|
|
Use of 3D printing technology for the design of spare parts production
Šafl, Pavel ; Zimáková, Jana (referee) ; Binar, Tomáš (advisor)
This seminar thesis deals with the issue of 3D printing in companies. The aim was to describe additive manufacturing and 3D printing technologies. Moreover, to select the most common materials which are used and describe them. It was also necessary to perform a study of mechanical stresses and prepare a detailed description of the mechanical properties of materials. From these data, methods of use in the automotive industry were described. The most important part was to introduce case studies and create a description of which 3D printing technologies have the fastest return on investment.
|
|
|
History of protection relays
Šafl, Pavel ; Koudelka, Jan (referee) ; Bukvišová, Zuzana (advisor)
The bachelor thesis deals with mapping the origin and history of electrical pro-tections. The work outlines the circumstances and the new types of protection. It expla-ins and introduces problems encountered in the development and operation of historical protections. On the overcurrent protection AB31, AT31 and REF615, the tripping characte-ristic was measured to evaluate and compare modern digital protection and historical electromagnetic protection. Dependent protection AB31 has been tested and measured for its dependent characteristics and the AT31 protection has been checked for short-circuit current capability. Both of these protections were compared and evaluated with the REF615 digital protection. The measurement results and calculations are processed into well-arranged tables and graphs that are part of the work. The last part of this thesis is the selection of suitable protections for describing and making small exposures.
|
|
|
History of protection relays
Šafl, Pavel ; Koudelka, Jan (referee) ; Bukvišová, Zuzana (advisor)
The bachelor thesis deals with mapping the origin and history of electrical protections. The work outlines the circumstances and the new types of protection. It expla-ins and introduces problems encountered in the development and operation of historical protections. On the overcurrent protection AB31, AT31 and REF615, the tripping characte-ristic was measured to evaluate and compare modern digital protection and historical electromagnetic protection. Dependent protection AB31 has been tested and measured for its dependent characteristics and the AT31 protection has been checked for short-circuit current capability. Both of these protections were compared and evaluated with the REF615 digital protection. The measurement results and calculations are processed into well-arranged tables and graphs that are part of the work. The last part of this thesis is the selection of suitable protections for describing and making small exposures.
|
|
|
Vacuum technologies for creating thin-film systems
Kuchařík, Jan ; Šafl, Pavel (referee) ; Zatloukal, Miroslav (advisor)
The theoretical part of this theses deals with the formation of thin films by vacuum methods. It is a chemical and physical deposition from the gas phase in vacuum environment. Chemical deposition takes place at elevated temperatures, which accelerate reactions. Physical deposition is most often only condensation of vapors of evaporated material. Physical methods are vacuum evaporation, as well as cathodic, ionic, reactive and magnetron sputtering. The formation of thin layers takes place according to 3 known mechanisms. Substrates must be surface treated before the deposition process. The quality of thin films is examined from several perspectives. The practical part is devoted to the production of a thin-film system of copper and tin on a glass substrate. These layers are separated by three different barrier metals. Subsequently, the prepared samples were exposed to thermal stress and were monitored by electron microscope. Diffusion processes at the thin film interface were compared.
|
|
|
Assessment of the use of 3D printing technology in industry
Blecha, Miroslav ; Šafl, Pavel (referee) ; Binar, Tomáš (advisor)
This bachelor's thesis deals with the issue of 3D printing of polymer materials. The aim of the theoretical part is to describe the history, basic technologies and materials of 3D printing. Attention was also paid to various climatic influences related to the degradation of polymers. The experimental part deals with the mechanical testing of test specimens printed from two selected materials, one of which is further chosen for loading in the climatic chamber. An electron microscope was also used during the research in order to observe fracture surfaces. The results from the mechanical tests of hardness, toughness and tensile strength were evaluated and based on them a case study was then developed regarding the IVECO 4x4 MRV vehicle.
|
|
|
Creation of a web application to select polymer materials based on mechanical properties for 3D printing
Kaziměrčíková, Lada ; Šafl, Pavel (referee) ; Binar, Tomáš (advisor)
This diploma thesis deals with 3D printing with a focus on the FDM method. Main objective of the thesis is to develop a web application which would assist in the selection of suitable polymer materials for FDM print, based on the required mechanical properties. The web application was created in Python with the usage of Flask framework and MySQL database. In order to develop this application, it was necessary to create an overview of material properties, mainly mechanical parameters and degradation mechanisms. Subsequently, testing in a climatic chamber was done, and also hardness and tensile tests for degraded samples. The collected data serves as the base of the understanding how given mechanical parameters may affect selection of the polymer material. The thesis then offers a practical instrument to help choose right material for FDM printing projects.
|
|
|
Use of 3D printing technology in the automotive industry
Hyhlík, Pavel ; Šafl, Pavel (referee) ; Binar, Tomáš (advisor)
This thesis deals with 3D printing technology and its applicability to the automotive industry. It discusses the types of technology, the materials used for 3D printing, required software and the specific applications. One of the materials is selected and analyzed for its properties, after which spare parts are designed and manufactured from it. The thesis includes a case study looking at the economic viability of additive manufacturing for engineered parts.
|
|
|
Vacuum technologies for creating thin-film systems
Kuchařík, Jan ; Šafl, Pavel (referee) ; Zatloukal, Miroslav (advisor)
The theoretical part of this theses deals with the formation of thin films by vacuum methods. It is a chemical and physical deposition from the gas phase in vacuum environment. Chemical deposition takes place at elevated temperatures, which accelerate reactions. Physical deposition is most often only condensation of vapors of evaporated material. Physical methods are vacuum evaporation, as well as cathodic, ionic, reactive and magnetron sputtering. The formation of thin layers takes place according to 3 known mechanisms. Substrates must be surface treated before the deposition process. The quality of thin films is examined from several perspectives. The practical part is devoted to the production of a thin-film system of copper and tin on a glass substrate. These layers are separated by three different barrier metals. Subsequently, the prepared samples were exposed to thermal stress and were monitored by electron microscope. Diffusion processes at the thin film interface were compared.
|
|
|
Use of 3D printing technology for the design of spare parts production
Šafl, Pavel ; Zimáková, Jana (referee) ; Binar, Tomáš (advisor)
This seminar thesis deals with the issue of 3D printing in companies. The aim was to describe additive manufacturing and 3D printing technologies. Moreover, to select the most common materials which are used and describe them. It was also necessary to perform a study of mechanical stresses and prepare a detailed description of the mechanical properties of materials. From these data, methods of use in the automotive industry were described. The most important part was to introduce case studies and create a description of which 3D printing technologies have the fastest return on investment.
|
|
|
History of protection relays
Šafl, Pavel ; Koudelka, Jan (referee) ; Bukvišová, Zuzana (advisor)
The bachelor thesis deals with mapping the origin and history of electrical protections. The work outlines the circumstances and the new types of protection. It expla-ins and introduces problems encountered in the development and operation of historical protections. On the overcurrent protection AB31, AT31 and REF615, the tripping characte-ristic was measured to evaluate and compare modern digital protection and historical electromagnetic protection. Dependent protection AB31 has been tested and measured for its dependent characteristics and the AT31 protection has been checked for short-circuit current capability. Both of these protections were compared and evaluated with the REF615 digital protection. The measurement results and calculations are processed into well-arranged tables and graphs that are part of the work. The last part of this thesis is the selection of suitable protections for describing and making small exposures.
|
guest ::
