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Welding of stainless steel in sewage treatment plant
Zána, Jiří ; Daněk, Ladislav (referee) ; Kubíček, Jaroslav (advisor)
This bachelor thesis is dealing with stainless steel welding, especially for waste water treatment plants use. The thesis presents two most suitable stainless steel materials that eliminate fundamental disadvantages of other steel types. In the experiment three types of welding are tested for both materials and each weld is performed using two amperages. The weld bead and root WPS surface is evaluated for particular samples. For others the weld macrostructure is assessed.
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Influence of welding direction on depth of penetration for MAG method
Šmak, Radim ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
This bachelor thesis deals about Influence of welding direction on depth of penetration in S 235 JR steel for MAG welding. First theoretical part of the thesis was devoted to a description and technology of the chosen method. In the second practical patr of the thesis was designed optimal welding parameters and conditions of welding. Based on them was performed an experiment. From the experiment was detected the depth penetration, heat affected zone and structure of the metal.
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Working chamber of electron beam welder
Červinka, Petr ; Mrňa, Libor (referee) ; Daněk, Ladislav (advisor)
The submitted work deals with the design of the working chamber of the electron beam welders. This vacuum chamber of the cubic shape, with a volume of approx. 100 litres will be used in the ÚPT of the AV ČR v.v.i. during building an experimental welding with electron gun performance 2 kW with accelerating voltage 60 kV. The theoretical part is about the theory of electron welding, electron beam welders of basic sections of the facility, and about possibilities of the technology for welding working chambers. In the practical part of the thesis is being thought out the design of the working chamber (construction chamber in design software), the strength test of construction chamber in the software ANSYS and the design of appropriate methods of welding. The sample of the material which is the stainless steel 17240, from which the chamber will be made, have been used in methods of welding TIG and MAG that was verified by the suitability of the chosen methods of welding.
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Comparison of GMAW and Plasma Welding
Nejedlý, Tomáš ; Mrňa, Libor (referee) ; Daněk, Ladislav (advisor)
Developed thesis compares MAG welding and plasma welding, with the same input parameters. Based on the literature was reviewed weldability and welding of both methods. It was experimentally for both technologies specifically designed heat input, evaluation and macrostructure of the weld dilution, the dimensions of the heat affected zone and finally test the hardness in the transverse direction Vickers.
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Design of welding jig
Štancl, Jiří ; Kubíček, Jaroslav (referee) ; Daněk, Ladislav (advisor)
The main focus of the thesis is the proposal for the construction of welding jig for the extension of the bus. Welding of individual parts of the assembly is on manual workplace. All parts are made of fabricated structural steel ČSN 41 1373 with galvannealed coating. As an appropriate technology for welding of extension with the optimal parameters method MAG was chosen.
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Certification of company according to ČSN EN 15085 and ČSN EN ISO 3834
Kazdera, Tomáš ; Daněk, Ladislav (referee) ; Kubíček, Jaroslav (advisor)
The project elaborated in frame of engineering studies is focused on the certification of the company SW-MOTECH sro in the welding of steel structures for rail vehicles. According to standards ČSN EN 15085 and ČSN EN ISO 3834. The first part focuses on theoretical introduction to the used welding methods. The second section describes the destructive and non-destructive tests on individual welding methods, including their evaluation. Based on work tests pWPS is exposed to welding procedure WPS
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Laser welding of the abrasive steel
Sklenář, Zdeněk ; Daněk, Ladislav (referee) ; Mrňa, Libor (advisor)
The project, prepared by the engineering study compares the welding abrasive steel HARDOX 400, fiber laser welding method, which will be compared with a MAG welding method and using different protective gases (argon and helium). In the theoretical part, i worked both welding technology's and the issue of high-strength steel. In the experimental part were performed and evaluated by destructive mechanical testing and bending test, the transverse tension test, test macrostructure and microstructure of welds. In conclusion the thesis deduced the final results of the experiment.
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Economy comparison of welding technology MAG and ESAB-SAT
Lžičař, David ; Martinec, Jiří (referee) ; Kubíček, Jaroslav (advisor)
This project, elaborated in terms of Master’s studies in domain 2303T005 presents an analysis comparing conventional method of welding MAG and welding technology ESAB SAT^TM. ESAB SAT^TM is the new innovative method based on the principle of welding by the method MAG. The experimental part of the project is aimed to assessing the quality of welded joints, produced by ESAB SAT^TM, which part is performing selected destructive tests. Afterwards economic analysis by comparative method evaluates the measured and calculated parameters of welding.
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Design of flat pallet for automatic parking garage
Osmík, Jiří ; Mrňa, Libor (referee) ; Kubíček, Jaroslav (advisor)
Design of flat pallet for automatic parking garage. Parking and description of automatic parking systems. Welding and weldability of materials. Electric arc welding and welding by melting electrode in protective gas by MIG/MAG method, welding instruments. Design of parking palette calculation and calculation this palette by MKP method. Process of drawing documentation for parking palette. Design of welding process and WPS. Description of annealing and zinc coating. Economic-technical analysis of palette for automatic parking system production.
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