Refine
Year
Publication Type
- Article (96) (remove)
Language
- English (44)
- German (41)
- Multiple languages (11)
Has Fulltext
- no (96) (remove)
Keywords
- Digitaler Schatten (1)
- Fertigung (1)
- Industrie 4.0 (1)
- Infrarotkamera (1)
- Integrative Produktion (1)
- Ontologie (1)
- Rührwerkotimierung (1)
- Temperatur (1)
- Zerspanung (1)
Faculty
- Maschinenbau (MB) (96) (remove)
Numerical Model of the Railway Brake Disk for the Temperature and Axial Thermal Stress Analyses
(2022)
A user-friendly Pitot probe data reduction Excel-Refprop-Routine for non-ideal gas flow applications
(2022)
The thermal conditions like the temperature distribution and the heat fluxes during metal cutting have a major influence on the machinability, the tool lifetime, the metallurgical structure and thus the functionality of the work piece. This in particular applies for manufacturing processes like milling, drilling and turning for high-value turbomachinery components like impellers, combustion engines and compressors of the aerospace and automotive industry as well as energy generation, which play a major role in modern societies. However, numerous analytical and experimental efforts have been conducted in order to understand the thermal conditions in metal cutting, yet many questions still prevail. Most models are based on a stationary point of view and do not include time dependent effects like in intensity and distribution varying heat sources, varying engagement conditions and progressive tool wear. In order to cover such transient physics an analytical approach based on Green’s functions for the solution of the partial differential equations of unsteady heat conduction in solids is used to model entire transient temperature fields. The validation of the model is carried out in orthogonal cutting experiments not only punctually but also for entire temperature fields. For these experiments an integrated measurement of prevailing cutting force and temperature fields in the tool and the chip by means of high-speed thermography were applied. The thermal images were analyzed with regard to thermodynamic energy balancing in order to derive the heat partition between tool, chips and workpiece. The thus calculated heat flow into the tool was subsequently used in order to analytically model the transient volumetric temperature fields in the tool. The described methodology enables the modeling of the transient thermal state in the cutting zone and particular in the tool, which is directly linked to phenomena like tool wear and workpiece surface modifications.
Stagnation Flow and Heat Transfer From a Finite Disk Situated Perpendicular to a Uniform Stream
(2020)
Numerical Calibration of Three-Dimensional Printed Five-Hole Probes for the Transonic Flow Regime
(2021)
Production technology is a highly interdisciplinary field of research. It comprises different production domains (cutting, welding, forming, assembly, etc.), industry-sectors, materials and scales. Moreover, production has strong interdependencies with other scientific disciplines such as product development, materials engineering, business economics, information and communication technology, social science and natural science. Integrative Production Technology aims to develop a deep technology spanning perception to offer products matching customer and societal demands at competitive prices and to quickly adapt to market and societal changes while assuring constant and predictable product properties. The Cluster of Excellence (CoE) “Integrative Production Technology for High-Wage Countries” has initiated this special issue to present some of the newest results in the field.
Die Digitalisierung verspricht Unternehmen, die Wandlungsfähigkeit
und Produktivität bestehender Fertigungssysteme zu fördern. Durch
die Komplexität cyber-physischer Produktionssysteme liegen Produktionsdaten jedoch heterogen, unstrukturiert und isoliert vor. Die für
eine konkrete Aufgabe oder Fragestellung benötigten Daten werden
durch Digitale Schatten zielgerichtet verknüpft, abstrahiert und aggregiert, sodass eine wissensbasierte und echtzeitfähige Entscheidungsfindung in der Produktion möglich wird.
Die Entwicklung einer automatisierten Produktionssteuerung in der Holzveredelung soll logistische Potenziale nutzen und Wettbewerbsvorteile sowie die Standortsicherheit erhöhen. Dies erfordert die rechnergestützte Lösung von komplexen Optimierungsaufgaben in stark begrenzter Rechenzeit. Dieser Beitrag stellt einen Ansatz für die prozessbegleitende Optimierung innerhalb der Produktionssteuerung vor, wobei die Praxistauglichkeit der Optimierungsergebnisse im Vordergrund steht.
Einfluss der Rührwerksposition auf den Mischprozess in Biogasanlagen anhand eines Paddelrührwerks
(2019)
Confined Boiling Heat Transfer, Two-Phase Flow Patterns, and Jet Impingement in a Hele-Shaw Cell
(2017)
Optimal control problems with delays in state and control and mixed control-state constraints"
(2009)
Boiling heat transfer on large diamond and SiC heaters: The influence of thermal wall properties
(2011)
Influence of Thermophysical Wall Properties During Pool Boiling on Large Diamond and SiC Heaters
(2014)
Wertvoller Abfall
(2014)
" Rapid Prototyping"
(1996)
"Fließend Probleme lösen"
(2007)
"Mehr Heizwärme bringt Wettbewerbsvorteil - 3% ist viel" (Gasmischer für Blockheizkraftwerke)
(2010)
"Schaden begrenzen"
(2007)
"Schaden begrenzen"
(2009)