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Optical connections and their influence on transmission
Jaroš, Pavel ; Šporik, Jan (referee) ; Tejkal, Vladimír (advisor)
The aim of this bachelor‘s thesis is to evaluate the current options of connecting optical fibres and their application in specific situations. Firstly, I will deal with fiber optic system and its components in detail. Then, this topic will be futher developed by discussing fibre connection problems, fusion splicing for making permanent fiber join, mechanical splice and, most of all, optical connectors. In following chapters I introduce mathematical dependence of attenuation on the relative possition of the ends of fibers. Another aim of the work was to create an application in a suitable programming enviroment, which will be used for design of optical path.
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The effectiveness of welding on furnace structures.
Rousová, Michaela ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
This diploma thesis is resolving all the possibilities of enhancing the efficiency of furnace structures welding. Small batch production does not offer many possibilities for implementing mechanization or automation. On the other hand, when using a big batch production, efficiency can be enhanced by means of a robotic workstation. When the production batch is big enough, we will see a costs save after a short time, mainly in labor costs. This means the return of investments will be in short time period. In the LAC company there are three types of products made. At laboratory furnaces the efficiency can be enhance by using fixtures. At other standard and atypical furnaces is very difficult to design fixtures or positioners because of their different sizes. Big complication can be also a company location on second floor. The most suitable product regarding to welding efficiency enhancement is big batch production of heaters. For this type the welding time can be shortened by means of a robotic workstation.
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Charakteristika a metody tavného svařování
Hrabčík, Jiří
This bachelor thesis is focused on characterization of methods of fusion welding. The methods are characterized according to their function and area of application, which is different for all of these methods. Every method is also analyzed with regard to its fundamental principle along with the advantages and disadvantages. Moreover, the thesis defines the particular field of use for every single method. Furthermore, the work is focused on defects that may arise at the site of the weld bead, or in the heat affected zone surrounding the weld. Individual defects are characterized by their origin and effect on mechanical or technological properties of the welded material. The last part is focused on the TIG method and provides descriptions of welding equipment, application areas and the basic principle of these methods.
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Charakteristika a metody tavného svařování
Hrabčík, Jiří
This bachelor thesis is focused on characterization of methods of fusion welding. The methods are characterized according to their function and area of application, which is different for all of these methods. Every method is also analyzed with regard to its fundamental principle along with the advantages and disadvantages. Moreover, the thesis defines the particular field of use for every single method. Furthermore, the work is focused on defects that may arise at the site of the weld bead, or in the heat affected zone surrounding the weld. Individual defects are characterized by their origin and effect on mechanical or technological properties of the welded material. The last part is focused on the TIG method and provides descriptions of welding equipment, application areas and the basic principle of these methods.
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Optical connections and their influence on transmission
Jaroš, Pavel ; Šporik, Jan (referee) ; Tejkal, Vladimír (advisor)
The aim of this bachelor‘s thesis is to evaluate the current options of connecting optical fibres and their application in specific situations. Firstly, I will deal with fiber optic system and its components in detail. Then, this topic will be futher developed by discussing fibre connection problems, fusion splicing for making permanent fiber join, mechanical splice and, most of all, optical connectors. In following chapters I introduce mathematical dependence of attenuation on the relative possition of the ends of fibers. Another aim of the work was to create an application in a suitable programming enviroment, which will be used for design of optical path.
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|
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The effectiveness of welding on furnace structures.
Rousová, Michaela ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
This diploma thesis is resolving all the possibilities of enhancing the efficiency of furnace structures welding. Small batch production does not offer many possibilities for implementing mechanization or automation. On the other hand, when using a big batch production, efficiency can be enhanced by means of a robotic workstation. When the production batch is big enough, we will see a costs save after a short time, mainly in labor costs. This means the return of investments will be in short time period. In the LAC company there are three types of products made. At laboratory furnaces the efficiency can be enhance by using fixtures. At other standard and atypical furnaces is very difficult to design fixtures or positioners because of their different sizes. Big complication can be also a company location on second floor. The most suitable product regarding to welding efficiency enhancement is big batch production of heaters. For this type the welding time can be shortened by means of a robotic workstation.
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Vizualizace procesu tavného svařování
Kraus, Jan
The presented work deals with a rating of the welding process from the view of welding possibility based on a nondestructive testing record by an acoustic emission passive method (AE). The measuring are carried out on guaranteed welding materials and difficult welding materials. The material (metal-graphic and frakt-graphic) and mechanic verification of a weld creation is placed after the welding process and the reaction of the metals with a different chemical composition. There is also the analysis of the AE records depending on the material states during a formation of a fusible and resistance joint.
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