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Study on dependency of the weld geometry on process parametres in laser hybrid welding of austenitic stainless steel
Jireš, Daniel ; Daněk, Ladislav (referee) ; Mrňa, Libor (advisor)
The project has been solved during the bachelor´s degree of engineering technology examines the the influence of laser hybrid welding austenitic stainless steel ČSN 17240 (DIN 1.4301). This steel is the most widely used type of stainless steel, recommended for use in aggressive environments such as a swimming pools, laboratories or facilities in contact with sea water. The test specimens, which were performed on the weld bead at different speeds and other welding parameters, were metallographicly investigated. The results showed that the highest geometric parameters such as depth and width of the weld pool have the samples with welding speed v = 10 mm s-1, the smallest geometrical parameters have the samples with the welding speed v = 30 mm s-1.
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Production of Parts into the Injection Mold
Pilarčík, Edmund ; Jaroš, Aleš (referee) ; Kalivoda, Milan (advisor)
This project processes technology of production of parts into the injection mold in given conditions of ROTEK s.r.o. company, focusing on exploitation of electric discharge machinig. The project consists of constructive – technological analysis of part, proposal of technological procedure suitable for possibilities of the company, simulation of certain manufacturing processes and technological-economic assessment of satisfactory solutions of manufacturing process in company.
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Fuel cell and vehicles
Zlámal, Josef ; Kloss, Ondřej (referee) ; Kaplan, Zdeněk (advisor)
In the first part of this work a historical development of fuel cell, description of its construction and function including a comparison of currently used fuel cells is presented. The next part of this work is focused on fuel for fuel cells, its production, distribution and storage. The last chapters are dealing with fuel cell automobile, project of particular car companies and author´s assessment of individual fuel cell systems.
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Fuell cells
Sedláček, Tomáš ; Elcner, Jakub (referee) ; Hejčík, Jiří (advisor)
This bachelor thesis describes the distribution of fuel cells, principle of their operation and composition of the individual cell types. It states the advantages or disadvantages of the individual cell types and summarizes their basic parameters. This thesis also refers to the current state of development of fuel cells and convenient areas of their application.
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Fuel cells in personal transport
Říha, Stanislav ; Blaťák, Ondřej (referee) ; Zháňal, Lubor (advisor)
This thesis is oriented to historical evolution of fuel cell, his total analysis, description of single disadvantage and advantage with which fuel cells battle. An other reason for urgency of using alternative fuel, brief description of car market and possible guess of fuel cell's future in personal transport are involved in an other part of this thesis. The end of the thesis deal with cars of fuel cells split in parts according to single car companies.
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New Characterisation Approaches for Carbon Ionic Liquid Electrodes (CILES)
Mikysek, T. ; Stočes, M. ; Švancara, I. ; Vytřas, K. ; Ludvík, Jiří
Within this study, some new approaches to characterize the carbon paste mixtures and the respective carbon ionic liquid electrodes (CILEs) are presented and their properties discussed. Particular attention has been paid to the changes of the resistivity, relative to the dependence on composition of the CILE. Three types of carbon ionic liquid pastes were examined, and for the interpretation of experimental data, the results were compared with those of "classic" carbon paste electrode (CPE) based on graphite powder. Some problems connected with homogeneity and stability of carbon pastes are also discussed.
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