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Prof. Dr.-Ing. Nikolaus Urban

Fakultät Angewandte Naturwissenschaften und Wirtschaftsingenieurwesen

Professorinnen und Professoren

Professor

L 210

0991/3615-8279

Sortierung:
Zeitungsartikel
  • J. Hofmann
  • Nikolaus Urban

Industrie 4.0 im Elektromaschinenbau.

In: Industrieanzeiger vol. 2016 pg. 28-29

  • (2016)
Beitrag in Sammelwerk/Tagungsband
  • A. Meyer
  • A. Heyder
  • M. Brela
  • Nikolaus Urban
  • J. Sparrer
  • J. Franke

Fully automated rotor inspection apparatus with high flexibility for permanent magnet synchronous motors using an improved hall sensor line array.

IEEE pg. 1-5

DOI: 10.1109/EDPC.2015.7323196

(2015)

Beitrag in Sammelwerk/Tagungsband
  • T. Kolb
  • F. Huber
  • B. Akbulut
  • C. Donocik
  • Nikolaus Urban
  • D. Maurer
  • J. Franke

Laser Beam Melting of NdFeB for the production of rare-earth magnets.

IEEE pg. 34-40

DOI: 10.1109/EDPC.2016.7851311

(2016)

Zeitschriftenartikel
  • Nikolaus Urban
  • Alexander Meyer
  • Sven Kreitlein
  • Felix Leicht
  • Jörg Franke

Efficient near Net-Shape Production of High Energy Rare Earth Magnets by Laser Beam Melting.

In: Applied Mechanics and Materials (vol. 871) , pg. 137-144

(2017)

DOI: 10.4028/www.scientific.net/AMM.871.137

Abstract anzeigen

In this publication we report on our progress in investigating the energy efficient production of rare earth permanent magnets by Laser Beam Melting in the powder bed (LBM). This innovative additive manufacturing process offers the potential to produce magnets of complex geometries without an energy intensive oven sintering step. Another advantage that increases the efficiency of this possible new process route is the high degree of material utilization due to a near net shape production of the magnets. Hence only little material is wasted during a post processing machining step. The main challenge in processing rare earth magnet alloys by means of LBM is the brittle mechanical behavior of the material and the change in microstructure due to the complete remelting of the magnet powder. We therefor expanded the parameter study presented in previous work in order to further increase relative density and magnetic properties of the specimens. In this context process stability and reproducibility could also be increased. This was achieved by investigating the impact of different exposure patterns and varying laser spot sizes. Simultaneously to the experiments the energy consumption of the LBM process was measured and compared with conventional rare earth magnet production routes.
Zeitschriftenartikel
  • Michael Schneider
  • Nikolaus Urban
  • Alexander Meyer
  • Jörg Franke

Neuartiger Ansatz zur flexiblen Fertigung verlustoptimierter Statorblechpakete.

In: Zeitschrift für wirtschaftlichen Fabrikbetrieb (vol. 112) , pg. 225-228

(2017)

DOI: 10.3139/104.111702

Abstract anzeigen

Die elektromagnetische Messung der spezifischen Verluste von lasergeschnittenen Ringkernproben, welche mit unterschiedlichsten Parametern hergestellt wurden, haben signifikante Unterschiede hervorgebracht. Die Ergebnisse der Messungen zeigen, dass es keineswegs eine allgemeingültige Aussage zur korrekten Parameterwahl bei der Fertigung zur Erzeugung optimaler Qualität gibt. Vielmehr kann aus den Ergebnissen abgeleitet werden, dass der Betriebsfall darüber entscheidet, welcher Parametersatz für die Einzellamellen gewählt werden sollten, um möglichst geringe Eisenverlusten zu erzielen. Zur Validierung der Qualität sind manuelle Stichprobenprüfungen ungeeignet, weshalb der Bedarf für Prüfverfahren besteht, welche eine 100 %-Prüfung innerhalb der Linie ermöglichen und somit eine vollautomatische aber dennoch flexible Fertigung zu entwerfen. Eine mögliche Prüfmethode wird in diesem Beitrag aufgezeigt.
Zeitschriftenartikel
  • J. Zeitler
  • Nikolaus Urban
  • C. Kühn
  • J. Franke

Engineering von mechatronischen Baugruppen für die additive Fertigung.

In: Konstruktion (vol. 69) , pg. 67-82

(2017)

DOI: 10.37544/0720-5953-2017-11-12-67

Abstract anzeigen

Als Reaktion auf den wachsenden Einfluss der Mechatronik auf die Industrie ist die additive Fertigung inzwischen so weit entwickelt, dass sie dazu in der Lage ist, die Bedürfnisse von räumlichen, hochintegrierten und interdisziplinären Baugruppen zu erfüllen. In Form eines hybriden, rein additiven Fertigungsprozesses können sowohl mechanische Substratkörper, elektrisch leitfähige Strukturen, sowie Inlets, die während des Fertigungsprozesses integriert werden, in einem einzigen Prozess zu einer Baugruppe kombiniert werden. Um diesen neuartigen Engineeringprozess zu unterstützen, werden innovative Ansätze und Werkzeuge der Konstruktionsmethodik vorgestellt.
Beitrag in Sammelwerk/Tagungsband
  • M. Schneider
  • Nikolaus Urban
  • J. Franke

Relation of joining parameters of stator core production and iron loss.

IEEE pg. 1-6

DOI: 10.1109/EDPC.2017.8328148

(2017)

Beitrag in Sammelwerk/Tagungsband
  • Nikolaus Urban
  • Florian Huber
  • Jorg Franke

Influences of process parameters on rare earth magnets produced by laser beam melting.

IEEE pg. 1-5

DOI: 10.1109/EDPC.2017.8328149

(2017)

Zeitschriftenartikel
  • A. Meyer
  • S. Abersfelder
  • Nikolaus Urban
  • M. Schneider
  • J. Franke

Fertigungsbegleitende Qualitätskontrolle in der Elektromotorenfertigung.

In: Zeitschrift für wirtschaftlichen Fabrikbetrieb (vol. 112) , pg. 200-203

(2017)

DOI: 10.3139/104.111694

Abstract anzeigen

Permanent erregte Synchronmotoren zeichnen sich durch hochdynamisches Betriebsverhalten bei sehr guter Regelbarkeit und Leistungsdichte aus. Die Laufeigenschaften dieser Antriebe unterliegen fertigungsbedingter Abweichungen. Insbesondere die weitgehend fehlende Qualitätskontrolle des Rotormagnetfeldes vor dem Fügen von Rotor- und Statorbaugruppe lässt eine Beurteilung der Leistung sowie der Drehmomentschwankungen erst in der Endkontrolle zu. Dieser Beitrag beschreibt somit die Möglichkeiten und Potenziale einer In-Line-Qualitätskontrolle in der Rotorfertigung.
Zeitschriftenartikel
  • S. Kreitlein
  • V. Gerter
  • Nikolaus Urban
  • J. Franke

Crossbench and Evaluation of Additive Manufacturing Processes in Strategy of Sustainable and Energy Efficient Production.

In: Applied Mechanics and Materials (vol. 871) , pg. 145-152

(2017)

DOI: 10.4028/www.scientific.net/AMM.871.145

Abstract anzeigen

This paper presents the Least Energy Demand as an independent reference value for evaluating energy efficiency of additive manufacturing (AM) processes. Nowadays an essential challenge is represented by a proper evaluation and calculation of the energy efficiency of production processes. The reason for this is the lack of appropriate reference values. A comprehensive comparison of the energy efficiency is not possible without consistent reference values. However, this comparison serves as a first step towards the goal in order to reveal the actual energy savings potential of additive manufacturing procedures and to take actions on this basis. Therefore, as a first step the basic concept of the additive manufacturing principle is introduced. Subsequent the scope of the current research regarding the considered additive manufacturing techniques is illustrated. Afterwards the general system of the Least Energy Demand is presented, which serves the needs in terms of evaluating the energy efficiency of additive manufacturing processes. To sustain the comparability of the Least Energy Demand between the presented AM-procedures a solid basis for further calculations is established. Finally this paper concludes with the results of the calculated Least Energy Demands for the individual additive manufacturing processes and a comprehensive energetic comparison.
Zeitschriftenartikel
  • S. Kreitlein
  • V. Gerter
  • Nikolaus Urban
  • J. Franke

Evaluation and Assessment of Additive Manufacturing Processes Based on the Least Energy Demand in Application for Sustainable Production.

In: Applied Mechanics and Materials (vol. 871) , pg. 153-160

(2017)

DOI: 10.4028/www.scientific.net/AMM.871.153

Abstract anzeigen

This paper presents the Least Energy Demand as an independent reference value for evaluating energy efficiency of additive manufacturing (AM) processes. Nowadays an essential challenge is represented by a proper evaluation and calculation of the energy efficiency of production processes. The reason for this is the lack of appropriate reference values. A comprehensive comparison of the energy efficiency is not possible without consistent reference values. However, this comparison serves as a first step towards the goal in order to reveal the actual energy savings potential of additive manufacturing procedures and to take actions on this basis. Therefore, the first step is to define the general concept, which is used for the calculation of the Least Energy Demand. Moreover, the unit operation-specific Least Energy Demand E GM is introduced based on unit operations. In conclusion, the importance of E GM as a reference value for evaluating the energy efficiency of production processes, defined in DIN 8580, is explained. Within the scope of an application of the illustrated concept the Least Energy Demand and the Relative Energy Efficiency (REE) are calculated using the example of a selective laser melting process.
Beitrag in Sammelwerk/Tagungsband
  • Nikolaus Urban
  • Alexander Meyer
  • Moritz Leckel
  • Michael Leder
  • Jorg Franke

Additive Manufacturing of an Electric Drive a Feasability Study.

IEEE pg. 1327-1331

DOI: 10.1109/SPEEDAM.2018.8445258

(2018)

Beitrag in Sammelwerk/Tagungsband
  • K. Lomakin
  • T. Pavlenko
  • M. Sippel
  • G. Gold
  • K. Helmreich
  • M. Ankenbrand
  • Nikolaus Urban
  • J. Franke

Impact of Surface Roughness on 3D Printed SLS Horn Antennas.

Institution of Engineering and Technology pg. 1-4

DOI: 10.1049/cp.2018.1235

(2018)

Beitrag in Sammelwerk/Tagungsband
  • A. Mayr
  • M. Weigelt
  • J. Lindenfels
  • J. Seefried
  • M. Ziegler
  • A. Mahr
  • Nikolaus Urban
  • A. Kuhl
  • F. Huttel

Electric Motor Production 4.0 – Application Potentials of Industry 4.0 Technologies in the Manufacturing of Electric Motors.

IEEE pg. 1-13

DOI: 10.1109/EDPC.2018.8658294

(2018)

Zeitschriftenartikel
  • Nikolaus Urban
  • A. Meyer
  • V. Keller
  • J. Franke

Contribution of Additive Manufacturing of Rare Earth Material to the Increase in Performance and Resource Efficiency of Permanent Magnets.

In: Applied Mechanics and Materials (vol. 882) , pg. 135-141

(2018)

DOI: 10.4028/www.scientific.net/AMM.882.135

Abstract anzeigen

Powerful permanent magnets are of essential meaning for electric drives as well as for environmental friendly energy conversion in general. The main requirements for these applications are high energy products, coercivity and remanent polarization, thermal stability as well as affordable price. As state of the art, rare earth permanent magnets, frequently consisting of NdFeB based alloys, meet these requirements. When complex geometric shapes like arcs, shells or freeform surfaces are required by the application, a trade-off has to be taken into account between magnetic performance and post magnet-fabrication processing steps. Either bonded magnets can be produced with great variety of geometries while accepting low magnetic performance due to a significant amount of nonmagnetic plastic binder matrix, or sintered blocks with great magnetic performance have to be machined out to the specified shape accepting great effort for grinding or wire cutting as well as a significant loss of valuable material. To overcome the drawback of both conventional established magnet manufacturing processes, Laser Beam Melting (LBM) is investigated to provide an alternative process route for magnet production. This innovative Additive Manufacturing (AM) process offers tool less production of nearly any thinkable geometry by use of a metal powder bed fusing process. Due to the challenging material behavior, a detailed parameter study is presented including a systematic design of experiment (DoE) approach. The connection between process parameters, density and key performance indicators on the B/H-curve is broken down.
Vortrag
  • Nikolaus Urban
  • M. Kühl
  • M. Glauche
  • J. Franke

Additive Manufacturing of Neodymium-Iron-Boron Permanent Magnets.

  • IEEE.

Schweinfurt 04.-05.12.2018.

(2018)

Beitrag in Sammelwerk/Tagungsband
  • J. Lindenfels
  • Nikolaus Urban
  • A. Mayr
  • A. Meyer
  • J. Franke

Advances in Quality Monitoring of Stray Fields on Rotors of Permanent Magnet Synchronous Motors.

IEEE pg. 1-6

DOI: 10.1109/EDPC48408.2019.9012022

(2019)

Vortrag
  • Nikolaus Urban
  • L. Bauch
  • R. Armbruster
  • J. Franke

Evaluation of soft magnetic ferrosilicon FeSi6.5 for laser beam melting.

  • IEEE.

Esslingen 03.-04.12.2019.

(2019)

Beitrag in Sammelwerk/Tagungsband
  • Nikolaus Urban
  • J. Detrois
  • J. Franke

Correlation between Residual Stress, Building Angle and Illumination Parameters of Additive Manufactured FeSi6.5 and Mechanical and Magnetic Properties.

IEEE pg. 1-7

DOI: 10.1109/EDPC51184.2020.9388179

(2020)

Zeitschriftenartikel
  • M. Skalon
  • M. Görtler
  • B. Meier
  • S. Arneitz
  • Nikolaus Urban
  • S. Mitsche
  • C. Huber
  • J. Franke
  • C. Sommitsch

Influence of Melt-Pool Stability in 3D Printing of NdFeB Magnets on Density and Magnetic Properties.

In: Materials (Basel, Switzerland) (vol. 13) , pg. 139

(2020)

DOI: 10.3390/ma13010139

Abstract anzeigen

The current work presents the results of an investigation focused on the influence of process parameters on the melt-track stability and its consequence to the sample density printed out of NdFeB powder. Commercially available powder of Nd7.5Pr0.7Fe75.4Co2.5B8.8Zr2.6Ti2.5 alloy was investigated at the angle of application in selective laser melting of permanent magnets. Using single track printing the stability of the melt pool was investigated under changing process parameters. The influence of changing laser power, scanning speed, and powder layer thickness on density, porosity structure, microstructure, phase composition, and magnetic properties were investigated. The results showed that energy density coupled with powder layer thickness plays a crucial role in melt-track stability. It was possible to manufacture magnets of both high relative density and high magnetic properties. Magnetization tests showed a significant correlation between the shape of the demagnetization curve and the layer height. While small layer heights are beneficial for sufficient magnetic properties, the remaining main parameters tend to affect the magnetic properties less. A quasi-linear correlation between the layer height and the magnetic properties remanence (Jr), coercivity (HcJ) and maximum energy product ((BH)max) was found.
Beitrag in Sammelwerk/Tagungsband
  • Nikolaus Urban
  • M. Masuch
  • J. Paduch
  • J. Franke

An Approach to Eddy Current Reduction in Laser Powder Bed Fused High Silicon Steel Considering Manufacturing Influences.

IEEE pg. 1-5

DOI: 10.1109/EDPC53547.2021.9684214

(2021)

Beitrag in Sammelwerk/Tagungsband
  • M. Kratzer
  • J. Mayer
  • F. Höfler
  • Nikolaus Urban

Decision Support System for a Metal Additive Manufacturing Process Chain Design for the Automotive Industry.

  • In:
  • C. Klahn
  • M. Meboldt

Cham: Springer International Publishing pg. 469-482

DOI: 10.1007/978-3-030-54334-1_33

(2021)

Hochschulschrift
  • Nikolaus Urban

Untersuchung des Laserstrahlschmelzens von Neodym-Eisen-Bor zur additiven Herstellung von Permanentmagneten.

Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen-Nürnberg. Lehrstuhl für Fertigungsautomatisierung und Produktionssystematik (FAPS)

(2022)

Beitrag in Sammelwerk/Tagungsband
  • Nikolaus Urban
  • C. Vogel
  • T. Brunner
  • Ludwig Gansauge

Collaborative Electromechanical Engineering: A Concept to Overcome Domain- and IT-System Borders.

IEEE pg. 127-134

(2024)

Labore

Anwendungslabor Industrie 4.0