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Optimalization of Temperature for Semi-hot Forming of Roll Bearings
Hrouzková, Andrea ; Klakurková, Lenka (referee) ; Doležal, Pavel (advisor)
This bachelor's thesis solve the problems about optimalization of temperature for semi-hot forming of roll bearings steels. The purpose of this thesis is finding the optimal interval of temperatures, in which 100CrMnSi6-4 bearing steel shows good strain and deformation characteristics after forming. Methods for data evaluation of mechanical properties are the tensile and upsetting tests which were performed on higher temperatures. It was microscoped microstructure changes of the bearing steel 100CrMnSi6-4 during temperature influence and classification with the light microscope.
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Mounting frame structures of production and warehouse complex in Paskov
Gaďurek, Robin ; Nečasová, Barbora (referee) ; Vlčková, Jitka Laura (advisor)
The content of the submitted thesis is the implementation of a reinforced concrete skeleton assembled in Paskov. This is a manufacturing and warehouse facility Italinox. The work contains a comprehensive technical report, technical report transport relations, bills of quantities, two technological regulations, two control and test plans, design of mechanical assemblies, and health and safety. The appendix contains drawings framed construction and piloting, budget, schedule, drawing of the site.
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Kontrola technického stavu mechanizačních prostředků pomocí termokamery
HALÍŘ, Vladimír
Main topic of this research is possibility of use the infra-red radiation of materials for purpose of machine diagnosis in agricultur machinery. Non-contact method of temperature monitoring is possible with special camera called infravision camera. With this device is possible to scan surface temperature of monitored object. Output of this scan is called thermogram. For users are values of scan then shown in false colors that are corresponding with a surface temperature of an object. In agricultur machinery the use is where the prerequisite for high increasing friction is converted into heat. Abnormal increase in the operating temperature can then be attributed to different severity of value and used as an indicator of the degree of wear for a possible future state of failures. The result of this research is a summary description of the factors that influence its impact on technical parameters of machine parts. The principles for the proper capture of thermal images, so-called thermograms, and procedures appropriate for their evaluation are described to. Theoretical assumptions are practically tested for the use at normal operating diagnostics of machines and their components.
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Modal and spectral properties of the rotor on permanent magnet bearings
Kozánek, Jan ; Scopel, D. ; Svoboda, R. ; Šafr, M.
In this article the spectral and modal properties of the rotor on contactless bearings are investigated. The dynamic behaviour, especially the eigenfrequencies and corresponding modes have been calculated in two different ways, by the FEM ANSYS software in the Institute of Thermomechanics and by the program DYNROT in TECHLAB company. The importance of this analysis is supported by the fact that the first non-rigid body resonance is not far from the working rotation speed 40 000 rpm .
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