaginary concreted example is used ...

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Analysis of Process Parameters and Forming Mechanisms within the Electromagnetic Forming Process

Cited by 65 publications

References 2 publications

A simple model to simulate electromagnetic sheet free bulging process

A simple model to simulate electromagnetic sheet free bulging process

Structuring by electromagnetic forming and by forming with an elastomer punch as a tool for component optimisation regarding mechanical stiffness and acoustic performance

Étude numérique du soudage par impulsion magnétique /

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