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Fast 3D inverse simulation of hot forging processes via Medial Axis Transformation: an approach for preform estimation in hot die forging

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Abstract

In hot die forging processes, the selection of an ideal preform is of great importance with respect to cavity filling and mechanical load. The common procedure in order to define an adequate preform is the usage of Finite-Element-Analysis (FEA), usually as an iterative process in which various preforms are tested with regard to their suitability. An approach that aims at reducing the number of trials by proposing a first estimation of a suitable preform is presented in this paper. It is conjectured that the material flow paths and resistance can be described by the cavity shape using the Medial Axis Transformation. Based on this, a local inverse material flow for time discrete steps is calculated. The result is a first estimation of an adequate preform shape within a few minutes as an input for further FEA. FE-based parametric design optimization procedure is then presented and compared to the inverse approach, which is identified as a useful complement for the forward simulation technique.

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Notes

  1. Note, that it is in general not a 2-manifold, since it can have branches and fin-like structures.

  2. All computations were carried out on four Intel Xeon CPUs with 2.66 GHz and 8 GB RAM.

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Acknowledgments

The authors thank the German Research Foundation (DFG) for the financial support of the research project "Schnelle inverse Materialflusssimulation für die Massivumformung mittels der dreidimensionalen Mediale-Achse-Transformation” (project numbers BE 1691/110-1 and WO 954/7-1).

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Authors and Affiliations

  1. Institute of Forming Technology and Machines (IFUM), Leibniz Universität Hannover, An der Universität 2, 30823, Garbsen, Germany

    A. Santangelo, T. Hadifi & B.-A. Behrens

  2. Welfenlab, Division of Computer Graphics, Leibniz Universität Hannover, Welfengarten 1, 30167, Hanover, Germany

    P. Blanke & F.-E. Wolter

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  1. A. Santangelo
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  2. P. Blanke
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  3. T. Hadifi
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  4. F.-E. Wolter
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  5. B.-A. Behrens
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Correspondence to A. Santangelo or P. Blanke.

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Santangelo, A., Blanke, P., Hadifi, T. et al. Fast 3D inverse simulation of hot forging processes via Medial Axis Transformation: an approach for preform estimation in hot die forging. Prod. Eng. Res. Devel. 7, 409–416 (2013). https://doi.org/10.1007/s11740-013-0461-7

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  • DOI: https://doi.org/10.1007/s11740-013-0461-7

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