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3D Lattice Structures for Application in Selective Laser Melting technology
Červinek, Ondřej ; Škaroupka, David (referee) ; Vrána, Radek (advisor)
Additive technologies allow manufacturing of components with very complex shapes which are difficult to manufacture with conventional technologies. Among these technologies belongs the Selective Laser Melting (SLM). Suitable applications of SLM include manufacturing of light-weight 3D structures like lattice structure or an organic geometry called gyroid. This bachelor thesis is focused on creation of models of gyroid structure and its application to parts followed by manufacturing with SLM. Series of models were made with mathematical software. Implicitly defined equation were used for better geometry coordination of created models. Options utilization and manufacturability of gyroid structures were tested within application into turbocharger impeller. At the end of this thesis was successfully manufactured the impeller including two types of gyroid structure (single-gyroid and double-gyroid)
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Research on process parameters for producing of a structured material made by Selective Laser Melting technology
Richter, Vladislav ; Koutný, Daniel (referee) ; Vrána, Radek (advisor)
Selective laser melting (SLM) is one of additive technologies which allows manufacturing of components with very complex shape. One of the examples are porous lattice structures which are used in cosmonautics or medicine due to its good mechanical properties and low weight. In this work the influence of processing conditions (laser power and laser scanning speed) on material properties and geometry of as-fabricated trusses is investigated. Wide range of laser powers (100–400 W) and laser scanning speeds (1000–10000 mm/s) were used to determine optimum process parameters. Truss size, morphology and internal porosity was investigated using optical 3D scanner and X-ray micro computer tomography (mCT). Based on executed measurements optimum processing conditions were determined to be 350 W and 3000 mm/s. It is possible to manufacture faster geometrically more precise structures with equal internal porosity due to optimization.
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Support structures for 3D printing from metallic materials
Hruboš, David ; Vrána, Radek (referee) ; Koutný, Daniel (advisor)
This bachelor’s thesis deals with additive technology selective laser melting, which allows creating 3D objects from metal powder. The support structures are required in this process to dissipate process heat and anchor the part to the base plate. Four new types of support structures were designed in this work. The functionality of the structures was verified and mechanical properties of structures were compared in a strength test.
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The study of the effect of additive manufacturing technology parameters Selective Laser Melting properties of the produced object
Žabka, Marek ; Koukal, Ondřej (referee) ; Vrána, Radek (advisor)
Metal additive technology currently finds use in a large number of industrial sectors. Mainly in domains such as aviation, medicine and astronautics, the emphasis is laid on mechanical and material properties of materials. This bachelor thesis deals with the research study of process parameters of technology Selective Laser Melting for material AlSi10Mg and stainless steel 316L. In thesis the impact analysis of main process parameters: laser power, scanning speed, hatch distance, layer thickness, especially on the porosity of the samples was carried out. Recommended settings for both materials were found based on the research of the current state. It was further found out the influence of parameters such as powder humidity or laser scan strategy.
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Design of lattice structures for additive manufacturing using Selective Laser Melting technology
Vrána, Radek ; Maňas, Pavel (referee) ; Koutný, Daniel (advisor)
Metal additive technology allows to create objects with complex shape that are very difficult to produce by conventional technologies. An example of such component is a porous structure which is composed of periodical truss cells. This diploma thesis deals with the prediction of the mechanical properties of very small lattice structures made of additive manufacturing technology Selective Laser Melting. Using the proposed test specimens it was found that real dimensions of the trusses varies with size and orientation to the base platform. It was proposed and tested samples for rod tensile test made of SLM. Based on the real information about dimensions and mechanical properties of rods were predicted mechanical properties of lattice structures. A lot of mechanical tests were carried out to obtain the real mechanical properties. Test results and conclusions are described in the thesis.
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Design of paddle shifts for formula student
Dugas, Martin ; Vrána, Radek (referee) ; Koutný, Daniel (advisor)
This bachelor thesis concerns design of paddle shifters for Formula Student. It deals in theoretical part with knowledge of today’s shifting mechanisms, additive manufacturing technologies and ways of weight optimization of parts. In design section, it covers with actual solutions of this problems, whereas the most important target was to minimalize mass and maximize stiffness of the whole mechanism.
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Review of materials used for the manufacturing by the Selective Laser Melting technology
Skalický, Petr ; Vrána, Radek (referee) ; Koukal, Ondřej (advisor)
This bachelor thesis aims to provide an overview of metallic materials (powders), which are used in the manufacture of parts and models with SLM (Selective Laser Melting) technology. It contains basic information about Rapid Prototyping (RP) technology and more detailed description of basic methods of RP, especially SLM. Next is a description of manufacture powders methods and its properties. The last section contains an overview of powdery materials as powders made of pure metal (one kind of metal material) and powders produced from metal alloys. This review focuses on the most important and most widely used materials for the manufacture of parts using SLM.
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The study of the effect of additive manufacturing technology parameters Selective Laser Melting properties of the produced object
Žabka, Marek ; Koukal, Ondřej (referee) ; Vrána, Radek (advisor)
Metal additive technology currently finds use in a large number of industrial sectors. Mainly in domains such as aviation, medicine and astronautics, the emphasis is laid on mechanical and material properties of materials. This bachelor thesis deals with the research study of process parameters of technology Selective Laser Melting for material AlSi10Mg and stainless steel 316L. In thesis the impact analysis of main process parameters: laser power, scanning speed, hatch distance, layer thickness, especially on the porosity of the samples was carried out. Recommended settings for both materials were found based on the research of the current state. It was further found out the influence of parameters such as powder humidity or laser scan strategy.
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Utilization of the modern method for a production of the prototype of the hair dryer handle
Vrána, Radek ; Slaný, Martin (referee) ; Sedlák, Josef (advisor)
Aim of this bachelor work is to design and produce two-part universal holder of ETA hair dryers. Holder is designed in 3D CAD system Autodesk Inventor and is produced by Rapid Prototyping technology using Fused Deposition method. From existing Fused Deposition Modeling prototype of bigger visual part is made silicon mold and cast from resin. There is evaluation of both methods considering technical-economical aspects in the end of my work. Process of design and production using both methods is documented and described. My work includes history of ETA, a.s. company, characteristics of Fused Deposition Modeling method and technology of casting to silicon mold. Prototypes will be used for further development of holders for ETA´s hair dryers.
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Design of the Střížov sewer network
Vrána, Radek ; Úterský, Michal (referee) ; Ručka, Jan (advisor)
The aim of this bachelor's thesis is to elaborate the proposal technical design of the drainage village Střížov by combined sewer network. The first part deals about the area of interest. In the next part the thesis deals with the design and description of the location of sewer with respect to crossing with existing utility lines. It is also processed hydrotechnical situation of dewatered area and detailed longitudinal profile of the main collector.
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