Lehrstuhl für Fertigungstechnologie, Universität Erlangen-Nürnberg

Constitutive Friction Law for the Description and Optimization of Tailored Surfaces

Project Status: Active


Due to locally varying load conditions regarding stress and strain states the tribological conditions are of major importance for sheet-bulk metal forming operations (SBMF). Within the subproject C1 of the collaborative research center TR73, which is a collaboration between the Institute of Applied Mechanics and the Institute of Manufacturing Technology, the main focus is on the investigation of the tribological conditions in SBMF, qualification of tailored surfaces and the further development of a constitutive friction law.

A focal point of the subproject C1 is the investigation and further development of tribological systems. In addition to different lubricants, tailored surfaces are qualified with regard to the applicability to forming processes in SBMF. The investigation of the tribological conditions is done by the use of different laboratory friction test which have been adapted to the process conditions in SBMF. Current results revealed that workpiece-side tailored surfaces in terms of surface adjustments by micro structuring and abrasive blasting are suitable methods for influencing the friction factor m and thus, to control the material flow in SBMF processes. These results have been already proven for different forming processes in SBMF.



Research Groups



    • Henneberg, J.; Beyer, F.; Löffler, M.; Willner, K.; Merklein, M.:
      Constitutive Friction Law for the Description and Optimization of Tailored Surfaces.
      In: Merklein, M.; Tekkaya, A. E.; Behrens, B.-A. (Edtrs.): Sheet Bulk Metal Forming, Zug: Springer Nature, 2021, accepted


    • Pilz, F.; Henneberg, J.; Merklein, M.:
      Extension of the forming limits of extrusion processes in sheet-bulk metal forming for production of minute functional elements.
      Manufacturing Review 7(2020)9, pp. 1-12

    • Henneberg, J.; Beyer, F.; Willner, K.; Merklein, M.:
      Konstitutives Reibgesetz zur Beschreibung und Optimierung von Tailored Surfaces.
      In: Behrens, B.-A. (Edtr.): 23. Umformtechnisches Kolloquium Hannover: Aktuelle Entwicklungen im Bereich der Umformtechnik, 2020, published

    • Henneberg, J.; Merklein, M.:
      Investigation on extrusion processes in sheet-bulk metal forming from coil.
      CIRP Journal of Manufacturing Science and Technology, DOI: https://doi.org/10.1016/j.cirpj.2020.08.007 (2020), accepted

    • Henneberg, J.; Merklein, M.:
      Measures for controlling the material flow when extruding sheet-bulk metal forming parts from coil.
      Manufacturing Review, DOI: https://doi.org/10.1051/mfreview/2020033 7(2020)36, published


    • Löffler, M.; Schulte, R.; Freiburg, D.; Biermann, D.; Stangier, D.; Tillmann, W.; Merklein, M.:
      Control of the Material flow in sheet-bulk metal forming using modifications of the tool surface.
      International Journal of Material Forming 12(2019), pp. 17 - 26

    • Freiburg, D.; Aßmuth, R.; Garcia Carballo, R.; Biermann, D.; Henneberg, J.; Merklein, M.:
      Adaption of tool surface for sheet-bulk metal forming by means of pressurized air wet abrasive jet machining.
      Production Engineering 13(2019), pp. 71 - 77

    • Merklein, M.; Gröbel, D.; Löffler, M.; Henneberg, J.:
      Investigation on blasted tool surfaces as a measure for material flow control in sheet-bulk metal forming.
      Manufacturing Review 6(2019)10, pp. 1-9

    • Henneberg, J.; Lucas, H.; Denkena, B.; Merklein, M.:
      Investigation on the Tribological Behavior of Tool-sided Tailored Surfaces for Controlling the Material Flow in Sheet-Bulk Metal Forming.
      In: AIP Conference Proceedings 2113 (Edtr.): Proceedings of the 22nd International ESAFORM Conference on Material Forming, DOI: https://doi.org/10.1063/1.5112718, 2019, pp. 170002-1-6


    • Degner, J.; Herrmann, J.; Junker, F.; Berendt, E.; Merklein, M.:
      Leichtbauwerkstoffe für den modernen Automobilbau.
      Zeitschrift Konstruktion 3(2018), pp. 50-54

    • Löffler, M.; Engel, U.; Willner, K.; Beyer, F.; Merklein, M.:
      Investigation of the tribolgocal behaviour of microstructures for controlling the material flow in sheet-bulk metal forming.
      CIRP Journal of Manufacturing Science and Technology 22(2018), pp. 66-75

    • Merklein, M.; Löffler, M.; Gröbel, D.; Henneberg, J.:
      Material flow control in sheet-bulk metal forming processes using blasted tool surfaces.
      In: Qin, Y.; Dean, T.A.; Lin, J.; Yuan, S. J.; Vollertsen, F (Edtrs.): MATEC Web of Conferences, https://doi.org/10.1051/matecconf/201819013003, 190, 2018, published online


    • Löffler, M.; Engel, U.; Andreas, K.; Merklein, M.:
      Identification of tribological mechanisms of shot peened steel surfaces for an application in sheet-bulk metal forming.
      In: Proceedings of the 13th International Conference on Shot Peening (Edtr.): Martin Levesque, 2017, pp. 67-72

    • Freiburg, D. ; Löffler, M.; Merklein, M.; Biermann, D. :
      Surface structuring of forming tool surfaces by high feed milling.
      In: WGP Jahreskongress (Edtr.): 2017, accepted

    • Merklein, M.; Andreas, K.; Kraus, M.; Löffler, M.; Pilz, F.:
      Development and launching of an application-oriented test rig for wear investigations in sheet-bulk metal forming.
      In: (Edtr.): THE"A" Coatings, 2017, pp. 31-40

    Letztes Update: 24.09.2020