Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 28 for “"process chain"”.
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Evaluation of alternative pretreatment methods for use in direct filtration water treatment
… portion of a water treatment process and to study the implications of the results with respect to future use in direct filtration. The performance of the coagulant, coagulant aid, and primary coagulant polymer was evaluated by altering the flocculation and sedimentation …
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Entwicklung prozessoptimierter Werkzeugtechnologien anhand eines seriennahen Zielbauteiles beim Thixoschmieden von Stahl
In the process Thixoforging (forging in the semi-solid state) the advantages of the processes forging and casting can be combined. For example, complex geometries, which are normally produced in 4 or 5 steps, can be realised in one or two steps. In contrast to the forming of aluminium alloys in the …
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Integration of component-based frameworks with sensor modeling languages for the sensor web
… language). An important part of SensorML is its process model. Each sensor in the real world is depicted in SensorML by a process model, whereas the connections between the sensors are shown by a process chain. This thesis presents a translator that reads these documents and converts them to Java …
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Methodisches System zur Auslegung von kostenoptimalen und prozessstabilen Fertigungsverkettungen
… definition of manufacturing tolerances along the process chain can be achieved by a selective precocious, cost-optimal and stable manufacturing planning. This was carried out by a development of a framework system for the cost-optimal and stable design of manufacturing chains without prior …
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Ultraschall zur Erfassung innerer Freiformgeometrien auf Werkzeugmaschinen
… by real parts in practice, as well as the whole process chain for the form optimisation.
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Modularer Ansatz zur Simulation verfahrensübergreifender fertigungstechnischer Prozessketten
… now, the targeted development of manufacturing process simulations has introduced the benefits of numerical computation methods to the manufacturing domain. Simulation experiments are thereby intended to replace iterative optimisation cycles during production. In spite of the irrefutable …
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Ganzheitliche Bilanzierung der Energiebereitstellung für die Aluminiumherstellung
… to balance energy supply structures based on process chain analysis, used the primary aluminium production as an example. Within this analysis the proper electricity supply for aluminium production is processed. The often used hydro power for aluminium production will be analysed focussed on …
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Effects of Hot Isostatic Pressing on Copper Parts Additively Manufactured via Binder Jetting
… together of powders) from energy supply (post-process sintering). However, it is challenging to fabricate parts of high density using this method due to low packing density of powder while printing. This work aims to investigate the effects of Hot Isostatic Pressing (HIP) as a secondary …
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Einfluss der Prozesskette auf die Feinkornbeständigkeit von mikrolegierten Einsatzstählen
Considering the processing of case hardening steel components, the machining as well as the heat treatment offer great capability for cost savings. By increasing the carburising temperature from today approximately 940°C up to e.g. 1050°C significant process time reductions are achievable due to …
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Additive manufacturing of polyolefins via powder bed fusion
… fusion (PBF) is an additive manufacturing (AM) process in which a fine polymer powder is selectively heated and melted using infra-red (IR) energy from a CO2 laser to melt the powder and coalesce the molten polymer together to form each layer. Semi-crystalline polymers are the most common …
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Analysis of hydrogen-based energy storage pathways
… (PEMFC, SOFC or combined cycle gas turbine). All processes are simulated with respect to their full and part-load efficiencies and resulting costs. Furthermore, load profiles are estimated to simulate a whole year of operation at varying loads. The results show power-to-power exergy efficiencies …
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Nonlinear Finite Element Modeling and Analysis of Metal Hot Forming for Automotive Weight Reduction
… developed methodology is applied to the forming process of a transmission clutch hub which is constructed from UHSS 22MnB5 for the purpose of automotive lightweighting. The entire process chain is considered, including the hot stamping process, in which a high temperature blank enters a stamping …
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An application protocol for near net shape technologies implementation
… and lead times in established manufacturing processes. However identifying candidate NNS processes and optimizing their implementation is frequently done in an adhoc manner without the benefits of a structured process of discovery and assessment. Motivated by the need for more robust …
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Untersuchungen zum Fräsen mit CVD-diamantbeschichteten Werkzeugen
… coatings are usually produced in a multiple step process chain. The substrate (either inserts or shaft tools) will be cleaned, etched and finally coated. Etching removes the cobalt binder from the rim zone of the carbide. This supports the diamond formation and the adhesion to the substrate. But …
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Improvements in Liquid Composite Moulding through Assessment of Process Parameters
… (LCM) describes a family of manufacturing processes utilised for the manufacture of fibre reinforced plastics. With a large number of variables and process parameters requiring active measurement and control, achieving high quality simultaneously with low cost and variability has proven an …
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Automatisierte Objektidentifikation und Visualisierung terrestrischer Oberflächenformen
Die automatisierte Objektidentifikation stellt ein modernes Werkzeug in den Geoinformationswissenschaften dar (BLASCHKE et al., 2012). Um bei thematischen Kartierungen untereinander vergleichbare Ergebnisse zu erzielen, sollen aus Sicht der Geoinformatik Mittel für die Objektidentifikation …
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Methodik zur Angebotspreisbildung, am Beispiel des Werkzeug- und Formenbaus
… or die, the resulting part and the production process are taken into consideration. The company objectives of the supplier and customer are represented in a data model for objectives. The method price determination is based on a comparison of the performance offered by the supplier and the …
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Life Cycle Analysis of Greenhouse Gas Emissions from the Mining and Milling of Uranium in Saskatchewan
… based on the ISO 14040:2006 standard using a Process Chain Analysis methodology. This study differs from previous studies of GHG emissions intensity during the uranium mining-milling phase of the nuclear fuel cycle in two key respects. First, it has a very large system boundary which includes …
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Structuring process models
… the ideas of Donald E. Knuth to conclude that process modeling is both a science and an art. Process modeling does have an aesthetic sense. Similar to composing an opera or writing a novel, process modeling is carried out by humans who undergo creative practices when engineering a process …
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Cyber-Physical Security for Additive Manufacturing Systems
… a detailed analysis of vulnerabilities in the AM process chain and how these attack vectors could be used to execute malicious part sabotage attacks. This work demonstrated the ability of an internal void attack on the .STL file to reduce the yield load of a tensile specimen by 14% while escaping …
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