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Production of pinion
Vališ, Ondřej ; Štroner, Marek (referee) ; Císařová, Michaela (advisor)
The bachelor thesis deals with literature study of cold forming technology. Further the thesis submits a proposal of the production technology of pinion into the gearbox of passenger vehicles made from alloy steel according to ČSN 16 326. Thanks to knowledges aquired by literary study of bulk forming issue was suggested a direct extrusion technology with consequential cold upsetting. The component part will be produced in two production processes and series of fifty thousand pieces per year. These manufacturing processes will be used on forming machine called Schuler with nominal force of two thousand tons which is part of Metaldyne Oslavany company involved in automative industry.
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Vliv příměsových prvků a textury na plastickou deformaci protlačovaných hořčíkových slitin
Horváth, Klaudia ; Dobroň, Patrik (advisor) ; Lukáč, Pavel (referee)
This work is focused on the study of the relationship between microstructure, texture and deformation mechanisms in aluminum-free magnesium (Mg) alloys. Extruded alloys containing zirconium, zinc, manganese and neodymium (ZK10, MN11, ZN11) in a form of rectangular profiles were deformed at room temperature. Uniaxial tensile and compression tests were performed in the extrusion (ED), transversal (TD) and normal direction (ND). The concurrent acoustic emission (AE) measurement was used in order to study the collective dislocation dynamic and the nucleation of twins. The deformation texture was studied by X-ray diffraction on samples deformed in compression up to different stress levels. Keywords: Mg alloys, deformation tests, acoustic emission, texture
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Influence of Solid Solution Elements and Precipitate Formation on the Mechanical Behaviour of Magnesium Alloys
Illková, Kseniya ; Chmelík, František (advisor) ; Karlík, Miroslav (referee) ; Landa, Michal (referee)
Title: Influence of Solid Solution Elements and Precipitate Formation on the Mechanical Behaviour of Magnesium Alloys Author: Mgr. Kseniya ILLKOVÁ Department / Institute: Department of Physics of Materials, Faculty of Mathematics and Physics, Charles University in Prague Supervisor of the doctoral thesis: Doc.RNDr.František Chmelík, CSc. Department of Physics of Materials, Faculty of Mathematics and Physics, Charles University in Prague Abstract: Mg-1 wt. % Mn alloys containing about 1 wt.% of calcium (MX10), aluminium (AM11), cerium(ME11), yttrium (MW11), neodymium (MN11) and 8 wt.% of aluminium (AM81) were indirectly extruded with two different speeds. The partially recrystallised microstructures obtained in MX10, AM11, ME11 and MW11 after slow extrusion exhibited bimodal grain size distributions. Only in the case of AM81 and MN11 a fully recrystallised microstructure was found, indicating differences in the grain nucleation rate during recrystallisation. In these alloys, the weakest texture and, correspondingly, the lowest asymmetry in mechanical properties were also observed. The acoustic emission technique was used to reveal dislocation or twin controlled deformation in differently textured fractions of the microstructure during tensile and compression testing. A direct correlation between the acoustic...
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Production of pinion
Vališ, Ondřej ; Štroner, Marek (referee) ; Císařová, Michaela (advisor)
The bachelor thesis deals with literature study of cold forming technology. Further the thesis submits a proposal of the production technology of pinion into the gearbox of passenger vehicles made from alloy steel according to ČSN 16 326. Thanks to knowledges aquired by literary study of bulk forming issue was suggested a direct extrusion technology with consequential cold upsetting. The component part will be produced in two production processes and series of fifty thousand pieces per year. These manufacturing processes will be used on forming machine called Schuler with nominal force of two thousand tons which is part of Metaldyne Oslavany company involved in automative industry.
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Technology of extrusion
Cháma, Jakub ; Řiháček, Jan (referee) ; Podaný, Kamil (advisor)
This bachelor thesis is a literary study dealing with extrusion technology and is aimed to be used as a study material. There are described basic principles of technology, the division of methods, used materials, machines, tools and the area of usage. The main focus of this work is to depict advantages and disadvantages of extrusion technology and its application in practice, which is supported by the example of usage in one of the Czech companies called Vítkovice Cylinders.
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Line for manufacturing parts for car engine volume thermoforming
Smola, Jiří ; Humlíček, Jaroslav (referee) ; Omes, Jiří (advisor)
The aim of this diploma thesis is to design valve production line for combustion engines by volume forming with heat. The production of line will be 2 500 000-10 000 000 pieces per year. In the introduction of this thesis are described production technologies. Next part is about design of production lines and description of each machine for each technology. Then are made the basic calculations for designe for each machine.
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Production of terminal pin by cold forming
Šuranský, David ; Lidmila, Zdeněk (referee) ; Forejt, Milan (advisor)
The thesis presents a manufacturing technology proposition for a terminal pin made of copper according to ČSN 42 3001.1 located in combution engine distributor in a series of 320 000 pcs. Based on a literature study, 3 versions of operation sequence were proposed, 2 of them with concern for lowest number of operations possible and the third, chosen one, was designed so the strain and therefore mechanical properties were equal in whole volume of final part. Forming force and work were calculated, utilizing the Johnson-Cook material model. Overall calculated forming force was 64,5 kN and total work for one part 189 J. Subsequently technical drawings of die and punch for the second operation of forward extrusion of shaft were processed along with workspace assembly drawing for the Šmeral TPM 5 machine, which was chosen for the fabrication. Economic evaluation set the costs for one part manufactured 0,09 Eur and equilibrium point, after which the production generates profit, located at 170 000 pcs produced.
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Buffer box of a wagon
Řezáč, Patrik ; Štroner, Marek (referee) ; Dvořák, Milan (advisor)
The subject of this work is the proposal of a technological process to create a train car bumper using volume thermoforming. The S235JR (11375) steel has been chosen as the main material. The work contains technological calculations, blueprint documentation of the mold, of the tool and a proposal of the set of machines for the production line. The capacity of such production line has been calculated to be 12460 pieces per year. Economical-technological evaluation of the production is also included.
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3D bioprinting of stem cells and analysis of microscopic images
Kandra, Mário ; Svoboda, Ondřej (referee) ; Kolářová, Jana (advisor)
In this diploma thesis we are discussing about using 3D bioprinting in tissue engineering. We are discribing using biomaterials for construction scaffolder and aplication stem cells in 3D bioprinting. Last section of theoretical part deals with very often used techniques of 3D bioprinting and we are focused on extrusion technique. In the practical part we propose a method for print vasculars structures. We realized prototype of print head, her design and 3D printing of individual parts. To mechanical part we create a control system for printing control. At the end we visualize the organization of the cells using program modules.
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Manufacturing of swivel pin
Vávra, Roman ; Šlais, Miroslav (referee) ; Řiháček, Jan (advisor)
The thesis deals with the design of a suitable technology for serial production of a pin. The component material is structural steel 11,320 5R. Due to the series production and material savings, the molding technology was chosen to be cold. For production, the CM 4-5 ECO HATEBUR process press was designed with a nominal force of 1 700 kN. Progressive tool and drawing documentation of tools for the final operation were also designed. The tool load was verified by manual calculation, and the finite element method was calculated to heat the formed blank due to molding.
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