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Tribological measures for controlling material flow in sheet-bulk metal forming

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Abstract

Sheet-bulk metal forming (SBMF) is characterized by successive and/or simultaneous occurrence of quite different load conditions regarding stress and strain states. These conditions significantly influence the material flow and thus the geometrical accuracy of the components. To improve the product quality a control of the material flow is required. An appropriate approach is given by locally adapted tribological conditions due to surface modifications of tool and workpiece, so-called tailored surfaces. Within the present study different methods to adapt the surfaces are presented and investigated with respect to their tribological effectiveness in SBMF. In a first step, requirements regarding necessary adaptions of the friction values for two SBMF processes are numerically defined. Based on the requirements different tailored surfaces are presented and analyzed regarding their tribological influence. Finally, the potential of surface modifications to improve SBMF processes is shown.

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Acknowledgments

This work was supported by the German Research Foundation (DFG) within the scope of the Transregional Collaborative Research Centre on sheet-bulk metal forming (CRC/TR 73, Subprojects A1, A2, B2, B3, B4, B5, B8 and C1).

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Authors and Affiliations

  1. Institute of Manufacturing Technology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 13, 91058, Erlangen, Germany

    M. Löffler, K. Andreas, U. Engel, R. Schulte, D. Groebel & M. Merklein

  2. Institute of Machining Technology, Technische Universität Dortmund, Dortmund, Germany

    E. Krebs, D. Freiburg & D. Biermann

  3. Institute of Materials Engineering, Technische Universität Dortmund, Dortmund, Germany

    D. Stangier & W. Tillmann

  4. Institute of Engineering Design, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany

    T. Weikert, S. Wartzack & S. Tremmel

  5. Institute of Production Engineering and Machine Tools, Leibniz Universität Hannover, Hannover, Germany

    H. Lucas & B. Denkena

Authors
  1. M. Löffler
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  2. K. Andreas
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  3. U. Engel
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  4. R. Schulte
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  5. D. Groebel
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  6. E. Krebs
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  7. D. Freiburg
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  8. D. Biermann
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  9. D. Stangier
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  10. W. Tillmann
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  11. T. Weikert
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  12. S. Wartzack
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  13. S. Tremmel
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  14. H. Lucas
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  15. B. Denkena
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  16. M. Merklein
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Correspondence to M. Löffler.

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Löffler, M., Andreas, K., Engel, U. et al. Tribological measures for controlling material flow in sheet-bulk metal forming. Prod. Eng. Res. Devel. 10, 459–470 (2016). https://doi.org/10.1007/s11740-016-0695-2

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  • DOI: https://doi.org/10.1007/s11740-016-0695-2

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