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1
Content available remote Badanie płaskości oraz chropowatości powierzchni modeli cienkościennych wykonanych technologią przyrostową Fused Deposition Modeling
Zmarzły Paweł, Klamka Magdalena, Szwej Wiktoria, Wróblewska Eliza
Zarządzanie Przedsiębiorstwem
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2023
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Vol. 26, nr 2
27--32
EN
3D printing technologies are gaining popularity year by year. They allow for a significant improvement in the production of prototypes and utility models. In addition, 3D printing facilitates the production of thin-walled elements and complex shapes, which is difficult when using traditional manufacturing methods. It should be noted that the technological parameters of 3D printing, such as the printing orientation and the thickness of a single layer, are very important because they affect the printing time, material expenditure and the dimensional accuracy of the printed details. There are many types of 3D printers, the operating principle of which and the building material used are different. However, one of the most popular and available types of additive manufacturing is Fused Deposition Technology. Therefore, detailed studies of this technology are particularly desirable by economic entities. The article presents research aimed at assessing the influence of the print direction and the thickness of a single layer of a building material on the flatness deviation and the 3D surface roughness parameters. Special thin-walled models were designed and printed from PLA material using a printer named MakerBot Replicator+. The research results presented in the article showed that the direction of printing and the thickness of a single layer of building material in the Fused Deposition Modeling Technology affect the roughness parameters, flatness and printing time of the produced models.
2
Content available Effect of surface modification by acetone vaporization on the structure of 3D printed acrylonitrile-butadiene-styrene elements
Marciniak D., Szewczykowski P., Czyżewski P., Sykutera D., Bieliński M.
Polimery
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2018
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T. 63, nr 11-12
785--790
EN
The internal structure of samples produced by additive manufacturing (AM) technology of copolymer acrylonitrile-butadiene-styrene (ABS) was studied by microcomputer tomography (micro-CT). The results of micro-CT were correlated with the mechanical properties of samples. The aim of this paper was to demonstrate the acetone vaporization influence on the structure and mechanical properties of ABS samples printed with additive manufacturing technology. Samples were printed on three different devices and scanned with micro-CT after acetone vapors treatment. Mass and hardness of the samples were measured. Finally, the static tensile test was performed. Irregularly spaced voids, which directly affected samples properties, have been detected. Under the influence of acetone vaporization, the properties of the samples have changed such as: number of voids, mass, hardness, tensile strength.
PL
Strukturę wewnętrzną próbek wykonanych metodą technologii przyrostowej z kopolimeru akrylonitryl-butadien-styren (ABS) zbadano za pomocą mikrotomografu komputerowego (CT). Wyniki skanów CT skorelowano z właściwościami mechanicznymi próbek. Oceniano wpływ oddziaływania par acetonu na strukturę i właściwości próbek z ABS wykonanych w technologii przyrostowej. Próbki przygotowano z zastosowaniem trzech różnych urządzeń i po waporyzacji acetonowej zeskanowano je za pomocą mikrotomografu. Wyznaczono masę, twardość oraz przeprowadzono statyczną próbę rozciągania próbek. W strukturze elementów z ABS stwierdzono obecność nieregularnie rozmieszczonych porów, wpływających na właściwości próbek. Pod wpływem waporyzacji acetonowej zmieniły się właściwości próbek, takie jak: liczba porów, masa, twardość oraz wytrzymałość na rozciąganie.
3
Content available remote Effect of printing parameters on the mechanical properties of parts fabricated with open-source 3D printers in PLA by fused deposition modeling
Ouhsti M., El Haddadi B., Belhouideg S.
Mechanics and Mechanical Engineering
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2018
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Vol. 22, nr 4
895--907
EN
3D polymer-based printers have become easily accessible to the public. Usually, the technology used by these 3D printers is Fused Deposition Modelling (FDM). The majority of these 3D printers mainly use acrylonitrile butadiene styrene (ABS) and polylactic acid (PLA) to fabricate 3D objects. In order for the printed parts to be useful for specific applications, the mechanical properties of the printed parts must be known. The aim of this study is to determine the tensile strength and elastic modulus of printed materials in polylactic acid (PLA) according to three important printing parameters such as deposition angle, extruder temperature and printing speed. The central composite design (CCD) was used to reduce the number of tensile test experiments. The obtained results show that the mechanical properties of printed parts depend on printing parameters. Empirical models relating response and process parameters are developed. The analysis of variance (ANOVA) was used to test the validity of models relating response and printing parameters. The optimal printing parameters are determined for the desired mechanical properties.
4
Content available remote A software tool for automatic geometry generation of a micro turbine
Hoffmann S. P., Rückert F. U., Theis D., Ruffino A. G., Lehser-Pfeffermann D., Hübner D.
Mechanics and Mechanical Engineering
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2018
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Vol. 22, nr 2
465--478
EN
Heat recovery plays an important role in increasing the efficiency of renewable energy facilities like biomass furnaces, solar power plants or biofuel combustion engines. As the overall efficiency of the facilities can be increased by recovering the energy. The available waste heat can be converted directly into mechanical energy, pressure or subsequently converted into electrical energy by coupling the expansions machine with a generator. The waste heat can be converted by Organic Rankine Cycle (ORC). Therefore, an expansion machine, e.g. a turbine is required. Also small amounts of waste heat can be recovered, if so-called micro turbines are used. Design and construction of such micro turbines always follow fixed rules. Aim of this work is to explain the rules how to design a micro turbine. Furthermore, our workflow and a software tool which follows these rules should be presented.
5
Content available remote Tribological properties of 3D printed components
Giemza B., Domański M., Deliś M., Kapica D.
Journal of KONBiN
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2018
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No. 48
447--463
EN
Additive manufacturing technology is developing in many industries, including aviation, automotive and others. 3D printing offers new possibilities in the field of designing and manufacturing of machines and devices’ components. The paper presents the results of tribological investigations of components produced in FDM printing technology. The authors presented the evaluation of sliding properties of the model friction couple – block on ring type – of available thermoplastic polymers and polymers’ composites under dry friction conditions. The authors assessed the influence of material type and printed structure on resistance to motion of prepared samples.
PL
Technologia wytwarzania przyrostowego jest rozwijana w wielu obszarach przemysłu, w tym w lotnictwie, motoryzacji i innych. Druk 3D oferuje nowe możliwości konstrukcyjne i wykonawcze urządzeń i elementów konstrukcyjnych. W artykule zaprezentowano wyniki badań właściwości tribologicznych elementów wytworzonych w technologii druku 3D FDM. Autorzy dokonali oceny właściwości ślizgowych modelowego węzła tarcia – typu rolka-klocek – dostępnych polimerów termoplastycznych oraz kompozytów polimerowych w warunkach tarcia suchego. Określono wpływ rodzaju materiału oraz struktury wydruku na opory ruchu wytworzonych próbek.
6
Content available 3D printing technology as a tool in fabrication of elements for wheel model
Leśniewicz P.
Acta Innovations
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2017
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no. 23
5--16
EN
This paper illustrates an experience related to the use of 3D printing technology during the fabrication of elements for a supporting arm. The arm was a part of a test stand designed for an investigation of rotating wheels in contact with the ground. One of the crucial elements of a supporting arm is the hub, which was originally made from aluminium, however it was decided to replace it by the one made from ABS using 3D printing technology. The author decided to describe difficulties encountered during fabrication of the hub, together with a set of recommendations for future use of 3D printers.
7
Content available remote Tensile properties of additively manufactured polyetherimide parts
Gajdoš I., Spišák E., Jachowicz T., Garbacz T.
Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
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2016
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z. 88 [293], nr 3
189--197
EN
This paper presents the results of a study of evaluating the influence of path generation strategy on tensile properties of samples made by additive manufacturing technology FDM (Fused Deposition Modeling). Several scientific studies were focused on the influence of path generation strategy on mechanical properties of deposited material. ABS and PLA are the most investigated materials used in FDM. This paper is aimed to determine the influence of selected path generation strategies on tensile strength of parts fabricated with ULTEM 9085 thermoplastic. The results obtained in experiments confirmed that proposed path generation strategy allowed to increase tensile strength by 25% compared to a situation when the samples were fabricated with default path generation setting.
PL
W artykule przedstawiono wyniki badań oceniających, w próbie rozciągania, wpływ strategii generowania ścieżki na właściwości mechaniczne próbek wytworzonych w technologii osadzania topionego materiału (ang. FDM - Fused Deposition Modeling). Liczne badania naukowe były skupione na wpływie strategii generowania ścieżki na właściwości mechaniczne materiału osadzanego. Najczęściej badanymi materiałami stosowanymi w technologii FDM są ABS oraz PLA. Celem niniejszego artykułu określenie wpływu wybranych strategii generowania ścieżki na wytrzymałość na rozciąganie elementów wytworzonych z termoplastu ULTEM9085. Wyniki badań eksperymentalnych potwierdziły, że proponowana strategia wytwarzania ścieżki pozwoliła zwiększyć wytrzymałość na rozciąganie o 25% w porównaniu z sytuacją, gdy próbki były wytwarzane przy użyciu domyślnych ustawień generacji ścieżki.
8
Content available remote Improving surface finish quality of FDM prototypes
Gajdos I., Slota J.
Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
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2010
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z. 80 [274]
87-90
EN
Rapid prototyping technologies decrease production time and costs in engineering industry but also in other industries. One of most widely used technology FDM suffers under low surface finish quality. This paper is aimed on research of surface finishing technologies applicable to improve the quality of FDM prototypes surface finish. Pretreated samples were blasted with sodium bicarbonate and glass beads. The values of Ra and Rz were measured on the samples and compared the impact of selected blasting medium and blasting conditions on surface finish quality of FDM prototypes.
9
Content available remote Complex approach to the reverse engineering techniques
Gajdos I., Kat'uch P.
Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
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2010
|
z. 80 [274]
81-86
EN
This paper describes possibilities of integration newest technologies in reverse engineering process. The integration of computer tomography and FDM rapid prototyping technology allows to reproduce plastic parts without any documentation (blueprints, CAD model...) in very short cycles lasting few hours. Even complex shaped parts, with difficult geometry become no problem for combination of these two technologies, where the conventional approach in reverse engineering would last weeks if ever possible. On experimental part with complex geometry was presented modern complex approach in reverse engineering including measuring and digitalizing of part, data preparation for printing, printing and finishing of new part. Computer tomography was also used to compare shape and dimensions of original and reproduced part.
10
Content available remote Szybkie prototypowanie w technologii FDM (Fused Deposition Modelling) - przykłady zastosowań
Płatek P., Kret M., Bis J.
Mechanik
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2009
|
R. 82, nr 11
952-952
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