TY - CONF AU - Brinker, Klaus AU - Hüllermeier, Eyke ID - 15013 T2 - Proceedings ECML/PKDD, European Conference on Machine Learning and Knowledge Discovery in Databases TI - A Reduction of Label Ranking to Multiclass Classification ER - TY - CONF AU - Hüllermeier, Eyke AU - Couso, Ines AU - Diestercke, Sebastian ID - 15014 T2 - Proceedings SUM 2019, International Conference on Scalable Uncertainty Management TI - Learning from Imprecise Data: Adjustments of Optimistic and Pessimistic Variants ER - TY - JOUR AU - Henzgen, Sascha AU - Hüllermeier, Eyke ID - 15015 JF - ACM Transactions on Knowledge Discovery from Data SN - 1556-4681 TI - Mining Rank Data ER - TY - CONF AB - Abstract. Within the scope of this study, an intrinsically lubricated deep drawing die fabricated via laser beam melting (LBM) is investigated. In contrast to the common objective of generating highly dense LBM components, this work endeavors to achieve intended micro-scale porosity. By utilizing permeable structures, in-process closed-loop control of lubrication during the forming operations is feasible. Based on a modified AM scan strategy, the required filigree, porous structures can be generated. Thus, in the present work three permeable specimens are additively generated from the maraging steel 1.2709. The cylindrical specimens are then analyzed via light microscopy (LM), microcomputer tomography (microCT), and with regard to the oil throughput rate. Subsequently, an intrinsically lubricated, AM deep drawing tool die is manufactured and experimentally tested. The findings reveal interesting results for deep drawn specimens with AM deep drawing dies. AU - Bader, Fabian AU - Hengsbach, Florian AU - Hoyer, Kay-Peter AU - Homberg, Werner AU - Schaper, Mirko ID - 15024 T2 - PROCEEDINGS OF THE 22ND INTERNATIONAL ESAFORM CONFERENCE ON MATERIAL FORMING: ESAFORM 2019 TI - Intrinsically lubricated tool inserts for deep drawing applications generated by selective laser melting ER - TY - JOUR AB - Friction-spinning is an incremental forming process, which is accompanied by complex thermal and mechanical loads in the tool and the formed part. To influence the process temperature, two main process parameters, i.e. the rotation speed and the feed rate, can be adapted. With the objective to improve the tool performance and the quality of the workpiece, this study focuses on a coating concept for friction-spinning tools made of high speed steel (HS6 5 2C, 1.3343). On the one hand, atmospheric plasma sprayed (APS) Al2O3 and ZrO2-8Y2O3 coatings serve as a thermal insulator, and, on the other hand, physically vapor deposited (PVD) TiAlSi7.9N and CrAlSi7.5N films are applied to increase the hardness and wear resistance of the tools. In addition, duplex coatings, combining the APS and PVD technique, are synthesized to influence both the heat transfer and the tribological properties of friction-spinning tools. Subsequently, all coated tools are tested in a friction-spinning process to form flanges made of AW-6060 (AlMgSi 3.3206) tube materials. The tool temperatures are determined in-situ to investigate the impact of the tool coating on the process temperature. Compared to an uncoated tool, the alumina and zirconia coatings contribute to a reduction of the tool temperature by up to half, while the PVD films increase the hardness of the tool by 20 GPa. Furthermore, it is shown that the surface quality of thermally sprayed (TS) or PVD coated tools is directly related to the surface roughness of the resulting workpiece. AU - Tillmann, Wolfgang AU - Fehr, Alexander AU - Stangier, Dominic AU - Dildrop, Markus AU - Homberg, Werner AU - Lossen, Benjamin AU - Hijazi, Dina ID - 15028 JF - Production Engineering SN - 0944-6524 TI - Al2O3/ZrO2-8Y2O3 and (Cr,Ti)AlSiN tool coatings to influence the temperature and surface quality in friction-spinning processes ER - TY - THES AB - Working-media-based forming processes (WMBF) represent a great potential regarding the production of complex sheet-metal lightweight components with excellent surface quality, shape accuracy and dimensional stability. The working-media-based forming processes characterize the sheet-metal forming process, where the sheet metal blank is formed during the forming process by means of a (quasi-)static or dynamic working media pressure into a contouring forming tool. Although the WMBF offers improved utilization of the formability of the used materials compared to conventional sheet metal forming processes, there are limits in the production of complex deeper or sharp edged components with (quasi-)static and dynamic WMBF processes, which can not be overcome by using these methods alone. In order to overcome this, multi-level WMBF process sequences for components with spherical and stepped geometries are developed in this work. Here the developed strategies combine the advantages of (quasi-)static and dynamic WMBF processes. Furthermore, based on analytical, experimental and numerical investigations, innovative process management strategies were derived, which completely compensate the local wall thickness changes, make better use of existing material resources and thus enable the safe production of mentioned geometries. AU - Djakow, Eugen ID - 15030 KW - High Speed Forming TI - Ein Beitrag zur kombinierten (quasi-)statischen und dynamischen Umformung von blechförmigen Halbzeugen ER - TY - JOUR AU - Linnemann, M. AU - Psyk, V. AU - Djakow, Eugen AU - Springer, R. AU - Homberg, W. AU - Landgrebe, D. ID - 15031 JF - Procedia Manufacturing SN - 2351-9789 TI - High-Speed Incremental Forming – New Technologies For Flexible Production Of Sheet Metal Parts ER - TY - JOUR AU - Piper, M. AU - Zibart, A. AU - Djakow, Eugen AU - Springer, R. AU - Homberg, W. AU - Kenig, E.Y. ID - 15036 JF - Applied Thermal Engineering SN - 1359-4311 TI - Heat transfer enhancement in pillow-plate heat exchangers with dimpled surfaces: A numerical study ER - TY - CONF AU - Hartel, Rita AU - Dunst, Alexander ID - 15080 SN - 0302-9743 T2 - International Conference on Multimedia Modeling, MMM TI - How Good Is Good Enough? Establishing Quality Thresholds for the Automatic Text Analysis of Retro-Digitized Comics ER - TY - JOUR AU - Bolenz, Lukas AU - Fischer, Florian AU - Toye, Dominique AU - Kenig, Eugeny ID - 15121 JF - Chemie Ingenieur Technik SN - 0009-286X TI - Tomographische Untersuchung der Fluiddynamik viskoser Systeme in Packungskolonnen ER - TY - JOUR AU - Bolenz, Lukas AU - Toye, Dominique AU - Kenig, Eugeny ID - 15123 JF - Chemical Engineering Transactions TI - Liquid Flow Morphology of Viscous Systems in Structured Packings: Investigations by X-ray Tomography VL - 74 ER - TY - GEN AU - Bolenz, Lukas AU - Toye, Dominique AU - Kenig, Eugeny ID - 15125 TI - Tomographische Untersuchung der Fluiddynamik viskoser Systeme in Packungskolonnen ER - TY - GEN AU - Bolenz, Lukas AU - Toye, Dominique AU - Kenig, Eugeny ID - 15126 TI - Experimental and theoretical investigation of fluid dynamics in structured packings ER - TY - GEN AU - Bolenz, Lukas AU - Toye, Dominique AU - Kenig, Eugeny ID - 15128 TI - Liquid Flow Morphology of Viscous Systems in Structured Packings: Investigations by X-ray Tomography ER - TY - GEN AU - Salten, Alexander Heinrich Johannes AU - Maćkowiak, Jan F. AU - Maćkowiak, Jerzy AU - Kenig, Eugeny ID - 15145 TI - Modellierung des Stofftransports in Füllkörperkolonnen mit dem Ansatz der hydrodynamischen Analogien ER - TY - JOUR AU - Rieks, Sebastian AU - Wende, Marc AU - Preußer, Niklas AU - Gambaryan-Roisman, Tatiana AU - Kenig, Eugeny ID - 15148 JF - Chemical Engineering Research and Design SN - 0263-8762 TI - A hydrodynamic analogy based modelling approach for zero-gravity distillation with metal foams VL - 147 ER - TY - GEN AU - Wende, Marc AU - Kenig, Eugeny ID - 15149 T2 - Jahrestreffen der ProcessNet-Fachgruppe Wärme- und Stoffübertragung TI - Modellierungsansatz zur Simulation von Gravidestillation mit Metallschäumen ER - TY - GEN AU - Wende, Marc AU - Staggenborg, Christoph AU - Kenig, Eugeny ID - 15154 T2 - Workshop Wärmeübertragung mit Phasenwechsel in fluiden Systemen: Ein Update TI - Simulation von Gravidestillationsprozessen mit Metallschäumen ER - TY - CONF AU - Feldmann, Nadine AU - Jurgelucks, Benjamin AU - Claes, Leander AU - Henning, Bernd ID - 15164 T2 - 2019 International Congress on Ultrasonics TI - A sensitivity-based optimisation procedure for the characterisation of piezoelectric discs ER - TY - JOUR AU - Jenert, Tobias AU - Brahm, Taiga AU - Naeve-Stoß, Nicole ID - 15173 JF - bwpat TI - Fachbezogene Reflexion in der beruflichen Lehrer*innenbildung VL - 37 ER -