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Design of clamping device for mass production on CNC milling machine
Blahuta, Jiří ; Foltýn, Jan (referee) ; Svoboda, Petr (advisor)
This bachelor thesis deals with a design of a milling fixture and a fixture for broaching on a press. The fixtures enable progressive production on a CNC machine with a high efficiency and minimal downtime. The fixtures are designed for a serial production of a specific component in automotive industry with quantity of 250 000 units per year. The main goal and partial goals of the thesis were accomplished. The designed milling fixture uses wedge clamps and hydraulic cylinders for clamping. The broaching fixture uses springs to position the workpiece. The design of proposed fixtures was verified by production capacity calculations, which prove that the series will be produced in a required time. To further increase productivity, it was suggested based on calculations to use five milling fixtures in the milling machine. The design of the broaching fixture was verified by FEM simulation, which showed that the device is sufficiently rigid and strong. The result of the work is a design of two fixtures in the form of 3D models and drawings. The work includes, among other things, research of three-axis CNC milling machines, broaching machines, and wrought aluminium alloys.
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Film thickness distribution during the start-up of smooth surfaces.
Manga, Martin ; Křupka, Ivan (referee) ; Svoboda, Petr (advisor)
Bachelor thesis is engaged in experimental study of start-up of smooth surfaces under the conditions of mixed and elastohydrodynamic lubrication. Start-up is non-stationary process, whereat the surface doesn’t need to completely separated with lubrication film. Therefore it exists a real risk of failure. Study summaries all present studies and extends with own experiment on the equipment of tribological laboratory. The evaluation of the experiment was made by chromatic interferometry. This method is used to measure thin lubrication films. Experiment for miscellaneous values of acceleration confirms the findings of previously studies.
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Design of surface texturing experimental rig
Bouma, Adam ; Svoboda, Petr (referee) ; Šamánek, Otakar (advisor)
The aim of this thesis is mechanical indenter design, mainly two basic parts of this apparatus. The introductory section describes the basic techniques of mechanical surface texturing of engineering surfaces. The second part deals with the particular design of the device. It also describes the strength control of loaded components. The economic evaluation is given at the end.
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Steel Production Hall
Svoboda, Petr ; Pilgr, Milan (referee) ; Karmazínová, Marcela (advisor)
The aim of the bachelor thesis is the design and assessment of a steel two-bay hall for industrial production in Znojmo. The hall has a rectangular plan with a width of 36 m (18 m and 18 m) and a length of 75 m. The total height of the supporting structure is 10.6 m. The hall houses a bridge crane with a capacity of 5 t. The supporting structure consists of trusses, full-wall columns, stiffeners and full-wall trusses.
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Overview of new trends in the construction of short arms.
Fišer, Petr ; Hort, Filip (referee) ; Svoboda, Petr (advisor)
The objective of bachelor´s work is survey type of construction short arms namely pistol and revolvers. The first chapter bachelor´s work includes analysis of the main and others parts, this patrs are located pistols and revolvers. In the following chapter is historical evolution with dividing according to primary objective type of construction and description of several fulfilment revolver and revolvers. The last chapter evaluate contemporary and future tendency of development in constructions short arms.
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Overview of rapid prototyping technology for medicine
Jícha, Martin ; Svoboda, Petr (referee) ; Paloušek, David (advisor)
This bachelor thesis is intended to map the current state of technology and the possibility of rapid prototyping in medical use. The first part is focused on the common principle of function of RP technologies. The following section discusses specific technologies essential RP and the level of current applications for medical purposes, including specific examples. Here is an outline of future development of these technologies.
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Sealing Diaphragm Walls
Kaderka, Jan ; Boštík, Jiří (referee) ; Svoboda, Petr (advisor)
The topic of this thesis is history, the purpose to carry out diaphragm wall, types of the emplyoed technologies and specific examples of its application in practise. Part of this thesis will concantrate on the parametres of bonding agents and the grouting mixtures.
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Locomotive power transmission
Svoboda, Petr ; Knotek, Jiří (referee) ; Zubík, Martin (advisor)
The work describes the specific conditions for transmission devices in railway operations. It includes the description, distinction and comparison of power-transfering possibilities from the rail vehicle's combustion engine to the propelled chassis.
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Study of starvation in a grease-lubricated elastohydrodynamic contact
Kuňák, Jiří ; Hartl, Martin (referee) ; Svoboda, Petr (advisor)
This diploma thesis is an experimental study of grease lubrication in a starved elastohydrodynamic lubricated (EHL) contact. Lubricating film thickness is measured with tribological experimental device ball-on-disc using optical interferometry and high speed camera. The experiment is aimed at a comparison of results acquired by ball-on-disc device and full scale axial bearing. In addition, this paper also investigates the influence of number of the rolling elements (overrolling time) on the resulting film thickness.
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