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Measurement of the length and volume stiffness of steel bellows
Valík, Michal ; Roupec, Jakub (referee) ; Mazůrek, Ivan (advisor)
This bachelor’s thesis deals with the experimental measurement of the length and volumetric stiffness of steel bellows. The first part is dedicated to the analysis of the utilisation of metal bellows connected to the mentioned theme. This part also deals with the actual knowledge of metal bellow’s stiffness characteristics. The second part contains descriptions of selected methods of the measurement process. The last part of this work focuses on the evaluation and analysis of measured data in order to gain the results of the length and volumetric stiffness of metal bellows.
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Adjustable portal for hydraulic pulsator Inova
Buchta, Tomáš ; Robenek, Dětřich (referee) ; Mazůrek, Ivan (advisor)
The aim of this thesis is the innovation of the testing device which is located in Institute of Machine and Industrial Design laboratory. The innovation relates to the portal construction design, where will be placed the hydraulic pulsator from the company INOVA Praha Ltd. New portal construction will be designed with respect to specified parameters and requirements and also with regard to the performed tests (damper tests, vibroizolated properties magnetorheological valves tests etc.). The thesis contains detailed analysis of the current tester and detailed analysis of similar machines with focusing on the portal structure and ways of positioning the crossmember. Further parts of the thesis is a detailed description of the design solution, including the computational simulations, attached drawing documentation and experimentally verified functional sample (crossmember).
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Identification of fatigue damage Al alloy treated with SLM technology using acoustic emission method
Zemanová, Lucie ; Mazůrek, Ivan (referee) ; Mazal, Pavel (advisor)
The aim of the diploma thesis is to study fatigue properties of EN AW-2618A aluminium alloy produced by selective laser melting (SLM). S-N diagrams of reference alloy and SLM material depending on manufacturing conditions were constructed. Reference alloy had the same chemical composition as the SLM material, but it was made by traditional technology (by extruding). While testing, acoustic emission (AE) and resonant frequency of loading was monitored. Fractographic analyses of fracture surfaces were performed. It was found, that SLM material has significantly worse fatigue performance. Fatigue properties are strongly dependent on SLM process parameters settings and precise observance of procedure. The most significant differences in cyclic degradation were found in the length of the stages of fatigue. The more homogeneous the material is, the longer the nucleation stage compared to the total lifetime is. The main source of AE in case of the reference material is plastic deformation on the tip of the crack. For SLM testing, stronger acoustic activity was recorded, because brittle fracture of the material between discontinuities, which is stronger AE source, is more frequent.
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Axle Assessment Using the EUSAMA Methodology
Novák, Petr ; Gajdoš, Petr (referee) ; Mazůrek, Ivan (advisor)
Bachelor thesis deals with problems about areas of a non-assembling diagnostics according to an EUSAMA methodology. Result of the methodology is a technical condition examination of dampers. However with regard to testing of whole suspension and damping vehicle system are results distorted by influence of other vehicle components. EUSAMA needed improvements because of new super light city vehicles and vehicles with runflat tires. Goal of thesis is addition criterion for the EUSAMA which can be used in current EUSAMA suspension testers. Problems are solved by a virtual simulation where is created a model of real vehicle FIAT 500.
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Small hydraulic press for bio-briquet
Kadlec, Martin ; Mazůrek, Ivan (referee) ; Prokeš, František (advisor)
The aim of this master´s thesis was the design of a small hydraulic press for bio-briquettes according to predetermined parameters. The theoretical part presents the current situation in terms of biomass processing, briquette production and a description of briquetting presses. The practical part deals with solutions and detailed structural design of the selected alternatives. Models and drawings were created in the SolidWorks 2011.
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Realization of Educational Problem on Experimental Apparatus for Measurement of Gear Efficiency
Runštuk, Jiří ; Mazůrek, Ivan (referee) ; Klapka, Milan (advisor)
This diploma thesis is focused on the implementation of the educational role of the experimental station for measuring the effectiveness of gears. The proposed laboratory task "Experimental measurement of the effectiveness of gears" is intended to familiarize students with the basic principles of gears and especially highlight the issue of the effectiveness of gears. In this presented thesis, it is also suggested the possibility of expanding the educational use of the experimental station. This extension deals with vibration diagnostics of frequencies of gears.
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Off-road four-wheel motorcycle for seniors
Mihálik, Boris ; Mazůrek, Ivan (referee) ; Brandejs, Jan (advisor)
This diploma thesis deals with the design and realization of function pattern of off-road four-wheel vehicle for seniors. First part of the work consist of research of current commercial vehicles for the elderly, as well as small four-wheeled off-road vehicles and their individual design elements. In this part of the work were also dismantled the proposed legislation allowing legal movement of vehicles on public roads and seniors ergonomics. Another section dealt with the proposal of possible variants for solving the essential structural elements of the vehicle. The last major parts of the work deals with detail description of each selected construction elements of the vehicle. Functional pattern has been manufactured and tested. At the end of this work were published the results of testing of the vehicle and also were proposed possible changes of design.
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Reconstruktion of road simulator.
Stodolák, Michal ; Roupec, Jakub (referee) ; Mazůrek, Ivan (advisor)
This bachelor’s thesis is dealing with reconstruction of drum road simulator, which is placed in laboratory of The Institute of Machine and Industrial Design. The first part is attended to basic dividing of road simulator. The second part contains description and analysis of the current machine. In the next part is an analysis of chosen variation and their construction. The last part of thesis is attended to the lightening of the load wheel in period, when the test doesn’t run.
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Magnetorheological damper for Formula Student
Dlápal, Václav ; Strecker, Zbyněk (referee) ; Mazůrek, Ivan (advisor)
The master thesis deals with design, manufacturing and testing of a prototype magnetorheological damper developed for Formula Student vehicle. The aim was to design and test the damper with similar damping properties to the vehicle as a conventional damper has. Target force-velocity curves were set using quarter car model and evaluated comparing minimal contact force of a tyre for conventional and newly developed damper characteristics. Structural analysis of designed parts, hydraulic and static magnetic analysis were performed. Manufacturing of a specific part magnetorheological damper part was described – piston. Manufactured prototype damper characteristics were evaluated.
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