Univ. Prof. Dr. Ing.

Bergs, Thomas

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  • Publication
    Fertigung für eine Kreislaufwirtschaft
    ( 2023-05-05)
    Bergs, Thomas
    ;
    Brimmers, Jens
    Die nachhaltige Nutzung der Ressourcen der Erde bildet das wesentliche Ziel unserer Gesellschaft. Für die Industrie und insbesondere produzierende Unternehmen ergeben sich dadurch völlig neue Herausforderungen in der Gestaltung ressourcenschonender Wertschöpfungsketten im Sinne der Kreislaufwirtschaft sowie der schnellen Realisierung nachhaltiger Produkte. Die erfolgreiche Implementierung der Kreislaufwirtschaft in produzierenden Unternehmen bedarf dabei verschiedener Ansätze - die Betrachtung der Umweltwirkung des Fertigungsprozesses, die Optimierung der fertigungsbedingten Produkteigenschaften, die Analyse der Korrelation zwischen Produktion und Nutzung sowie die Erarbeitung neuer Geschäftsmodelle zur Werterhaltung bzw. -steigerung. Der digitale Zwilling stellt hierfür das notwendige Werkzeug bzw. die Befähigung für eine erfolgreiche Umsetzung dieser Ansätze dar. Gleichzeitig ist der digitale Zwilling auch der wesentliche Befähiger für die schnelle Entwicklung von Fertigungsprozessen für die Bereitstellung nachhaltiger Produkte. Für diese beiden Ansätze werden in dem vorliegenden Beitrag verschiedene Beispiele vorgestellt, anhand derer die Möglichkeiten und Perspektiven einer nachhaltigen Produktion aufgezeigt werden. Ferner lassen sich aus den Beispielen Handlungsempfehlungen für die Umsetzung einer Kreislaufwirtschaft für produzierende Unternehmen ableiten.
  • Publication
    Manufacturing for a Circular Economy
    ( 2023-05-05)
    Bergs, Thomas
    ;
    Brimmers, Jens
    The sustainable use of the earth's resources forms the essential goal of our society. For industry, and in particular for manufacturing companies, this poses completely new challenges in the design of resource-conserving value chains in the sense of the circular economy and the rapid realization of sustainable products. The successful implementation of the circular economy in manufacturing companies requires different approaches - the consideration of the environmental impact of the manufacturing process, the optimization of the manufacturing-related product properties, the analysis of the correlation between production and use as well as the development of new business models to maintain or increase value. For this purpose, the digital twin represents the necessary tool or the enablement for a successful implementation of these approaches. At the same time, the digital twin is also the essential enabler for the rapid development of manufacturing processes for the provision of sustainable products. For both of these approaches, this paper presents various examples that are used to demonstrate the possibilities and perspectives of sustainable manufacturing. Furthermore, recommendations for action for the implementation of a circular economy for manufacturing companies can be derived from the examples.
  • Publication
    Investigations on five-axis milling and subsequent five-axis grinding of gears
    ( 2022)
    Bergs, Thomas
    ;
    Schneider, Sebastian A. M.
    ;
    Janßen, Christopher
    ;
    Jahnel, Kirk
    ;
    Ganser, Philipp
    ;
    Brimmers, Jens
    High-productivity processes such as gear hobbing and gear grinding are normally used in the manufacturing of gears. In some applications, however, the use of these processes is not possible due to accessibility. One example is the production of planetary gears with double helical teeth for the gear box in modern aircraft engines. The gear boxes are used to increase the efficiency of the engines but should be as light and compact as possible. Thus, the tool runout area for gear hobbing or gear grinding tools is too small. One way of manufacturing these gears is five-axis machining. While five-axis milling of gears has been the subject of several publications, five-axis grinding of gears has hardly been a topic. This paper presents the results of investigations on five-axis milling and subsequent five-axis grinding of gears in comparison to conventionally manufactured gears. For this purpose, after hardening, gears were first five-axis milled and then five-axis ground using different process parameters and then investigated on back-to-back test rigs regarding load carrying capacity. In addition, the dimensional accuracy was measured and the surfaces were examined metallographically. The dimensional accuracy became worse after five-axis grinding. However, in terms of gear life, the five-axis milled and then five-axis ground variant showed an increase of 8.2 % compared to the conventionally manufactured gear which indicates a high potential for further research in regard to the presented five-axis machining process chain of gears.