Browsing by Author "Stuchlík, František"

Now showing 1 - 20 of 21
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    Analýza bloků válců z hliníkových slitin se zalitými vložkami
    (Technická Univerzita v Liberci, 2007-01-01) Borovkova, Yevheniya; Stuchlík, František
    This thesis focuses on embedding of iron liners into the aluminium-alloy cylinder blocks. Theoretical part includes cylinder blocks and iron liners production overview, diffusion process and heat transmission through a transient layer description. Experimental part contains description, pictures and evaluation of retrieved cylinder blocks samples, their chemical analysis and mechanical characteristics evaluation. Performed non-destructive testings (x-ray and ultrasonic detection) are also described.
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    Analýza příčin poruchy hřídele hydraulického servořízení
    (Technická Univerzita v Liberci, 2008-01-01) Pauer, Jaroslav; Stuchlík, František
    This bachelor´s thesis deal with analysis of damage causes of hydraulic power steering shaft. First part describes the device and the used material. The other part clarifies the principle of the material fatigue which causes defects, and also the division of the diffraction. In experimental part analysis of fracture area are made, mechanical properties of used material are attested and metalografic tests are rated with the aim to find the causation of diffreaction origin. Final part values results of experiments and the adviced technique for the next production.
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    Analýza vlivu chemicko-tepelného zpracování konstrukčních ocelí na tribologické vlastnosti povrchů
    (Technická Univerzita v Liberci, 2008-01-01) Gamrot, Agnieszka; Stuchlík, František
    The master's thesis deals with the influence of thermo-chemical treatment of constructional steel on tribological properties of the surface. In the theoretical part thermal-chemical treatments used are described as well as methods and test equipment for friction and wear testing are specified. The practical part contains a series of basic examinations carried out on samples that were carbonitriding and sulfonitriding. These tests specified the properties of created surface layers. In the next part the discussion about obtained results is carried out.
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    Hodnocení procesu chemicko tepelného zpracování vybraných dílů převodovky MQ 200
    (Technická Univerzita v Liberci, 2009-01-01) Bouček, Filip; Stuchlík, František
    The aim of the BSC work is to evaluate the process of the thermo-chemical processing of carbonitrided core of the synchronous coupling and the cemented disc wheel and to compare the results of metallographical analysis and measurement of surface hardness with directives of technical process.
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    Materiálové vyhodnocení svarové čočky vysokopevnostních plechů
    (Technická Univerzita v Liberci, 2010-01-01) Suchý, Michal; Stuchlík, František
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    Metalografické hodnocení struktury odlitků litých pod tlakem
    (Technická Univerzita v Liberci, 2009-01-01) Čičo, Jozef; Stuchlík, František
    The study is focused on characterization of material properties of a cast of an engine made of AlSi9Cu3 alloy. Samples were taken from two different parts of the cast. The impact of pressure and speed of solidification on the quality of the cast and and its inner structure was examined by several tests of the material.
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    Možnosti náhrady Mo v nízkolegovaných litinách
    (Technická Univerzita v Liberci, 2006-01-01) Kyzivát, Marek; Stuchlík, František
    The aim of the baccalaureate work is to get acquainted with the production of plumbaginous irons in Škoda Auto Inc. in cases of alloying element use. One of the most important alloying element is molybdenum which is used in casts of brake wheels. Molybdenum ensures good tensile properties but its disadvantage is the fact that it is too expensive. The baccalaureate work should verify the brake wheel casts regarding the material aspect and analyse possibilities of Molybdenum replacement. Furthermore the work will recommend another procedure for brake wheel production and make a technical economic analysis of the recommended procedure.
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    Ověření povlaků snižujících opotřebení třecích dvojic
    (Technická Univerzita v Liberci, 2006-01-01) Bartoníček, Petr; Stuchlík, František
    The submitted bachelor´s thesis examines thin diamond layers applied in order to reduce wear and passive resistance of friction pairs. It deals with nanolayers, plasmatically produced by the PACVD method. The basic material used for coating was steel according to ČSN 41 5260.
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    Ovlivnění vlastností materiálu pro výrobu kolejových vozidel svařovacím procesem
    (Technická Univerzita v Liberci, 2009-01-01) Plch, Vítězslav; Stuchlík, František
    The submitted thesis investigates the dependence of structure changes and mechanical properties of steel S500MC from thin plates on thermal action while the welding process. It includes the results of tensile test, metallographic analysis and hardness measuring.
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    Posouzení kvality povlakovaných vrstev
    (Technická Univerzita v Liberci, 2010-01-01) Kostečka, Petr; Stuchlík, František
    This work deals with coating of cutting tools. At the beginning it explains why the tools are coating. In the next part there is an overview of methods using for coating including short explanation of principles of individual technologies PVD and CVD. An overview of test methods for evaluation of quality of coatings is at the end of the theoretical part. The approach to coating tools in firm BOSCH Diesel Jihlava Ltd. is analysed in the practical part. Next there is a proposal for evaluation quality of coatings in case when the firm is not producer of coatings. The final part describes how the proposed procedure was carried out in practise.
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    Příspěvek k problematice výroby odlitku z Al slitin litých pod tlakem
    (Technická Univerzita v Liberci, 1980-01-01) Stuchlík, František
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    Studie materiálových vlastností ocele 42CrMoS4 vstupujících do procesu objemového tváření za tepla
    (Technická Univerzita v Liberci, 2007-01-01) Zvěřinová, Jana; Stuchlík, František
    This work is viewed to a determination of properties of R 038 105 101 AB cranked shaft made from 42CrMoS4 steel which are entering to the thermoforming process and optimize this process. The work is trying to clarificate this problem by using results of material tests and practical observation.
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    Studium problematiky zalitých vložek bloku válců motoru Škoda 1.2 HTP
    (Technická Univerzita v Liberci, 2008-01-01) Jícha, Petr; Stuchlík, František
    Bachelor's thesis examines surface modifications of cylinder's fill and influence of these modifications to cohesion between cylinder's fill and engine block. Methods such as chemical coppering, phosphorateing, degreaseing and machining were used for modifications of cylinder's fill outer surface. Serial cylinder's were used like reference representative.
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    Technická analýza možné náhrady karbonitridace procesem sulfonitridace s cílem snížení pasivních odporů a zvýšení životnosti
    (Technická Univerzita v Liberci, 2008-01-01) Szkudlarek, Marcin; Stuchlík, František
    In the thesis the modification of surface through thermal-chemical treatment on final elements of MQ 200 gear box to carry out the analysis of possibility to replace the carbonitriding with sulfonitriding process is undertaken. In the theoretical part the typical processes of thermal-chemical treatments and the wear model arising during machine elements' mating are described. There is also the evaluation of sulfonitriding from technical, economical and ecological point of view brought up. In the experimental part the characteristics of obtained layers by using of following testing techniques: optical microscopy, X-ray microanalysis, microhardness measurements and tribological tests using the Pin-On-Disc method is carried out. The obtained test results are shown in a form of pictures, diagrams and tables.
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    Úprava povrchu diamantovou nanovrstvou u vybrané třecí dvojice motoru Škoda
    (Technická Univerzita v Liberci, 2007-01-01) Sikorski, Daniel; Stuchlík, František
    The submitted diploma work examines thin diamond layers applied in order to reduce passive resistance and increase vitality of friction pairs. The layers are produced by the PACVD metod in field of high frequency (RF) or double frequency (MW/RF) plasma. The Basic material's used for coating was steel (according to norm ČSN 41 2050) and alloy of aluminium (ČSN 42 4339).
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    Vliv očkování na vlastnosti a strukturu litiny s kuličkovým grafitem
    (Technická Univerzita v Liberci, 2007-01-01) Záveská, Andrea; Stuchlík, František
    Aim of this work is to find out structure and mechanical properties of cast-iron with ball graphite adding inoculator and modifier. Theoretical part is in general about cast-iron, their division and properties. Describe cast-iron structure with ball graphite.
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    Vliv odplynění slitiny AlSi10Mg (EN AC 43000) na její vlastnosti při gravitačním odlévání do kovové formy
    (Technická Univerzita v Liberci, 2007-01-01) Dužda, David; Stuchlík, František
    The topic of this thesis is determination of the influence of degasification on mechanical characteristics of alloy AlSi10Mg at gravity-die casting. The theoretical part deals with general summary of the most commonly used aluminium alloys in foundry industry and with the influence of other ingredients and foreign substances on the characteristics of the alloy and their codes in accordance with the Czech Standard ČSN EN 1706. Further are discussed the issues of gas content in alloys, methods of degasification and cases when gas saturation is carried out. In the practical part measurements of hardness, yield value, ultimate strength and elongation of four representative kinds of smelt were carried out. The thesis includes pictures of microstructure of each smelt sample.
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    Vytvrzování Al slitin u odlitků litých pod tlakem
    (Technická Univerzita v Liberci, 2007-01-01) Rylichová, Vladěna; Stuchlík, František
    Diploma thesis is devoted to age-hardening of aluminum alloy AlSi9Cu3(Fe) die casting. On the basis of measured value - Brinell hardness changes of mechanical properties of the pressure castes are monitored depending at time. In term of mechanical properties are matched values of natural and artificial aging. Diploma thesis is conceived into two main parts. Observations about heat treatment of aluminum alloys are summarized in the theoretic part. The experimental part includes description of effected tests, sales chart of results and metallographic evaluation of material of pressure cast.