Numerical analyses of the influence of a counter punch during deep drawing

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Behrens, B.-A.; Rosenbusch, D.; Wester, H.; Weichenhain, J.; Althaus, P.: Numerical analyses of the influence of a counter punch during deep drawing. In: Merklein, M.; Hagenah, H.; Duflou, J.; Fratini, L.; Martins, P.; Meschut, G.; Micari, F. (Eds.): Sheet Metal 2023 : the 20th International Conference on Sheet Metal was hosted by the Institute of Manufacturing Technology at the Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany. Millersville, PA : Materials Research Forum LLC, 2023 (Materials research proceedings ; 25), S. 329-336. DOI: https://doi.org/10.21741/9781644902417-41

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To cite the version in the repository, please use this identifier: https://doi.org/10.15488/15083

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In the automotive sector, the demand for high crash safety and lightweight construction has led to an increased use of steels with higher strengths. However, the rising number of varying materials with different strengths and ductilities lead to an increasing complexity in productionmaking it more challenging to ensure robust processes. Therefore, the focus of current researches still lays on the further development and extension of forming processes to enable high productivity and reliable production. A powerful tool for an efficient optimisation and extension of forming processes is the Finite Element Method (FEM), which offers time-and cost saving potentials in the design phase. In deep drawing, the use of a counter punch offers the possibility oextending the process limits. By superimposing compressive stresses on the workpiece, the initiation of cracks can be delayed, thus higher drawing ratios can be achieved. The aim of this research is therefore the numerical investigation of a deep drawing process with a counter punch to analyse the influence on the crack initiation and identify optimisation potentials for the processFor this cause, the applied force as well as the position and geometry of the counter punch are varied and the influence on fracture initiation is evaluated. It is found that the applied force on the counter punch is the major influencing factor for crack initiation. Furthermore, it was concluded that the contact between the counter punch and the workpiece should be applied as soon as the bottom of the cup is shaped. A further improvement can be achieved if the counter punch is geometrically adapted to the bottom of the workpiece.
License of this version: CC BY 3.0 Unported
Document Type: BookPart
Publishing status: publishedVersion
Issue Date: 2023
Appears in Collections:Fakultät für Maschinenbau

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1 image of flag of United States United States 5 35.71%
2 image of flag of Germany Germany 4 28.57%
3 image of flag of Brazil Brazil 3 21.43%
4 image of flag of Thailand Thailand 1 7.14%
5 image of flag of Indonesia Indonesia 1 7.14%

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