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Variable Intake manifold for 16V Engine
Konečný, Lukáš ; Franz, Rudolf (referee) ; Dundálek, Radim (advisor)
Aim of the diploma thesis is to design intake ducting with variable cross-section for 16V diesel engine consisting from divided intake manifold and divided ejector. Cross-section variability is ensured by a swirl flap placed in the divided ejector. Next aim of thesis is to provide drawing documentation for production of samples. For designing was used PTC Creo system and software GeomCaliper. Also was taken account of manufacturing of the parts with sand-casting, especially to guarantee trouble-free taking out of models from the moulds, and taking out of cores from core moulds, and also for machinability of some elements. Introduction of thesis is focused on diesel engine emissions and ways of their reduction.
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Manufacture and defects of heavy castings
Vymazal, Aleš ; Čech, Jan (referee) ; Záděra, Antonín (advisor)
Objective of diploma thesis is to proceed analysis of actual technology in operational terms for concrete casting of bearing . Constructed by foundry of steel ŽĎAS a.s., Žďár nad Sázavou. After designing changes in technological process accomplish detail evaluation of mechanical properties and chemical homogenity of metal at selected parts of sample casting.
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Use of 3D technology in foundry industry
Straka, Pavel ; Krutiš, Vladimír (referee) ; Pernica, Vítězslav (advisor)
The work is focused on replacing a faulty briefcase handle with an aluminium substitution. The handle is fabricated with the help of reverse engineering, where the handle is scanned with a 3D scanner. With that information, a model copy of the part is made, which is 3Dprinted from PLA and PolyCast materials. These handles are used as expendable models, which are used for casting using an “investment casting” method. Those are made from an AlSi10Mg alloy. Theoretical part deals with additive technologies, which are mostly used for manufacturing of foundry models and moulds. Next, the basic principles of 3Dscanning are described, and the term reverse engineering is also explained.
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The Case
Svobodová, Hana ; Šrek Bromová, Veronika (referee) ; Gabriel, Michal (advisor)
I assume huddled topic that I put into my past work as well as in final work. Casting my body, which is covered with feathers and create a cocoon of him, husk without the interior. Sculpture has two sides, the principle of duality, femininity and counterpart. Outer packaging evokes pleasant birdlike body surface and in the inner part aggressively squeeze ends of the wicks feathers.
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Negative
Videmanová, Marie ; Žáková, Radka (referee) ; Gabriel, Michal (advisor)
The inspiration for this sculpture has gradually arisen from the experience of the previous work. I used to be in the sleeping people, in the statues of life-sized human bodies. These sculptures deformed, transformed and manipulated by various manipulations, thus getting them into unrealistic positions. These changes made it possible to see the statues, to look at their dreams. The sculptures then acted as holy scenes from the churches. The normal position of a sleeping man turned into a kind of gesture when turning. With this creation of a series of sleeping people, I cast negative shapes of castings while casting live models. Unfortunately, these negatives are one-off and are destroyed and not treated in the next process. At this time, I began to understand these negatives not only as an intermediate but also as a sculpture output that had the same function and value for me as a classic statue. Like a print, like a dream, depicting reality. This dream allows the audience to enter the figures, into their dreams. In my bachelor thesis I therefore continue to deal with human forms but in their opposite form, and I can say that I am creating a game of forms and playing with them. I did not stay with the classic forms of the bas-relief, so with the classic negative relief, but I embedded my negatives into cubes, which act as a game of cubes, which can be arranged, rotated, tossed. In my bachelor thesis I create a small group of three dice that allow this game. Cubes have only one possibility where two human characters, two human fingerprints of men and women follow. All the other possibilities of arranging the dice with the prints of these two figures are no longer logically unrelated - they follow unreasonably. Just as it is in dreams. In most cases, we have something logical in our dreams, such as characters and / or nature, but then it becomes always unrealistic in the dreams that we start flying. And these dice are like dreams - sometimes real, but mostly chaotic. That's why I gave my work a subtitle: "Negative Dreams" The word "negative" comes from the form of the statue I chose and the "dreams" of my idea, the inspiration I want to see for the viewer. Analyzing dreams, how they work, and how it enters our subconscious mind, I can not do it, I just create my own game inspired by dreaming into dreams. Dreams that seem to these two people in particular and which are diverse. I just built this work on my vision of looking into these dreams and how these dreams work. When the dream seems to me, it has a real background and then goes into something abnormal, unrealistic. Thanks to manipulation with dice I have the ability to change the real in unreal. I play dice with these two prints of people, the prints of their dreams. In my work, it represents the real basis of the dream arrangement of the cubes, in which the imprints of the two characters are anatomically linked. And then the dream comes and the dice regroup. The author or viewer has the ability to swap, change, and dice. Reality will change into a dream. The characters in a dream can be unnaturally linked or not at all. From one particular happening, a number of other, chaotic stories are developing. For the presentation of my bachelor thesis I chose the very "real" position where the characters follow on, they work. The cubes are built in a column to allow them to walk around and look at both figures. I photographed some other possibilities in various variants, lying, turned, shu
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Manufacture of massive castings and their defects
Doležal, Petr ; Martínek, Ludvík (referee) ; Záděra, Antonín (advisor)
Object of this master’s thesis is accomplished analyze the range of foundry of steel ŽĎAS a.s., Zdar nad Sazavou and make the type massive steel castings and analysis of existing technology foundry and metallurgical defect. The beginning of this master’s thesis is dedicated to the manufacturing of steel foundries range ŽĎAS a.s., Zdar nad Sazavou. The following section is devoted to manufacturing technologies for the production of massive steel castings. In the final part of this thesis are described metallurgical and foundry defects of the typical castings of steel foundry and proposals to eliminate these undesirable defects. End thesis includes a summary of the results and trends in the development of research in the production of massive steel casting.
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Investment casting - defects list
Šmatelka, Jakub ; Staňková, Markéta (referee) ; Mikulka, Vít (advisor)
This bachelor thesis deals with defects which can occurred during investment casting process. In the first part, there is briefly described investment casting process in Alucast s.r.o. company. List of all defects occurring during manufacture is described in the second part. This catalog includes majority of defects from the cast proposal to finishing operations. There are also described causes, consequences and corrective actions.
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Quality-evaluation tools for Al-alloy die-castings
Rozman, Jiří ; Vašíček, Richard (referee) ; Čech, Jaroslav (advisor)
The goal of this diploma thesis is to on a practical example, with use of the quality system, describe the current state of input casting inspection in Tribotec Ltd. and output casting inspection of casting suppliers in this company and to suggest a new way of output casting inspection on Tribotec Ltd. with higher quality of spoilage rate survey of supplying casting already at the input inspection stage.
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Evaluation of statistical quality control (SPC) in solving the stability of processes in die castings
Hejduk, Oldřich ; Morávková, Jitka (referee) ; Čech, Jaroslav (advisor)
The aim of the theoretical part of this thesis is to describe the system of the aluminium casting alloys, with focus on the aluminium castings used for die casting. In this part of the thesis the different methods of the quality management are described. The practical application of these methods is described in the experimental part of this thesis, in which we focus on the evaluation of the statistical quality management and the process stability of the die casting parts of the selector mechanism cover. This part of the thesis also contains suggestion for the QFD method for this cast.
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