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Surface treatment of roll bearings
Kubelka, Milan ; Klakurková, Lenka (referee) ; Švejcar, Jiří (advisor)
The bearings are one of the most widely used construction components enabling mutual movement of parts and at the same time transmission of interacting load. The basic requirements placed on components of roll bearings are particulary increase of contact fatigue resistance, decrease of the friction coefficient between the rolling bodies and bearing rings, increase of hardness and abrasion resistance of functional surfaces, the wear resistance, corrosion protection and finally the electrical and optical properties too. As production of bearings from materials with these attributes would be quite expensive, surface modifications are used for improving the mechanical properties. The main task of this bachelor thesis is description and evaluation of technologies suitable for surface treatment of roll bearings with increased attention to those types of surface treatment which, in cooperation with SVÚM will be studied in more detail in the experimental part of this work (especially polymer coatings, phosphate films and DLC - type coatings). The wear evaluation of different types of coatings was performed with the aid of scanning electron microscopy after the tribological testing.
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Piston Rings of Modern Petrol Engines
Cupák, Václav ; Maršálek, Ondřej (referee) ; Raffai, Peter (advisor)
This bachelor thesis deals with issues of piston rings used in modern petrol engines. The first part is focused on describing of functions and requirements with which piston rings must deal with. Next part is aimed on shapes of piston rings. Materials from which are piston rings made of are part of third chapter. For proper function, it is important to make some surface treatment. The last chapter contains surface treatment of piston rings.
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Passport and reconstruction of the water treatment plant of the Kateřinice village
Vaníček, Petr ; Zubíček,, Vojtěch (referee) ; Ručka, Jan (advisor)
The aim of the thesis is Kateřinice water treatment plant technical condition assessment and ascertained malfunctions elimination project. The documentation is enclosed. Essential part of the thesis is concerned with calculations and variant solutions of the object reconstruction and water treatment technology. Technical drawings of the water treatment plant are included. All the data was processed in accordance with valid laws and standards. The water treatment plant will be restored to its functional state on the grounds of the designed solution.Therefore permanent high quality of drinking water will be guaranteed for the inhabitants of Kateřinice.
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Surface treatment of metals
Hamal, Jan ; Kubíček, Jaroslav (referee) ; Žák, Ladislav (advisor)
This master thesis describes design of suitable surface treatment technology to get component resistant to corrosion of conventional atmosphere. Given component has a shape of pin and is made of construction steel. At the beginning, there is a theoretical study of galvanic zinc coating and galvanic surface treatment in general. Then there is analysis of damaged galvanic zinc surface and its impact of corrosive resistance of that layer with collaboration with company KOZÁK SVITAVY. Corrosive resistance of damaged zinc layer is then compared with corrosive resistance of quality zinc layer. At the end of this thesis is technical and economic evaluation.
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Reduction of Valvetrain Mechanical Losses
Kučera, Pavel ; Píštěk, Václav (referee) ; Novotný, Pavel (advisor)
The topic of this thesis is the mechanical losses in the valvetrain. The purpose is to describe the creation of individual losses and their possible reduction. The main factor of creation of losses is friction. The result of this thesis is to highlight the possible methods to reduce friction and other influences acting on the valvetrain. The main benefit is description various types of surface and design modifications of valvetrains, which are already used or are in development.
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Replacing of metal sheets with laminates
Ulrich, Josef ; Němec, Karel (referee) ; Molliková, Eva (advisor)
The aim of the bachelor´s thesis is composite material, specifically fiberglass. In the first part of this thesis fiberglass is described, their composition, chosen production technology and possibility of use. Mechanical properties and its advantages of fibreglass are compared with metal sheets. Fibreglass is described on example of particular component.
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