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A study on sintering technologies of Ti-6Al-4V alloy for implants
Bučková, Katrin ; Ohnišťová, Petra (referee) ; Píška, Miroslav (advisor)
This work contributes to the problem of individual replacements of worn human joints by applying new types of implants and materials, made using modern additive technologies (melting of metal powders by laser and electron beam). The main attention is paid to the method called Electron Beam Melting used in the ARCAM Q10plus. Analysis of samples of the sintered Ti6Al4V - ELI alloy is made from the point of view of production precision and quality after sintering in different technological modes and the surface quality reached after turning and tumbling, including measurement of other physical quantities.
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Modification of printhead for 3D print of concrete
Diakov, Jakub ; Paloušek, David (referee) ; Vespalec, Arnošt (advisor)
This bachelor’s thesis deals with the engineering design of the adjustment of the jet used for continuous 3d printing of the concrete mixtures which are used for the printhead which already exists. The main function of the jet is to shape and deposit the printed mixture in a way that it corresponds to the required geometry of the product. The thesis contains a research focused on the issues of 3D printing such as properties of concrete flow, influence of the shape and size of the end of the jet on printing and individual mechanisms related to the optimal use of these jets. The second part of the thesis contains the analysis of knowledge and the determination of the appropriate parameters for the construction of the jet. These parameters influence the geometry and the quality and effectiveness of production. The practical part of the thesis is focused on the possible structural design of the jet adjustment based on the knowledge from the research part of the thesis. The practical part also deals with the design of the jet in a way the flaws and imperfections occurring in case of the previous constructions of the jets. In case of use of the jet designed in the corresponding way, the production can be substantially accelerated, and the quality of products can be substantially higher.
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Use of 3D printing in the production of functional prototypes for automotive
Mikulášek, Marek ; Prokop, Aleš (referee) ; Řehák, Kamil (advisor)
This thesis deals with the 3D printing of composite materials. The constant development of this technology has enabled the application of this method for the production of prototypes, but also functional components. The theoretical part deals with the study of composite materials and the principle of production using additive technology. In the practical part, an analysis of the suitability of part processing using the 3D printing method is performed on a specific component and than applicated to the assembly hall located in ŠKODA AUTO a.s.
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Design of forming tool production technology using the additive method of 3D printing
Obadal, Jan ; Vašíř, Jakub (referee) ; Sedlák, Josef (advisor)
This bachelor thesis deals with a plan of a forming device manufacturing technology utilising additive methods of 3D printing. The theoretical part of this thesis deals with the characteristics of sheet metal forming technology and the characteristics of additive technology. The practical part of this thesis contains a breakdown of the current state and it deals with usage of the current forming tool. In terms of the practical part, there is an innovation draft whose goals it to speed up the manufacture of a particular pressed piece. The principle of this innovation is the utilisation of a single-purpose machine which is optained through the additive method of 3D printing. The optimal combination of printing parameters and tool geometry are found through prototype testing. To keep the product measurements accurate requires modified proportiong of the semi-finished product. The final tool is capable of bending two pressed pieces at the same time. During the process of bending, it is necessary to review the measurements of every 25th pressed piece and to revise the position of a bottom dead center. The lifetime of this innovative tool is set to 600 pieces. Technological and economical evaluation shows return of invesments and reduced time due to the application of this innovation, thanks to which the bending time is reduced by 50 %.
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Using 3D printing in HVAC
Malovaný, Ondřej ; Rubinová, Olga (referee) ; Uher, Pavel (advisor)
In the experimental part of this thesis there is an assessment of pressure bearing capacity of cylindrical nozzles printed using a 3D printer. In the theoretical part of this diploma thesis there are outlined the types of additive technologies focusing on the development of FDM printers, open designs and RepRap project. Descripti-on of the production process of 3D printing and application of additive technolo-gies in the field of HVAC. In the project part, the design of the forced ventilation of the Sports Hall is solved. The object is assessed in terms of heat losses and profits for priority rooms of functional units. Heat load coverage is carried out by air-conditioning equipment. In addition, a project is drawn up which contains all the text and drawings, including technical specifications and regulatory schemes.
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Design of oxygen filter for 3D metal printer
Ondra, Martin ; Paloušek, David (referee) ; Suchý, Jan (advisor)
In medical branches alloys on the basis of titanium are commonly used, however, in some of the medical applications it emerged that the usage of alloys on the basis of magnesium is more convenient, for example in orthopaedic surgery for the implant fabrication. Managing of processing of magnesium using the technology Selective Laser Melting would enable to produce complex structures supporting the production of cells and recovery of bones. One of the problems when processing the alloys on the basis of magnesium is the production of residual oxygen. This problem can be solved with the usage of an oxygen filter that is integrated in the circuit of inert atmosphere. This bachelor´s work deals with the construction of this filter for 3D metal printer SLM Solutions 280HL v1.0. This device enables to filter up to 123 m3/h of the gas with the output purity 100 ppt (1,0 × 10-8 %). The device separates oxygen continuously during the whole manufacturing process. The construction of the device enables the attachment to other SLM Solutions company machines.
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Analysis of mechanical properties of composite materials printed by additive 3D printing technology
Mudrák, Michal ; Joska, Zdeněk (referee) ; Sedlák, Josef (advisor)
This thesis deals with the analysis of mechanical properties of composite materials used for 3D printing by Markforged company. The theoretical part is focused on the characterization of composite materials and analysis of mechanical tests. The experimental part deals with the production of test specimens for specific mechanical tests (tensile test, Shore D hardness test and bending test). The test sapples with Onyx base material are individually reinforced with carbon and high-temperature glass fibers (HSHT). There are statistically evaluated selected parameters for individual mechanical tests (tensile strength, elongation, modulus of elasticity, Shore D hardness, bending stress and bending deformation). The thesisis completed by comparing selected parameters of composite materials with overall recommendations for users.
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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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