|
|
Loss of strength during welding aluminous alloys AW 6060
Sklenář, Martin ; Vaněk, Mojmír (referee) ; Sigmund, Marian (advisor)
The aim of the bachelor thesis is to qualify the welding procedure according to the standard ČSN EN ISO 15614-2. At the beginning of the work is introduced a company with which was this thesis made. This is followed by an assessment of the issue of aluminum. Furthermore, the mechanical properties of aluminum are discussed. Follows by part about welding specially about aluminium welding. In the practical part the samples were welded and subsequently evaluated, then the design and qualification of the welding process was made. In conclusion, the possibilities and results that have been achieved are summarized.
|
|
| |
|
|
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.
|
|
|
LaserHybrid utilization in welding and brazing
Labaj, Petr ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
LABAJ Petr: LaserHybrid utilization in welding and brazing The thesis deals with the basic knowledge of LaserHybrid welding, which is a combination of laser welding, and arc welding. There is also mentioned the use of shielding gas, which has a major impact on the entire welding process. Other part deals with the practical use of the welding method, it analyses the differences in diverse applications according to an industry sector, a type of used material and especially their advantages and disadvantages. LaserHybrid is a welding technology, which has a huge potential to cause a revolution in the field of welding. Its characteristics such as efficiency, quality and accuracy with which LaserHybrid systems operate are highly required. An example is the shipping industry, where was achieved a cut in production times and substantial positive economic outcome.
|
|
|
Analysis of welding by LASERHYBRID process
Teplý, Jan ; Hála, Michal (referee) ; Kovář, Petr (advisor)
The project is elaborated for the basic analysis of hybrid welding that combines laser welding with other welding methods, especially with the MIG and MAG technologies. Besides the Laserhybrid process the methods, of which this Laserhybrid welding is composed, are also presented here. These methods are compared considering the aspects: firstly their advantages or disadvantages, followed by the welding performance, the economic aspect or the application in mechanical engineering. The welding using the relatively new and so far not much widely used Laserhybrid method is very efficient especially for the weld jointing of various bodywork parts. Respectively, this method is efficient for its smaller molten pool, better gap bridging and also for its economic aspect to reduce production times.
|
|
|
Issues of the LaserHybrid welding method
Znášik, Samuel ; Sigmund, Marian (referee) ; Kubíček, Jaroslav (advisor)
The thesis deals with the issue of using LaserHybrid welding for the energy industry where the combination of laser and arc could facilitate higher quality welds resistant to aggressive environments, corrosion and oxidation. The methods that the hybrid process produce as well as possible replacements for the MIG and MAG methods are explored, as well as the different configurations and their possible impact on the process. The possible use of the technology for hyperbaric welding is also presented. The experimental part is devoted to the welding of refractory martensitic steel used in the power industry for the production of steam turbines. Weld structures at different parameters were investigated and hardnesses were compared.
|
|
|
Approximation of Digital Circuits in Yosys Tool
Plevač, Lukáš ; Vašíček, Zdeněk (referee) ; Mrázek, Vojtěch (advisor)
The goal of this work is introduction of cgploss extension. This extension is extension for combinational logic circuits optimization in Yosys tool. Cartesian genetic programming is introduced in the first part of this work. Cartesian genetic programming is a design and optimization method that can be used for circuit optimization and approximation. This chapter introduces representation of combinational logic circuits for Cartesian genetic programming. The next chapter introduces Yosys tool and possibilities of the Yosys extending. The proposed 'cgploss' extension is introduced in the next chapter. The chapter also provides details about the implementation and the usage. The last chapter tests cgploss extension and compares representation of combinational logic circuits.
|
|
|
Využití tavného svařování obalenou i netavící se elektrodou
Kameník, Tomáš
Bachelor thesis covered with unbreakable connection of metals using fussion arc welding and laser welding of iron alloys and other alloys. Here is made an analysis of welding methods MIG, MAG, TIG, coated electrode, laser welding and plasma wel-ding. The substances of these best known methods are described with their deployments in mechanical industries. In the last part of thesis is paid attention to addition products and their actions on the microstructure of weld. Illustrative pictures and metallographic cut complete this thesis.
|
|
|
Inspection of welded joints of loading ramps
Ertl, Roman ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
This master's thesis is focused on problem of welding of loading ramps and inspection of their welded joints. The aim of this thesis is to inspect the welds of loading ramps with regarding to the appearance of defects. The literature review of the research issues of the MIG welding technology and welding of aluminium and its alloys is described in this thesis. There is also described destructive and non-destructive inspection of welds that can be applied to inspection of loading ramps. Theoretical description is followed by an experimental part of the thesis. Experimental part is focused on the three destructive tests (the tensile, the macroscopic and the hardness test) of samples of loading ramps, which are made of EN AW-6005A T6.
|
|
|
Loss of strength during welding aluminous alloys AW 6060
Sklenář, Martin ; Vaněk, Mojmír (referee) ; Sigmund, Marian (advisor)
The aim of the bachelor thesis is to qualify the welding procedure according to the standard ČSN EN ISO 15614-2. At the beginning of the work is introduced a company with which was this thesis made. This is followed by an assessment of the issue of aluminum. Furthermore, the mechanical properties of aluminum are discussed. Follows by part about welding specially about aluminium welding. In the practical part the samples were welded and subsequently evaluated, then the design and qualification of the welding process was made. In conclusion, the possibilities and results that have been achieved are summarized.
|
guest ::
