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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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Comparison of the welding productivity MAG and FCAW
Kutil, Petr ; Sigmund, Marian (referee) ; Kubíček, Jaroslav (advisor)
This thesis is focused on arc welding with MAG and FCAW methods. The first part contains a brief description of these technologies. Emphasis is laid on the principle of arc welding in active shielding gas and on additional materials, especially on solid and flux-cored tubular wires. The second, experimental part, centres on the comparison of MAG (135) and FCAW (136 and 138) methods in terms of the productivity, costs and, last but not least, the quality of fillet welds made in PF welding position. Based on the calculated and measured figures obtained from the experiment, the most suitable method for the given welding position was chosen.
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The production of the console deburring machines
Hlavinka, Martin ; Daněk, Ladislav (referee) ; Kubíček, Jaroslav (advisor)
This thesis submitted deals with the project of the change of the production of the semi-finished product of the console which is produced by casting from the cast iron ČSN 42 2420. The component forms the frame of the deburring machine with two electric motors with the gearbox. For the suggested production the method MAG of technology welding was chosen. Because of the given technology the new construction of the component was chosen. The welded product consists of eight parts burnt from heavy-walled sheet metals. The suggested material of the construction is steel S235JR and for welding the filler rod Weld G3Si1, diameter 1 mm is chosen. For the determination of the optimal parameters of welding the testing through the slap next to the skin weld (size a5) was made. Simultaneously with the testing the fracture areas and the weld root were examined. The suggested parameters of welding were used during the preparation of WPS. For the assembling of the component the operating schedule of welding is planned.
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Welding Basic Course on 135 Technology
Dolejský, Tomáš ; Opletal, Jan (referee) ; Kubíček, Jaroslav (advisor)
TOMAS DOLEJSKÝ: Welding Basic Course on 135 Technology. The project developed within the framework of the bachelor's study of a branch Engineering technology presents a proposal for a theoretical and a practical parts of the welding basic course with a method 135 in accordance with the curriculum of Czech Welding Society-ANB. The latest norms or up to the present time still valid ones are presented in the project. A theoretical part contains a necessary minimum of requirements for participants of the welding basic course. In the chapter of a welding technology is presented a practical part of this welding process and important principles for a required quality of welded joints according to long-time experience. In a conclusion there is an interpretation of a norm ČSN 05 0705 according to what welding basic courses are realized and a welding process WPS is presented here and a proposal of examining tests for a passing an exam in a welding basic course.
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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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Škoda Roomster welding procedure
Podstavek, Michal ; Daněk, Ladislav (referee) ; Kubíček, Jaroslav (advisor)
Bachelor thesis elaborated in full-time bachelor's degree in B-STI. Mechanical Engineering describes the welding process of Skoda Roomster. The thesis describes the production process of welding a chassis and joining methods used on Skoda Roomster. Single methods of connecting includes the types of tests used by VW standards used in Skoda Auto. On the chosen joint is designed the WPS weld.
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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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Welding of pipes made of CrMo steel
Matějek, Martin ; Sigmund, Marian (referee) ; Kubíček, Jaroslav (advisor)
The aim of this diploma thesis is to compare mechanical properties of welded joints on tubes from 32x2 mm. Tubes are made from 25CrMo4 steel, which is used for production of racing kart chassis. The steel has a tensile strength of Rm = 800 MPa and up to 1200 MPa after refinement. For welding of samples are used technologies MAG and TIG.
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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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