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3D printing of a non-dismantling assembly
Halíř, Jan ; Drbal, Martin (referee) ; Kalivoda, Milan (advisor)
The bachelor's thesis deals with 3D printing of prototype non-disassemble assemblies. In the theoretical part, the individual most used printing technologies, the types of plastic and metal materials used, printers, 3D scanners, and their use in medicine, construction and engineering was described. In the practical part, FDM technology was used to print the ball joint, the french key, and the rolling bearing, the functionality of which were tested. In the last part, the results of the prints were evaluated based on the selected parameters and material about their functionality.
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Optimization of infill selection with an emphasis on maximum dynamic resistance
Konvalina, Michal ; Svoboda, Petr (referee) ; Jopek, Miroslav (advisor)
The thesis deals with the study of the effect of different wall thicknesses of 3D printed infill patterns at constant cross-sectional area on their final properties under static and dynamic loading. Based on literature study, two experimental methods are chosen. The quasi-static test and the Taylor anvil test. For the experiment, square and hexagonal grid specimens are printed using FDM technology from PLA material. Quasi-static test is used to measure the static properties such as maximum compressive strength, yield stress, modulus of elasticity and to derive material model of Johnson-Cook. The dynamic impact test TAT is used to evaluate different types of patterns at high impact velocities. In ANSYS, the specimens that resisted the highest impact velocities in TAT are simulated and strain rate sensitivity parameter is optimized for the specific velocity. The highest dynamic resistance was achieved by a square infill pattern with wall thickness of 0,4 mm at an impact velocity of 37 ms-1.
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Use of 3D printed models for Replicast technology
Komenda, Lukáš ; Štěpán, Radim (referee) ; Bořil, Petr (advisor)
This bachelor's thesis is focused on the possibility of casting a 3D printed model using Replicast® technology. The theoretical part provides an overview of the application of rapid prototyping technology in foundry industry and the advantages of the Replicast® process. The practical part is focused on the production of a 3D printed model, the creation of a shell, and subsequent casting. In the conclusion of the thesis, the individual results are compared and the best approach is evaluated.
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Construction of a small portable 3D printer
Netušil, Jan ; Vyroubal, Petr (referee) ; Bayer, Robert (advisor)
The study is dedicated to the description of 3D FDM printing technology, compares different types of 3D FDM printers and analyzes key components, especially those necessary for a stable portable 3D printer design. It also includes the specific design of the portable 3D FDM printer solution, its assembly, the actual enhancement of the design, and the design and implementation of the braking arresting elements. It also addresses the printing testing of advanced construction materials suitable for 3D FDM printing and provides a cost estimation and evaluation of the cost-effectiveness of building a portable 3D FDM printer.
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Autonomous Beehive
Václavič, Jiří ; Nosko, Svetozár (referee) ; Smrž, Pavel (advisor)
The aim of this work was to construct an electronically controlled beehive. A crucial element of the project was to conduct thorough research on existing IoT and other electronic solutions used in beekeeping. It was essential to analyze the available hardware and software technologies that could be applied to the given issue and select those most suitable for this purpose. Based on the acquired knowledge, individual parts of the beehive were designed and manufactured using a 3D printer. These parts were specially modified to enable the integration of various sensors. An integral part of the solution is also the ventilation system and the custom design of motorized beekeeping frames, which allow for automatic honey collection. Sensor outputs and other data needed to inform the beekeeper about the colony's status are displayed on a web server, to which they are sent via MQTT communication.
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3D printing of ceramic materials based on barium titanate with crystallographic preferred orientation
Pišťák, Jan ; Drdlík, Daniel (referee) ; Částková, Klára (advisor)
In this work, textured barium titanate (BTO) ceramics were prepared using 3D ceramic printing technology. We achieved preferential grain growth in polycrystalline ceramics by using template grain growth on the platelet particles. Firstly, we prepared platelet particles with preferential crystalline orientation in the [001] direction by molten salt synthesis and topochemical microconversion. Subsequently, an acrylate-based photosensitive suspension was optimised for use with BaTiO3 ceramic powder. Samples with different amounts of platelets were printed from these suspensions. The overall crystallographic texture of the sintered ceramics increased with increasing amounts of platelets in the suspension. The maximum value of Lodgering factor was achieved after adding 5 wt. % of the platelets (F001 = 42%). It was further found that the addition of platelets resulted in a decrease in the grain size of the sintered texture. The particle size reduction did not affect the porosity and, regardless of the amount of platelet particles added, relative densities in the range of 96-98 % of the theoretical density were achieved. The feasibility of preparing textured barium titanate materials by 3D printing using template grain growth was confirmed.
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Assessment of the use of 3D printing technology in the automotive industry
Ondriska, Josef ; Libich, Jiří (referee) ; Binar, Tomáš (advisor)
This thesis deals with 3D printing technology and analysis of various polymeric additive manufacturing materials, with a focus on their application in the automotive industry. In the experimental part, three types of material are tested for mechanical properties, both without degradation and after degradation by a climate chamber. In the tensile strength test, the possibility of using acoustic emission as a diagnostic method was verified. From the results obtained, a specific part used in the automotive industry was designed. The work also includes the design of a stationary
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Evaluation of the quality of 3D scanned objects
Paštěka, Marek ; Jaššo, Kamil (referee) ; Vyroubal, Petr (advisor)
This thesis deals with problematics of trasfering real life objects into digital data using 3D scanners. Thesis deals with various 3D scanning technologies and errors of these methods. Main part of this thesis deals with special situations, during which a topology defect may likely occur. These defects most often seriously impact the resulting model in a negative way. For the purpose of maximally describing the issue at hand some very extreme edge scenarios were chosen for these experiments. Thesis also deals with development of a turntable device based on an Arduino microcontroller to help in the process of 3D scanning.
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SCARA control system
Cviček, Pavel ; Bradáč, Zdeněk (referee) ; Benešl, Tomáš (advisor)
This thesis focuses on the possibility of using a SCARA robot with an alternative control system from Beckhoff for 3D printing. The implemented functionalities will be described and the solution will be properly documented. Furthermore, currently occurring problems will be addressed and solutions will be proposed for them. For the proposed application, possible solutions will be described including a detailed design and control program for the implementation of the functionality. A tutorial will be included to guide the user through setting up the slicer and controlling the visualization.
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