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Utilization of light emitting diode lighting for cycle tracks
Mikula, Martin ; Klapka, Milan (referee) ; Paloušek, David (advisor)
This bachelor’s thesis deals with construction of the illuminational modules for cycle tracks. Result is design of lamp for lighting at cycle tracks, staffed by the LED diodes. Single parts bachelor’s thesis are: - text report on the development and current state lighting - development LED diodes in the world -analysis my project - computer visualizations of the final design and technical documentation
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3D printing quality evaluation using optical digitization
Schäffer, Matúš ; Vespalec, Arnošt (referee) ; Paloušek, David (advisor)
This thesis focuses on description of selected differences in printing strategy and functionality of proprietary and commercial slicer. These are tested by specially created experiments using the same FDM table printer and filament. 3D optic digitisation is employed to support accurate measuring of individual experiments. Then 3D scans are examined in inspection software which allows to attain the figures describing dimension and geometry accuracy. Subsequently, the results are analysed and the conclusion is defined.
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Development of process parameters for the stereolithography
Vítek, Jan ; Škaroupka, David (referee) ; Paloušek, David (advisor)
This bachelor thesis deals with the search for optimal process parameters to reach a high strength of the Detax Solflex model material, with the DLP (digital light processing) 3D Solflex 650 printer. In the first part of this thesis the principle of printing using a laser and using a DLP projector and their comparison are presented. Further information about materials and impact of the process parameters on a printing are discussed. Based on a knowledge two assumptions were set: influence of exposure time and influence of layer thickness on strength. Firstly, samples were tested by the hardness Shore D test and the results from the test were compared. New samples for the stress test with the optimal set of parameters given by the previous test were printed and tested. Process parameters influence on strength was determined from the achieved results.
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Mechanical design of 3D printer head for manufacturing of concrete parts
Slavíček, Jakub ; Brandejs, Jan (referee) ; Paloušek, David (advisor)
This bachelor thesis deals with a structural design of modular printer head used for 3D print of cementitious mixture. Printer head is designed for continuous printing of cementitous mixture with added crushed stone and accelerator. The main function of printer head is extrusion of the final mixture with established print parametres. In the thesis, the research was conducted into existing 3D concrete printing methods, possibilities of concrete transportation and material characteristics. The analysis is carried out in the second chapter, where the knowledge from the first chapter is evaluated and factors influencing the extrusion of concrete are defined. The design part of thesis specifies basic printing parametres and contains different alternatives of solution. The chosen conceptual solution is elaborated in detail and construction solution includes verifying calculations.
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Mechanical properties of 3D printed PLA plastic parts
Novosád, Ivan ; Dočkal, Kryštof (referee) ; Paloušek, David (advisor)
3D printing is being widely used by public and also in industry. The main advantage of 3D printing is rapid making prototypes. That is the reason why it is needed to know what the mechanical properties of the material that is being used are. This thesis is about making research of knowledge about 3D printing and mechanical properties of printed parts. Main task was comparing materials used in 3D printers and find out which producer makes materials with the best tensile strength. 5 producers were selected to be compared in this test. From each producer was bought PLA filament in natural colour, this material was then used to print testing specimens. All specimens were tested on maximum tensile strength and Young's elastic modulus and then was calculated the confidence interval for each producer.
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Digitizing of human tissues
Matejková, Monika ; Koutný, Daniel (referee) ; Paloušek, David (advisor)
The goal of this bachelor thesis is to build up a compact overwiew of recent development in medical visual methods, which allow making three-dimensional geometric datas and overwiew of scanning methods outside geometry surface of human body with next digitalizing. There are describing principles of each ones visual methods, their possible advantages, disadvantages, which outputing forms we receive. In next part of this thesis there are describing possibilities of processing acquired datas for making 3D geometry models. Work is completing with appreciation of obtained knowledges and definition of trends future development.
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Design automation of simple inject moulds for tool factory
Žváček, Michal ; Dočkal, Aleš (referee) ; Paloušek, David (advisor)
The dissertation is concerned with automatization proposal of simple injection moulds for plastics. The dissertation is concentrating on the process of CAD design with the aim of make it more effective and automate by the help of 3D parametric strickle board of moulds. It serves for rapid proposal of basic mechanism of the tools. Strickle board of the mould is managed by length of side moulding plate in required range from 300 to the 700mm. For managing of standardized parts was created web portal, which includes database of single parts. These parts can be simply insert to the groups of moulds by the help of hypertext links in software Catia V5. Dissertation includes description of whole system automatization and matching of the new way of CAD design with the original.
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Adjustable Wrist Orthosis
Molinari, Petr ; Gajdoš, Petr (referee) ; Paloušek, David (advisor)
This bachelor‘s thesis is focused on construction of adjustable wrist orthosis using the method of Rapid Prototyping. The first part is devoted to the basic principle of Rapid Prototyping and description of the selected aditive technologies. The common part deals with an overview of upper limb orthotics, division of braces and presentation of some mass-produced models. In the section devoted the construction is described the whole process of designing orthosis.
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The impact of metal powder recycling on the porosity of parts produced by Selective Laser Melting
Sůkal, Jan ; Hudák, Radovan (referee) ; Paloušek, David (advisor)
Diploma thesis deals with the influence of recycling of powder steel 1.2709 on porosity of parts processed by SLM technology. Theoretical part of this thesis gives an overview of the influence of selected process parameters of this additive technology on the porosity of manufactured parts. The presence of pores in the material is the main cause of worse mechanical properties compared to conventionally manufactured materials. Since the advantage of this technology is the possibility of wasteless production, one of the possible causes of pore formation and degradation of properties of the powder material is due to standard recycling by means of sieving to remove the contaminants generated during the construction. This paper compares the porosity of parts produced by two different machines, analyzes the possible consequences of sieving on powder properties, establishes recommendations for setting the recycling process, and compares the degree of influence of process parameters on porosity.
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Design of peristaltic pump
Peslar, Jiří ; Anderle, Martin (referee) ; Paloušek, David (advisor)
The subject of this thesis is a design of the volumetric infusion pumping unit specifically used for a human medicine purposes. The pumping unit is constructed by the linear peristaltic pump. The document focuses on mechanical design and disposition of particular components of unit and placement of electronic sensors and contacts. The thesis is elaborated as a part of infusion pump development project for a limited company.
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