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Forgings in the engineering drawing
Krulich, Hynek ; Nohál, Libor (referee) ; Svoboda, Petr (advisor)
This Bachelor’s thesis deals with an overview study of technical documentation of forgings. It includes history, characteristics, basic division and machines used in forging. Next part focuses on their creation by the die method. Final part is discussion which summarises an examlpe of these method.
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Description of machine tool spindles
Nohál, Libor ; Opl, Miroslav (referee) ; Blecha, Petr (advisor)
The subject of this thesis, called Description of Machine Tool Spindles, is research and description of spindles used as parts of machine tools. The first part is devoted to the factors influencing the construction of the spindle and to the general division of spindle types according to their construction. The second part lists specific examples of spindles made by selected manufacturers along with a detailed descriptions of the individual spindles.
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Engineering design of the mobile acoustic shielding
Rakhmatullin, Artem ; Nohál, Libor (referee) ; Klapka, Milan (advisor)
This bachelor thesis deals with the problem of improving the environment for measurement using variable elements with acoustic insulation. The aim was to design several variants of acoustic shields and choose the best according to the specific requirements described in the work. We have calculated a specific theoretical estimate of attenuation from values reported from different manufacturers. The designed structure can be used to shield unwanted sources of ambient noise.
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Correlation of AE Signal Changes to Rolling Contact Damage Propagation
Nohál, Libor ; Čermák, Jan (referee) ; Hájek, Karel (referee) ; Hutař, Pavel (referee) ; Mazal, Pavel (advisor)
This PhD thesis deals with the experimental study of more precise rolling contact fatigue damage detection using acoustic emission method. A series of experiments was carried out on two representatives bearing steels and the analysis of sensitivity for the presence of contact damage was performed on selected parameters of acoustic emission. The extent of damage was classified into four classes and signal parameters the most characterizing the development of damage were correlated with the extent of damage. It was also verified the influence of lubricants on acoustic emission signals. The results have an impact on the implementation of more precise rolling contact fatigue tests and evaluation of parameters of acoustic emission signal. On the basis of experiments was established methodology for more precise RCF testing method using acoustic emission on test-rig AXMAT II.
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Condition-based Lubrication System
Kroliczek, Václav ; Nohál, Libor (referee) ; Svoboda, Petr (advisor)
This work provides a review of actual information about condition-based lubrication systems for roller bearings to make longer their durability. The first part describes current types of bearings, their lubrication and adequate lubricants. The second part deals with condition-based lubrication systems.
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Design of Welding and Testing Tools for Pressure Vessels
Kvapil, Radek ; Nohál, Libor (referee) ; Brandejs, Jan (advisor)
Bachelor’s thesis is focused on design of welding and testing jigs for pressure vessels. The aim of this project is to create simple design. The design must ensure easy installation in case some of the correction of the report. Thesis includes design examples for other types of vessels, structural design solutions for the specified vessels, drawings, procedure of welding and testing in these jigs.
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Design of steel foot guideway for vulcanizing press
Žáček, Jan ; Nohál, Libor (referee) ; Svoboda, Petr (advisor)
Bachelor‘s thesis is focused in design of guideway construction for automatic transfer of steel foot into the station of vulcanizing press. The theoretical part describes historical milestones of making footwear, including machinery, with a focus on vulcanization proces. The design part contains different alternative solutions which meet the conditions specified by the manufacturer of this shoemaking machine for which is the guideway designed. Subsequently is chosen the most appropriate solution that consists of a system of pulleys, toothed belt and line formed by ball transfer units.
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Realization of the plastic holder of the car navigation
Pavlík, Ondřej ; Nohál, Libor (referee) ; Paloušek, David (advisor)
The goal of this bachelor´s thesis is suggestion and manufacture of the plastic holder of the car navigation. The literature retrieval part contains gathering of information about external holders of the car navigations and description of prototype manufacturing method. The construction part is an accompanying report of suggestion and manufacturing of the car holder. 3D CAD Model is created in parametric modeller via Autodesk Inventor Professional 2010. The holder is then made via Rapid Prototyping FDM technology.
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Engineering design of the mobile acoustic shielding
Rakhmatullin, Artem ; Nohál, Libor (referee) ; Klapka, Milan (advisor)
This bachelor thesis deals with the problem of improving the environment for measurement using variable elements with acoustic insulation. The aim was to design several variants of acoustic shields and choose the best according to the specific requirements described in the work. We have calculated a specific theoretical estimate of attenuation from values reported from different manufacturers. The designed structure can be used to shield unwanted sources of ambient noise.
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