C1: Constitutive friction law for the description and optimization of tailored surfaces

Constitutive friction law for the description and optimization of tailored surfaces

(Third Party Funds Group – Sub project)

Overall project: TRR 73: Umformtechnische Herstellung von komplexen Funktionsbauteilen mit Nebenformelementen aus Feinblechen - Blechmassivumformung
Project leader: Ulf Engel, Kai Willner, Marion Merklein
Project members: Florian Beyer, Maria Löffler, Ulrich Vierzigmann, Franz Hauer, Johannes Henneberg
Start date: 1. January 2009
End date: 31. December 2020
Acronym:
Funding source: DFG / Sonderforschungsbereich / Transregio (SFB / TRR)
URL: https://www.tr-73.de/

Abstract

A central challenge in sheet-bulk metal forming is a partially uncontrolled material flow. This worsens the achievable geometrical accuracy of the parts. In this context, the objective of the project is to control the material flow by local adjustments of the friction by modifying the workpiece or tool surface. Hereby, the die filling of the functional elements is improved. Especially tool-sided modifications have a high potential, since they do not extend the process chain. However, for an efficient application, they must offer a high wear resistance, which is why the functional relationships between wear-induced changes in the tool topography and friction are being researched.

Publications

• 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. (ed.): Sheet Bulk Metal Forming, Cham: Springer Nature Switzerland, 2021, p. 307 - 333 (Lecture Notes inProduction Engineering)
  ISBN: 978-3-030-61901-5
  DOI: 10.1007/978-3-030-61902-2_14
• Henneberg J., Beyer F., Willner K., Merklein M.:
  Konstitutives Reibgesetz zur Beschreibung und Optimierung von Tailored Surfaces
  23. Umformtechnisches Kolloquium Hannover: Aktuelle Entwicklungen im Bereich der Umformtechnik (Hannover)
• Henneberg J., Merklein M.:
  Investigation on extrusion processes in sheet-bulk metal forming from coil
  In: CIRP Journal of Manufacturing Science and Technology (2020)
  ISSN: 1755-5817
  DOI: 10.1016/j.cirpj.2020.08.007
• 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
  In: Manufacturing Review 7 (2020), Article No.: 9
  ISSN: 2265-4224
  DOI: 10.1051/mfreview/2020003
• Henneberg J., Merklein M.:
  Measures for controlling the material flow when extruding sheet-bulk metal forming parts from coil
  In: Manufacturing Review 7 (2020)
  ISSN: 2265-4224
  DOI: 10.1051/mfreview/2020033