Project Status: finished
Within the collaboration project between the Chair of Applied Mechanics (LTM) and the LFT the investigation of the tribological conditions for sheet-bulk metal forming in general, the realization of Tailored Surfaces and the development of a constitutive friction law has been done. At the LFT the tribological conditions in sheet-bulk metal forming were investigated and described. Using selected friction tests it was possible to investigate the appearing load conditions typical for sheet-bulk metal forming under laboratory conditions and to determine friction values for FE-simulation. Also suited lubricants for sheet-bulk metal forming were choosen. The defined alteration of friction and thus the control of material flow was another focus of research within this project. Geometrically defined roughened areas of workpiece surfaces showed to be a useful instrument for the determined increase in friction at certain areas. In laboratory tests as well as in first forming tests the efficiency of Tailored Surfaces has been proved.
Cross section views of teeth extruded out of the sheet plane a) with untreated surfaces b) with roughened areas for the defined improvement in mould filling
Vierzigmann, H.; Koch, J.; Merklein, M.; Engel, U.:
Material Flow in Sheet-Bulk Metal Forming.
In: Key Engineering Materials , 504-506 (2012), Durnten-Zurich: Trans Tech Publications, pp. 1035-1040
Vierzigmann, H.; Merklein, M.; Engel, U.:
Tribological Conditions in Sheet-Bulk Metal Forming.
In: 2nd International Conference of Engineering Against Fracture, (2011), published
Hauer, F.; Vierzigmann, H.; Willner, K.; Engel, U.:
Numerical simulation of friction in metal forming using a halfspace model.
In: Menary, G. (Edt.): The 14th International ESAFORM Conference on Material Forming, (2011), pp. 1741-1747
Vierzigmann, H.; Merklein, M.; Engel, U.:
Friction Conditions in Sheet-Bulk Metal Forming.
In: Procedia Engineering, 19(2011), Elsevier, pp. 377–382
Biermann, D.; Merklein, M.; Engel, U.; Tillmann, W. ; Surmann, T. ; Hense, R.; Herper, J. ; Koch, J.; Krebs, E. ; Vierzigmann, H.:
Umformwerkzeuge in der Blechmassivumformung.
In: Merklein, M.; Bach, Fr.-W.; Tekkaya, A. E. (Edt.): 1. Workshop Blechmassivumformung, (2011), Bamberg: Meisenbach, pp. 119-138
Merklein, M.; Koch, J.; Schneider, T.; Opel, S.; Vierzigmann, H.:
Manufacturing of Complex Functional Components with Variants by Using a new Metal Forming Process – Sheet-Bulk Metal Forming.
In: University of Brescia (Edt.): International Journal of Material Forming, 3 (2010), Paris: Springer, pp. 347-350
Vierzigmann, H.; Merklein, M.; Engel, U.:
Tailored Surfaces in Sheet-Bulk Metal Forming.
In: Felder, E.; Montmitonnet, P. (Edt.): Proc. 4th International Conference on Tribology in Manufacturing Processes (ICTMP), 2(2010), Paris: Transvalor - Presses des MINES, pp. 541-550
Merklein, M.; Koch, J.; Schneider, T.; Opel, S.; Vierzigmann, H.:
Manufacturing of Complex Functional Components with Variants by Using a new Metal Forming Process – Sheet-Bulk Metal Forming.
In: University of Brescia (Edt.): Proceedings of the 13th ESAFORM Conference, (2010), Brescia, published
