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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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Design and construction of multipurpose FDM 3D printer
Kyselica, Martin ; Bayer, Robert (referee) ; Jaššo, Kamil (advisor)
This thesis is aimed on a theoretical analysis of the issue of various 3D printing technologies with a deeper focus on FDM technology. The principles of the function, areas of use, their advantages and limitations are presented. Individual types of FDM 3D printers are compared. An analysis of the main components of the structure, movement mechanism and electronic components of common rectilinear Cartesian FDM 3D printers is created. A 3D model of a custom solution for the construction of a 3D printer of the CoreXY type is proposed. The printer is constructed and configured. Calibration and testing have been carried out.
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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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Home security system
Čada, Jan ; Burda, Karel (referee) ; Lattenberg, Ivo (advisor)
This master thesis deals with the design and implementation of a security system for a family house. It consists of a central control panel, a control keyboard and detectors connected using cables. The first part of the thesis discusses the electronic security and fire alarm systems, describing the individual elements of these systems and their different types. Magnetic contacts, fire detectors, sirens and a mains power supply with UPS function are selected from the current offer based on a comparison of parameters. In the next section, a block diagram of the whole system is designed. Raspberry Pi Pico development board with an RP2040 microcontroller is selected along with a GSM module SIM800L for SMS alarm notification and an Ethernet module with a Wiznet W5500 chip for the possibility of implementing a web interface. Schematics of the individual modules of the system are designed - for the central control panel, input module with PCF8574 circuit and two PCBs of the control keyboard module, which is equipped with a button keyboard with backlight, character LCD display type 1602 and proximity sensor VL53L0X for automatic lighting when person comes closer than a defined distance. PCBs are designed according to the schematics. Their manufacturing is then ordered, all components are mounted and the PCBs are placed in a 3D printed enclosure in the case of the control keyboard, and on the mounting plate of the metal cabinet in the case of the central control panel, according to the designed mounting plan. For the selected piezo sirens, covers are designed and 3D printed in the design of the selected Paradox NV5 motion sensors. In addition to the central control panel and the control keyboard, door and window contacts, fire detectors and sirens are installed in the house. The next part is dealing with the development of the control software for the central control panel and control keyboard in MicroPython language and the design of a custom communication protocol on the RS-485 bus for communication between the central control panel and control keyboard. Both control programs are based on the state machine principle, and their state diagrams are presented in the thesis. Part of the text is also focused on the development of the central control panel web interface and integration of the desinged system into the Home Assistant open-source automation system. The last part describes the activation and testing of the system in real conditions of a family house.
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Concept design of a multi-environment mobile robot
Zezula, Benjamin ; Burian, František (referee) ; Kopečný, Lukáš (advisor)
This thesis presents the design of a multi-enviroment mobile robot that combines the simple principle of movement both in water and on land. In particular, the design of a~four-wheeled vehicle is presented, whose innovation lies in the use of blades on the rear wheels. A suitable type of propulsion system is chosen based on a~study of~different types of~robots. During the research of already functional solutions, great emphasis is put on the advantages and disadvantages of~the different actuators as well as their mathematical and physical analysis. The proposed solution includes the proven design of four differentially controlled wheels for movement on land and the use of~blades on the rear wheels for movement in water. This concept is described in detail using a~mathematical-physical model, on the basis of~which a~working prototype has been developed. The thesis concludes with an experimental verification of~the agreement between the mathematical model and the real prototype. This verification focuses on the motion dynamics and the behaviour of the robot in different environments. The differences observed are attributed to external influences such as the resistance of the gears or the manufacturing tolerances of the individual components.
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Návrh autonomního vozidla
BAŠTÝŘ, Jan
The first part of the thesis deals with vehicle autonomy, its application, the levels of automation and then the problem. In the second part, the thesis focuses on artificial intelligence. A substantial part is devoted to Asimov's Laws of Robotics, as the founder of robotics. The practical part deals with the creation of a custom model of an autonomous vehicle, which is modelled in CAD software, printed out using a 3D printer and then assembled and set in motion for use in Agriculture 4.0. It is expected that this vehicle will be used, for example, in a greenhouse where it will collect the necessary data and can be modified if further needs arise.
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The effect of bio-pigments on the properties of PLA materials for 3D printing
Vacula, Jan ; Figalla, Silvestr (referee) ; Menčík, Přemysl (advisor)
This thesis deals with the influence of naturally derived dyes on the properties of polylactic acid (PLA) for 3D printing using the FDM method. In the production of 3D printing filaments, it was crucial to understand the behavior of bio-dyes within the material. Thermogravimetric analysis (TGA) was performed to determine the thermal stability of the bio-dyes. Based on the resulting thermal stabilities, seven bio-dyes were selected from which concentration series were prepared in the form of 3D printing filaments. The influence of adding bio-dyes to the PLA polymer matrix was defined using gel permeation chromatography (GPC). To assess the impact of bio-dyes on the mechanical properties of the materials, tensile testing and three-point bending tests were chosen. It was found that adding bio-dyes does not significantly reduce mechanical properties. Furthermore, UV stability was investigated through accelerated exposure in a chamber with a xenon lamp. The influence of UV radiation on individual bio-dyes was defined through colorimetric evaluation. The results were key for further development and optimization of the use of natural dyes in the manufacturing process of 3D printing filaments.
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Biomimetic patterns in 3D printed auxetic metamaterials
Bečka, Filip ; Vozárik, Andrej (referee) ; Lepcio, Petr (advisor)
Diplomová práce se zabývá implementací biomimetických vzorů do 3D tištěných struktur s důrazem na studium auxetického chování a mechanických vlastností. Za tímto účelem bylo navrženo a technikou depozice taveniny připraveno šest typů struktur. Jako materiál byl zvolen polyethylentereftalát glykol (PET-G). Pro mechanické testování byla použita statická zkouška v tlaku doplněna o video záznam, který sloužil pro stanovení Poissonova poměru a pro sledování vlivu implementovaného vyztužení na deformační chování struktur. Navržené biomimetické vyztužení ještě více zvýšilo již tak dobrou účinnost auxetické struktury absorbovat energii. U nejvyššího stupně vyztužení byla navíc pozorována výrazně rovnoměrnější makroskopická deformace struktury. Vyztužení vedlo rovněž ke zvýšení napětí na mezi kluzu a specifického modulu pružnosti u auxetických struktur, zatímco u neauxetických struktur vedl přídavek vyztužení naopak ke snížení specifického modulu. Nakonec byl sledován vliv vyztužení na auxetické chování struktury. Zapojení vyztužujících prvků vedlo ke zvýšení Poissonova poměru, nikoliv však k překlopení do kladných hodnot. U struktur byl pozorován výrazný efekt hranic, kdy byly naměřeny různé hodnoty Poissonova poměru v různých částech připravených struktur.
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3D tisk v dopravě
VESELÝ, Vojtěch
This bachelor thesis investigates the effect of 3D printing on the modification of vehicle interiors and exteriors, especially on older models. The theoretical part of the thesis deals with the history of 3D printing, the classification of printers according to materials and printing technologies. It also deals with the types of materials used in 3D printing, the basic components of a 3D printer and its use in transportation. The practical part of the thesis deals with the design of a multifunctional charging station and the specific implementation in a vehicle, including the selection of a suitable location. It also describes the creation and detailed drawing of a 3D model divided into four parts: the bottom part, the top part, the electronics hold and the wireless charging hold. It defines the electronics used, wiring diagrams and wiring. The final section is the 3D printing process and subsequent assembly of the device.
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