Project Status: Active
Objective of the subproject A2 is a fundamental analysis of the effects and interactions between the workpiece and the forming zone in sheet-bulk metal forming. Investigations on a gear forming process with good oil-based lubrication have shown that an underfilling of the top land of the teeth is inevitable. An improvement of the form filling by increasing the punch stroke is not possible for this sheet-bulk metal forming process. Due to the fact that the inner area of the punch is already in contact to the blank at the bottom dead center a further movement would lead to a huge increase of the forming force. Thus, different methods for flow control of the material have been investigated in the context of the research project. The implementation of flow restrictions and the realization of locally-adapted tribological zones have been approved as an appropriate way for flow control.
This project is supported by the German Research Foundation (DFG) within the scope of the Transregional Collaborative Research Centre on Sheet-Bulk metal forming (SFB/TR 73).
Sheet-bulk metal forming of the toothing on a synchronizer ring
Hetzner, H.; Koch, J.; Tremmel, S.; Wartack, S.; Merklein, M.:
Improved Sheet Bulk Metal Forming Processes by Local Adjustment of Tribological Properties.
In: K. Ehmann (Edt.): Journal of Manufacturing Science and Engineering, 133(2012)6, ASME, in print
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
Merklein, M.; Opel, S.; Schneider, T.; Koch, J.:
Überblick der Blechmassivumformung.
In: Umformtechnik, 1(2012)3, Bamberg: Meisenbach, pp. 42-43
Merklein, M.; Koch, J.; Opel, S.; Schneider, T.:
Fundamental investigations on the material flow at combined sheet and bulk metal forming processes.
In: Annals of the CIRP, 1(2011)60, Amsterdam: Elsevier, pp. 283-286
Merklein, M.; Tekkaya, A.E.; Brosius, A.; Opel, S.; Koch, J.:
Overview on sheet-bulk metal forming processes.
In: G. Hirt, A.E. Tekkaya (Edt.): Proceedings ICTP 2011, 10(2011), Aachen, pp. 1109-1114
Schaper, M.; Lizunkova, Y.; Vucetic, M.; Hetzner, H.; Schneider, T.; Plugge, B.; Koch, J.; Opel, S.:
Sheet-bulk metal forming a new process for the production of sheet metal parts with functional components.
In: Metallurgical and Mining Industry, 3(2011)7, pp. 53-58
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
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
