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Feasibility study
Beneš, Michal ; Sliwková, Petra (referee) ; Pirožek, Petr (advisor)
This thesis develops a feasibility study for the introduction of a new product. The aim of the thesis was to evaluate the technical and economic feasibility of the project. With the help of market research and analysis of the external environment, the current market situation was mapped and a SWOT analysis was performed. In the technical part, the design of the production process was developed and the production time was determined. The economic part quantified the cost and price of the finished product. In the techno-economic evaluation, the return on equity was determined, the break even point was determined and the risks of implementation were found and arrangements to minimize them were proposed.
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Design modification and CFD simulation of the filling valve
Klíma, Štěpán ; Kohút, Jiří (referee) ; Klas, Roman (advisor)
This thesis deals with the design of a filling valve guide using a metal 3D printing method for application in a hydraulic press. The production of a filling valve guide using traditional forms of manufacturing in terms of labour, production, technology and time-challenging processes and the metal 3D printing method can help to overcome some of these challenges. The introduction of this paper is concerned with explaining the function of filling valves in the hydraulic press mechanism and a brief introduction to valve guide manufacturing technologies, including metal 3D printing technology. This is followed by an explanation of the new design in terms of the technology used. A strength analysis using FEA is then developed to determine the functionality of the valve guide and to optimise its shape. In this section, an iterative procedure was used to reduce the reduced stress in the ribs to 68 % of the reduced stress of the original design by changing the valve guide geometry. At the same time, a theoretical introduction to FEM is written, including an explanation of the non-linearities in FEM. This is followed by a comparison of the hydraulic losses due to oil flow through the original valve and the valve with the modified valve guide. Similar to the FEM chapter, a theoretical section is also written introducing CFD, mesh generation for CFD and turbulence models.
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Verification of corrosion resistance of hyperduplex austenitic-ferritic stainless steel
Trkola, Ota ; Pernica, Vítězslav (referee) ; Kaněra, Miloš (advisor)
The bachelor's thesis deals with the corrosive resistance of a cast hyper duplex austenitic-ferritic steel. It is a prospective stainless steel that could be applied in foundry practice as a casting material in the future. The theoretical part contains an analysis of the principles of corrosion and the influence of the chemical composition on the structure and properties of steel. A significant part concerns duplex steels, especially their resistance to local types of corrosion expressed by the theoretical PRE number. The practical part of the work focuses on testing the corrosion resistance of hyper duplex steel using the corrosion test according to the ASTM G48 standard. The evaluation compares the corrosion attack with other alloys.
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Design of a group milling fixture for clamping components
Kalous, Jan ; Dvořák, Jaromír (referee) ; Zemčík, Oskar (advisor)
The thesis deals with the design of a group milling jig for four different shaped components. These parts are components of a baking line and are designed to clamp baking matrices for wafer production. The semi-product for all the parts is a casting made of EN-GJS-400-15, cast iron with spheroidal graphite. Machining on a horizontal milling centre MS NH5000 DCG from DMG Mori Czech s.r.o. was chosen to produce all four parts. A list of tools and gauges was made. Subsequently, a technological process was created for the selected part with the designation HAAC-62836-001. Then the cutting forces from the individual cutter inserts, clamping, and friction forces were calculated to verify that the machined piece could move in the jigs. This thesis includes calculations of both jigs and evaluation according to the technical aspect.
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Application of modern technologies for the production of spare parts airsoft guns
Král, Ondřej ; Zemčík, Oskar (referee) ; Jaroš, Aleš (advisor)
This bachelor thesis describes design and manufacture of airsoft spare parts. Selected spare parts were hammer and spring holder, which were designed in 3D parametric software Autodesk Inventor 2016. Chosen method to manufacture spare parts, was Fused Modeling Deposition, which is part of Rapid Prototyping technology. The device for producing parts was 3D printer uPrint. The manufacture of silicon mould was based on printed spring holder, which was used for parts manufacture, by casting plastic materiál. Thesis is completed with a technical-economical evaluation, in which it was found that the silicon mould casting is more profitable in the production of more parts.
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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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Design of a dedicated manipulator
Chmela, Martin ; Tůma, Zdeněk (referee) ; Pavlík, Jan (advisor)
CHMELA Martin: Design of a dedicated manipulator In this bachelor thesis there is a thorough analysis of the problem of manipulation with self-supporting forms in foundry industry. Proposal of variant solutions and their technical and economic evaluation. Construction design of the specified variant - 3D model. Computational report and drawing documentation of selected sections.
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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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