Dr.-Ing. Dipl.-Wirt.-Ing. Ramona Hölker-Jäger
Leiterin der Arbeitsgruppe ReGAT (Elternzeit)

Baroper Str. 303
MB III / Raum 4.025
Campus Süd
44227 Dortmund
Germany

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+49 231 755 6441

Tätigkeitsschwerpunkte

Strangpressen

Additive Fertigung

Rapid Tooling

 

Projekte

in Elternzeit

 

Veröffentlichungen

2017
Hölker-Jäger, R., Strotzer, S., Tekkaya, A. E., 2017. Verfahrenskombination aus inkrementeller Blechumformung und Laserpulverauftragsschweißen. Workshop „Additive Fertigung in der Umformtechnik“, 27.04.2017, Dortmund, Germany.
Hölker-Jäger, R., Tekkaya, A. E., 2017. Verfahrenskombination aus inkrementeller Blechumformung und additiver Fertigung. Werkstoffwoche, 27.-29.09.2017, Dresden, Germany.
2016
Hölker, R., Tekkaya, A. E., 2016. Advancements in the manufacturing of dies for hot aluminum extrusion with conformal cooling channels. The International Journal of Advanced Manufacturing Technology, Vol. 83 (5), pp. 1209-1220.
Hölker-Jäger, R., Tekkaya, A. E., 2016. Additive manufacture of tool and dies for metal forming,  In: Brandt, M.: Laser Additive Manufacturing: Materials, Design, Technologies and Applications, Woodhead Publishing Series in Electronic and Optical Materials, Elsevier Science & Technology, pp. 439-464.
2015
Hölker, R., Tekkaya, A. E., 2015. Advancements in the manufacturing of dies for hot aluminum extrusion with conformal cooling channels. The International Journal of Advanced Manufacturing Technology. Volume 83, Issue 5, pp. 1209-1220.
Hölker, R., Haase, M., Ben Khalifa, N., Tekkaya, A. E., 2015. Hot extrusion dies with conformal cooling channels produced by additive manufacturing. In: Materials Today: Proceedings 2, Aluminium 2000 and International Conference on Extrusion and Benchmark (ICEB), Florence, Italy, pp. 4838-4846.
Tekkaya, A. E., Kloppenborg, T., Hölker, R., Schwane, M., Güzel, A., Haase, M., 2015. New Developments in the Simulation of Extrusion Processes. In: Proceedings of the International Conference: New Developments in Forging Technology – NEMU 2015,Stuttgart, Germany, pp. 125-134.
2014
Hölker, R., Haase, M., Ben Khalifa, N., Tekkaya, A. E., 2014. Additiv hergestellte Strangpresswerkzeuge - Produktivitätssteigerung durch den Einsatz von konturnaher Innenkühlung.  Werkstattstechnik online 104, Heft 10, pp. 679-685.
Hölker, R., Haase, M., Ben Khalifa, N., Tekkaya, A. E., 2014. Increased Productivity in Hot Aluminum Extrusion by Using Extrusion Dies with Inner Cooling Channels Manufactured by Rapid Tooling. In: Key Engineering Materials 611-612, Esaform 2014, Espoo, Finland.
Tekkaya, A. E., Ben Khalifa, N., Grzancic, G., Hölker, R., 2014. Forming of lightweight metal components: Need for new Technologies. In: 11th International Conference on Technology of Plasticity, ICTP, Nagoya, Japan.
2013
Hölker, R., Jäger, A., Ben Khalifa, N., Tekkaya, A. E., 2013. Controlling heat balance in hot aluminum extrusion by additve manufactured extrusion dies with conformal cooling channels. International Journal of precision engineering and manufacturing 14 (8), pp. 1487-1493.
Hölker, R., Jäger, A., Ben Khalifa, N., Tekkaya, A. E., 2013. Cooling of extrusion dies manufactured by rapid tooling technologies. In: Proceedings of the 6th JSTP International Seminar on Precision Forging, Kyoto, Japan.
Selvaggio, A., Kloppenborg, T., Schwane, M., Hölker, R., Jäger, A., Donati, T. L., Tekkaya, A. E., 2013. Extrusion Benchmark 2013 – Experimental analysis of mandrel deflection, local temperature and pressure in extrusion dies. In: Advances in Hot Metal Extrusion and Simulation of Light Alloys, Proceedings of ICEB 2013, Dortmund, Germany.
2012
Hölker, R., Jäger, A., Ben Khalifa, N., Tekkaya, A. E., 2012. New concepts for cooling of extrusion dies manufactured by rapid tooling. In: Tomesani, L., Donati, L. (Eds.), Progress in Extrusion Technology and Simulation of Light Metal Alloys, Selected, peer reviewed papers from the ICEB 2011, Key Engineering Materials 491, Trans Tech Publications, Zurich-Durnten, Switzerland, pp. 223-232.
Hölker, R., Jäger, A., Tekkaya, A. E., 2012. Rapid laminated hot extrusion dies with integrated cooling channels. In: Mori, K., Pietrzyk, M., Kusiak, J., Majta, J., Hartley, P., Lin, J. (Eds.), Steel Research International, Special Edition: 14th International Conference Metal Forming, Wiley, Weinheim, Germany, pp. 503-506.

 

 

Patente

Angemeldet

2014
Hölker-Jäger, R., Ben Khalifa, N., Tekkaya, A. E., Method and device for the combined production of components by means of incremental sheet forming and additive methods in one clamping setup, 22.09.2014, DE20141014202.
2013
Jäger, A., Hölker-Jäger, R., Lueg-Althoff, J., Kwiatkowski, L., Demir, O. K., Tekkaya, A. E., Verfahren zur Herstellung von Werkzeugspulen und/oder Werkzeugen für die Magnetumformung insbesondere dünnwandiger Werkstücke aus elektrisch leitfähigen Werkstoffen sowie entsprechend hergestellte Werkzeugspule, 06.08.2013, DE102013013335.