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Surface heat treatment after 3D FDM print
Břoušek, Lukáš ; Slaný, Martin (referee) ; Zemčík, Oskar (advisor)
The topic of diploma thesis are surface heat treatments after 3D print by method Fused Deposition Modeling. In the introduction is located recherche of the given issue. Further, we describe the construction and process of the 3D printer construction, on which will be printed samples for experiments in the next part of the thesis. The aim is to determine the behavior and changes of surface structures of heat-affected samples from different materials. Furthermore, the suitability of the used methods and the possibility of their use in practice.
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Restoring of the ventilation shaft generator
Veselý, Libor ; Slaný, Martin (referee) ; Kalivoda, Milan (advisor)
The subject of this work is the repair of an air-handling unit. Possible causes of the problem are analyzed and multiple solutions are proposed. The first variant considers the refurbishment of the damaged component using thermal spray technology, including the choice of the best method. The second solution proposes the manufacture of a new part using machining in the environment of the company. This process requires an intermediate product to be made, and the choice of the correct machines from what the company has available, choice of the right tools and cutting conditions. The technical-economical evaluation compares the the expenses tied with both of the solutions. The chosen repair solution was used for the repair of the air-handling unit.
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Effect of air temperature on FDM 3D printing
Hrdlička, Martin ; Slaný, Martin (referee) ; Zemčík, Oskar (advisor)
The thesis deals with 3D printing by the FDM and ambient temperature on print quality. The thesis describes the principle of printing by the FDM method and the occurrence of errors caused by the influence of ambient temperature. The aim of the thesis is to design a heated chamber for RepRap Prusa i3 printer, its construction and subsequent testing of ambient temperature influence on print quality. To test the occurrence of the described errors, specific tests and materials are selected in the work. The result of this work is the recommended ambient temperature in the heated chamber for improved FDM printing.
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Geometry Correction of a Prototype Part using the Reverse Engineering Technology
Smejkal, Martin ; Sedlák, Josef (referee) ; Slaný, Martin (advisor)
This bachelor thesis summarises some modern engineering technologies, namely Reversed Engineering, Rapid Prototyping and Soft-tooling. The Theory chapter describes the mentioned technologies in details and an extra attention is paid to those used in the Experimental chapter. The Experimental chapter summarises steps involved in a prototype part manufacturing. Specifically, in this thesis the method of Reversed Engineering includes 3D scanning followed by smoothing and adjusting of the obtained point cloud in the GOM Inspect V8 software. The final 3D CAD model is obtained in the Catia software. For the Rapid Prototyping the 3D CAD model was 3D printed using the FDM technology. The obtained 3D printed master model was used to prepare a silicone mould that was subsequently used to create an identical part by the method of Soft-tooling. The original part and parts obtained by 3D printing and moulding were compared in the GOM Inspect V8 software by the method of Surface Analysis.
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HSS end milling cutters with PVD coatings and their use in practice
Vondra, Jiří ; Slaný, Martin (referee) ; Jaroš, Aleš (advisor)
This diploma thesis deals with the durability of PVD coating in front groove milling. In the theoretical part there is the analysis of high-speed steels, a survey of milling and an overview of coating methods. The experimental part is focused on the power ratios during milling with a router cutter and its wear. From the experiment it is possible to conclude that nanocomposite coatings reduce cutting forces, but do not produce the most durable tool under the cutting conditions.
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Selection of appropriate technology for the production of welded constructions of boiler JE 12 and JE 6
Janás, Milan ; Slaný, Martin (referee) ; Dvořák, Jaromír (advisor)
The diploma thesis on the selection of appropriate technology to produce the welded construction of electric boiler JE6 / 12 aims to evaluate available production technologies and choose the most suitable of them. Choosing the technologies focuses primarily on those that are available at Slokov. Due to the connection of the welding robot to the production, it is necessary to consider the overall connection of the production and the high accuracy of the production. The individual methods of production, material separation, welding, bending and surface treatment are first theoretically analyzed and their advantages, disadvantages and parameters are summarized. Subsequently, it is practically tested individual technologies for a representative part and it evaluates the achieved parameters and economics of production. With the results obtained, the most suitable technologies are selected. With the selection of technologies, there is a need for a change in design and production parameters. Changes and modifications to the design describe another point. To achieve maximum efficiency and quality of production, a welding robot is used to make welds. The description of the production, modifications and overall design of the robot describes the next point of this work. The last part summarizes the economics of selected production technologies and details the technological process. The aim of the thesis is to design such technologies that will be advantageous from the point of view of the economy and from the perspective of the available possibilities of the company.
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Investment in Transmission Mechanism of Inflation Targeting
Kučera, Lukáš ; Brůna, Karel (advisor) ; Slaný, Martin (referee) ; Mach, Miloš (referee)
The dissertation thesis is devoted to the topic of investment with emphasis on their position within the transmission mechanism of inflation targeting. It discusses starting-points of inflation targeting regime, individual transmission channels of monetary policy including their connections, and routes through which the central bank may influence the investment. There are analyzed selected investment theories and other theoretical models that are associated with the investment. Factors, whose changes may induce changes in investment, are derived using the intersection of these two analyzed aspects. They are variables, which flow from a theoretical analysis of transmission channels, as well as variables, that are not directly accented within these channels, but they can be affected by the central bank. Even factors, that are not within the competence of the central bank, are included among the variables. Using available data, sources of investment variability are verified on data for the Czech Republic. Basic empirical analysis of time series and correlation analysis are performed and the vector error correction model is compiled.
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Analysis of the impact of the proposed introduction of excise tax on still wines if applied on market subjects and company Vinium a.s.
Kurka, Vladimír ; Chytil, Zdeněk (advisor) ; Slaný, Martin (referee)
The thesis deals with possible impacts of non-zero rate of excise tax on still wine if applied on market subjects which means consumers, producers and the government. Function of price elasticity demand for wine in the Czech Republic is created and using regression analysis is found that demand for wines in the Czech Republic is inelastic. Original hypothesis that introduction of excise tax of 10 CZK per one litter of still wine would not positively impact any of affected subjects has not been confirmed. Demand for still wine would be reduced if excise tax was exercised and therefore producers and customers would be harmed but the analysis shows that the government would increase its tax collection. Another finding is that cheap wines are more price elastic and impact of tax growth on demand for these wines would be greater than in case of more expensive wines. Results of research are applied on the VINIUM Company and its financial statements with finding that introduction of excise tax would probably lead to bankruptcy of the company.
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Problems with the Phillips curve in developed economies
Krupička, Michal ; Babin, Jan (advisor) ; Slaný, Martin (referee)
My bachelor thesis focuses on the problems of the Phillips curve. Theoretical part is monitoring the development of the Phillips curve. In this part I describe the process of examination of this problem, that had begun a long time before introduction to work of A. W. Phillips. There are also mentioned works related to the Phillips work that were published after his paper and also some of the critics of the model. In practical part I constructed models to verify validity of the Phillips curve. Data of the Czech Republic and the United States of America were used in this part. Conclusion of practical part confirms that the validity of the Phillips curve is quite limited and that the practical use of the Phillips curve to influence the economy is not possible with this model.
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