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Wyszukujesz frazę "Additive Manufacturing" wg kryterium: Temat


Tytuł:
Opening new opportunities for aeronautic, naval and train large components realization with hybrid and twin manufacturing
Autorzy:
Rauch, Matthieu
Hascoet, Jean-Yves
Powiązania:
https://bibliotekanauki.pl/articles/2171769.pdf
Data publikacji:
2022
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
additive manufacturing
hybrid manufacturing
twin manufacturing
Opis:
Additive Manufacturing (AM) consist in producing parts by depositing material in successive layers. These step-by-step processes proposes new innovative directions for high value components: complex geometries are accessible without strong efforts (such as hollow or lattice structures which dramatically reduce the component weight while keeping their at least similar mechanical properties), assemblies can be simplified, spare parts can be realized at demand... Hence, AM has benefitted from large research efforts over the last decade, almost all existing industrial sectors have benefitted from them. This paper introduces some opportunities and the associated challenges attached to Additive Manufacturing, to produce large metallic components for naval aeronautics and train industries. In particular, two innovative approaches are discussed in details: hybrid manufacturing and twin manufacturing. Hybrid manufacturing consists in integrating AM together with other processes for the realization of components, with the objective to benefit from the interests of each process while avoiding its drawbacks. Hence, AM can realize complex geometries or offer low buy-to-fly ratios while high speed machining generates very good surface properties (position, roughness). Processes can be carried out sequentially or simultaneously on the features to manufacture and finding the optimal manufacturing work plan can be challenging. The paper introduces some hybrid approaches developed in the laboratory. Twin manufacturing uses models and multiphysics simulation methods to create a digital clone of the process implementation within the manufacturing environment. Manufacturing preparation and optimization can be carried in the virtual workshop where various configurations and choices can be tested before being selected. To enhance its accuracy, the digital twin can also be fed by monitoring data captured during the process. Several digital twins developed in the laboratory are provided. The paper is illustrated with several proof-of-concept parts made with SLM, LMD, WAAM and hybrid approaches in the laboratory. Among them, a hollow propellers that has the same hydrodynamics efficiency for a reduced weight for the naval industry, an aircraft structural panel that demonstrates simplified assemblies increased performance/mass ratio, a train component that shows the ability to produce structural parts at demand.
Źródło:
Journal of Machine Engineering; 2022, 22, 4; 5--20
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High-Efficiency Cooling System Using Additive Manufacturing
Autorzy:
Woo, Yeong-Jin
Nam, Dong-Ho
Lee, Seok-Rok
Kim, Eun-Ah
Lee, Woo-Jin
Yang, Dong-Yeol
Yu, Ji-Hun
Park, Yong-Ho
Lee, Hak-Sung
Powiązania:
https://bibliotekanauki.pl/articles/2049198.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
additive manufacturing
DfAM
Design for Additive Manufacturing
cooling system
lattice structure
simulation
Opis:
In this study, we propose a cooling structure manufactured using a specialized three-dimensional (3D) printing design method. A cooling performance test system with complex geometry that used a thermoelectric module was manufactured using metal 3D printing. A test model was constructed by applying additive manufacturing simulation and computational fluid analysis techniques, and the correlation between each element and cooling efficiency was examined. in this study, the evaluation was conducted using a thermoelectric module base cooling efficiency measurement system. The contents were compared and analyzed by predicting the manufacturing possibility and cooling efficiency, through additive manufacturing simulation and computational fluid analysis techniques, respectively.
Źródło:
Archives of Metallurgy and Materials; 2021, 66, 3; 689-693
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Topology optimization of structures with stress and additive manufacturing constraints
Autorzy:
Fiuk, Grzegorz
Mrzygłód, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/1839646.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
topology optimization
manufacturing constraint
additive manufacturing
Opis:
The paper presents a new methodology dedicated to design for additive manufacturing. Based on a hybrid algorithm of topological optimization, the method enables application of advanced constraints and validates solutions “on the fly” using virtual prototyping. Advanced constraints consider the influence of directions of additive manufacturing as well as the equivalent stress. In the optimization framework, real material properties related to three manufacturing directions were considered. The new design methodology is illustrated by benchmark tests and examples of wrist-hand orthosis topology optimization in which stress and manufacturing constraints were taken into account. As demonstrated by the conducted comparison tests with available commercial tools, the solutions obtained with the new method were characterized by lower mass and shorter computation time.
Źródło:
Journal of Theoretical and Applied Mechanics; 2020, 58, 2; 459-468
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interests of 5 axis toolpaths generation for Wire Arc Additive Manufacturing of aluminum alloys
Autorzy:
Hascoët, J.-Y.
Querard, V.
Rauch, M.
Powiązania:
https://bibliotekanauki.pl/articles/99951.pdf
Data publikacji:
2017
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
additive manufacturing
5 axis manufacturing
WAAM
Opis:
Additive Manufacturing (AM) for metal part can be divided into two different types: The powder technology and the wire technology. Usually, powder is adapted for fine components and small parts whereas wire is used for structural components and large scale part. One of the main benefits of AM is to simplify assemblies by reducing the number of components and to provide a large freedom of design. A standard AM system consists of a combination of three blocks: a motion system, a heat source and a feedstock. For Wire Arc Additive Manufacturing (WAAM), the heat source is a welding generator and the feedstock is a wire. The motion system generally used is a 6 axis robot or a CNC machine. This paper aims to propose a methodology to generate 5 axis toolpaths for WAAM and highlight the main parameters which selection is a key issue to resolve. The goal is to compare 3 axis and 5 axis toolpaths on part accuracy, depending the clearance angle of the part.
Źródło:
Journal of Machine Engineering; 2017, 17, 3; 51-65
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rapid Prototyping: Technologies, Materials and Advances
Autorzy:
Dudek, P.
Rapacz-Kmita, A.
Powiązania:
https://bibliotekanauki.pl/articles/355282.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
rapid prototyping
additive manufacturing
composites
Opis:
In the context of product development, the term rapid prototyping (RP) is widely used to describe technologies which create physical prototypes directly from digital data. Recently, this technology has become one of the fastest-growing methods of manufacturing parts. The paper provides brief notes on the creation of composites using RP methods, such as stereolithography, selective laser sintering or melting, laminated object modelling, fused deposition modelling or three-dimensional printing. The emphasis of this work is on the methodology of composite fabrication and the variety of materials used in these technologies.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 2A; 891-896
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of different composite mixtures (PLA/HA) manufactured with additive laser technology on the ability of S. aureus and P. aeruginosa to form biofilms
Autorzy:
Woźna, A. E.
Junka, A. F.
Szymczyk, A. E.
Powiązania:
https://bibliotekanauki.pl/articles/306425.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
biomateriały
biofilm
biopolimery
bioceramika
biomaterials
prototype additive manufacturing biopolymers
bioceramic
prototype additive manufacturing
Opis:
Staphylococcus aureus (Gram-positive coccus) and Pseudomonas aeruginosa (Gram-negative bacterium) are the leading etiologic agents of biofilm-related, life-threatening infections in patients after orthopaedic implantations. The aim of the present paper is to estimate the ability of these two bacterial strains to form a biofilm on bioresorbable composites manufactured from polylactide (PLA) and hydroxyapatite (HA) with the use of Selective Laser Sintering (SLS) method. Methods: Microbiological tests were conducted on two variants of a solid specimen made with additive laser technology. Samples with different content of hydroxyapatite were made, with appropriate manufacturing parameters to ensure stability of both composite ingredients. The geometry of samples was obtained by technical computed tomography. Microbiological tests determined the number of bacterial cells after incubation. Results: The results indicate significantly decreased ability of S. aureus and P. aeruginosa to form biofilms on the surface of materials with higher content of hydroxyapatite ceramics. Conclusions: The data may be useful for future applications of SLS technology in the production of bioresorbable PLA/HA medical implants
Źródło:
Acta of Bioengineering and Biomechanics; 2018, 20, 3; 101-106
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Review of methods of designing and additive manufacturing of gears
Analiza metod projektowania oraz wytwarzania kół zębatych z wykorzystaniem technologii przyrostowych
Autorzy:
Łuszczek, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/2097732.pdf
Data publikacji:
2021
Wydawca:
Wojskowa Akademia Techniczna im. Jarosława Dąbrowskiego
Tematy:
mechanical engineering
manufacturing technologies
additive manufacturing
gears
Opis:
Additive manufacturing (AM) technology is one of the main components of the fourth industrial revolution known as Industry 4.0. Over the last decades, increase in the dynamics of the development of this technology manifests itself in the form of a wide spectrum of implementations of the methods in the production processes of many elements. This paper presents the latest achievements in the production of gears where the additive technologies have been applied with the use of polymers and metallic materials. The most frequently used methods in this field were indicated, as well as problems related to geometric accuracy or fatigue life of elements manufactured with the use of the methods mentioned. In addition, there were defined future directions of gear design, the implementation of which was possible thanks to the use of aM as well as the scope of research that should be undertaken in this area in the future.
Technologia wytwarzania przyrostowego jest jednym z głównych składowych czwartej rewolucji przemysłowej określanej mianem Przemysł 4.0. W ciągu ostatnich kilkunastu lat, dynamiczny rozwój tej technologii przejawia się w formie szerokiego spektrum wdrożeń poszczególnych technik w procesy produkcyjne wielu części maszyn. W pracy przedstawiono ostatnie osiągnięcia z zakresu wytwarzania kół zębatych przy użyciu technik addytywnych z wykorzystaniem polimerów, jak i materiałów metalicznych. Wskazano techniki, najczęściej wykorzystywane w tym zakresie, a także problemy związane z dokładnością geometryczną, czy trwałością zmęczeniową elementów wytwarzanych z ich wykorzystaniem. Ponadto, określono przyszłe kierunki projektowania kół zębatych, których implementacja była możliwa dzięki wykorzystaniu AM, a także zakres badań, który w przyszłości powinien zostać podjęty w kolejnych pracach naukowych.
Źródło:
Biuletyn Wojskowej Akademii Technicznej; 2021, 70, 2; 15--34
1234-5865
Pojawia się w:
Biuletyn Wojskowej Akademii Technicznej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prototyping of individual ankle orthosis using additive manufacturing technologies
Autorzy:
Wierzbicka, N.
Górski, F.
Wichniarek, R.
Kuczko, W.
Powiązania:
https://bibliotekanauki.pl/articles/102907.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
ankle orthosis
additive manufacturing
reverse engineering
Opis:
The paper presents design and manufacturing process of an individualized ankle orthosis using additive manufacturing technologies and reverse engineering. Conventional processes of manufacturing of orthoses are expensive and time consuming Thus, an alternative method was proposed. The patient’s leg was 3D scanned and the orthosis was designed using a CAD system. It was then manufactured using the Fused Deposition Modelling technology, assembled and fully tested. Positive results were obtained.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 3; 283-288
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of the shape accuracy of parts fabricated by means of FLM process using FEM simulations
Autorzy:
Möhring, H.-Christian
Stehle, Thomas
Maucher, Clemens
Becker, Dina
Braun, Steffen
Powiązania:
https://bibliotekanauki.pl/articles/99674.pdf
Data publikacji:
2019
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
additive manufacturing
FLM-simulation
shape accuracy
Opis:
The prediction of component properties from the Additive manufacturing (AM) process poses a challenge. Therefore, this paper presents the development of a novel machine data (G-Code) based procedure as well as its programming implementation of a process simulation in ANSYS Mechanical for the fused layer modelling (FLM) process. For this purpose, an investigation of additively produced components with varying parameters made of polylactic acid (PLA) is carried out and simulated by means of the developed method. Application of the developed method makes it possible to predict the thermally induced distortion of PLA-Parts based on the machine data from the FLM process before production.
Źródło:
Journal of Machine Engineering; 2019, 19, 1; 114-127
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of the support structure on the bandsawing process when separating lpbf components from the building platform
Autorzy:
Moehring, Hans-Christian
Becker, Dina
Maucher, Clemens
Eisseler, Rocco
Ringger, Jonas
Powiązania:
https://bibliotekanauki.pl/articles/2142352.pdf
Data publikacji:
2022
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
additive manufacturing
LPBF process
cutting process
Opis:
The method of laser powder bed fusion (LPBF) is an additive manufacturing process and allows great freedom of component geometry due to the layer-by-layer structure. The LPBF components are printed on a substrate plate and must be separated from the plate afterwards. Support structures are used to attach LPBF components to the substrate plate and to sustain overhanging parts. The cutting of the components is mainly carried out by means of a sawing process using the support structure. The forces occurring during this process are very challenging because the component has to be cut off without damage or deformation. The present study investigates and discusses the resultant forces and vibrations during the sawing of LPBF components made of titanium alloy Ti6Al4V using two different support structures. The components were arranged on the substrate plate at angles of 0°, 5°, 10°, 15°, 45° and 90° to the direction of primary motion.
Źródło:
Journal of Machine Engineering; 2022, 22, 3; 19--30
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Process of Manufacturing Transparent Models of Anatomical Structures
Autorzy:
Wojnarowska, Wiktoria
Nieroda, Maciej
Gładysz, Ewelina
Miechowicz, Sławomir
Kudasik, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/176131.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
3D printing
medical applications
additive manufacturing
Opis:
In recent years, a rapid increase in the use of three-dimensional (3D) printing technologies in medicine, especially in the manufacturing of the diagnostic models, can be observed. In some cases, there is a need to fabricate transparent models that allow visualization of internal structures of the object. Unfortunately, techniques used to manufacture such models are often very expensive and time-consuming. The above-mentioned issues were the motivation for developing a new method of fabrication transparent models for visualization of internal structures for planning surgical treatments. This paper presents the process of making transparent models using the newly developed method – the stacked layers method. In order to compare this new method and one of the most common 3D printing technologies – fused deposition modeling (FDM) – the models for two medical cases using both of these methods were fabricated. As a result of this work, it can be concluded that the stacked layers method provides faster and cheaper way of making transparent medical models. The main features of fabrication process that have a huge impact on quality of the models made by new method were pointed. The results of this study suggest that models fabricated with the use of this method can be useful as a diagnostic tool in medical applications for planning surgical treatments.
Źródło:
Advances in Manufacturing Science and Technology; 2020, 44, 2; 62-66
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of additively manufactured polymer composite prototypes in foundry
Autorzy:
Kuczko, W.
Wichniarek, R.
Górski, F.
Buń, P.
Zawadzki, P.
Powiązania:
https://bibliotekanauki.pl/articles/957963.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
additive manufacturing
Fused Deposition Modelling
foundry tooling
Opis:
The paper presents a method, developed by the authors, for manufacturing polymer composites with the matrix manufactured in a layered manner (via 3D printing – Fused Deposition Modeling) out of a thermoplastic material. As an example of practical application of this method, functional prototypes are presented, which were used as elements of foundry tooling – patterns for sand molding. In case of manufacturing prototype castings or short series of products, foundries usually cooperate with modeling studios, which produce patterns by conventional, subtractive manufacturing technologies. If patterns have complex shapes, this results in high manufacturing costs and significantly longer time of tooling preparation. The method proposed by the authors allows manufacturing functional prototypes in a short time thanks to utilizing capabilities of additive manufacturing (3D printing) technology. Thanks to using two types of materials simultaneously (ABS combined with chemically hardened resins), the produced prototypes are capable of carrying increased loads. Moreover, the method developed by the authors is characterized by manufacturing costs lower than in the basic technology of Fused Deposition Modeling. During the presented studies, the pattern was produced as a polymer composite and it was used to prepare a mold and a set of metal castings.
Źródło:
Advances in Science and Technology. Research Journal; 2015, 9, 26; 20-27
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mechanical properties of parts of medical components produced using additive manufacturing technologies
Autorzy:
Górski, F.
Wichniarek, R.
Kuczko, W.
Burdzińska, M.
Jankowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/102279.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
additive manufacturing
slings
mechanical properties
medical devices
Opis:
The paper presents results of tests conducted on the elements of medical devices - slings used in medical lifts - manufactured using additive technologies. The project assumed to produce 100 samples of clips with varying design, material and orientation parameter. Samples were manufactured using FDM and SLA processes and then tested for mechanical strength, load transmission and functionality, using certified equipment. The paper shows full methodology and the obtained test results.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 2; 166-171
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lightweight plastic gear body using gyroid structure for additive manufacturing
Autorzy:
Nguyen, Loc Huu
Nguyen, Khoi Thanh
Powiązania:
https://bibliotekanauki.pl/articles/2171773.pdf
Data publikacji:
2022
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
plastic
spur gear lattice
gyroid
additive manufacturing
Opis:
Nowadays, plastic gears are more commonly used. The Triply Periodic Minimal Surfaces (TPMS) structure can perfect the design to reduce weight but still achieve the desired workability criteria. It can also be adjusted more easily and scientifically than the empirical structure optimization based on experience. Currently, the fabrication of gears with complex internal structures such as TPMS is possible thanks to 3D printing technology. This study investigates the mechanical properties of a TPMS structure when applied to Polyetheretherketone (PEEK) plastic gears. The research content includes displacement, deformation, and Von-mises stress to evaluate the stiffness and strength of gears. The structure used to optimize the gear mass is the Gyroid structure, developed in the cylindrical cell map and studied in the paper. The goal of the research is to apply the Gyroid structure to optimize mass while still ensuring gear performance. This study not only offers new insight into the importance of the control variables for TPMS structures but also provides a mass lean process for gear designers. It uses experimental design methods to choose a suitable topology structure, and the final research result is a regression equation, which clearly shows the close relationship between the volume reduction and displacement with the specified control variables of the unit cell. From there, it is possible to determine the proper amount of material reduction while ensuring the working ability of the gear transmission.
Źródło:
Journal of Machine Engineering; 2022, 22, 4; 21--42
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel slicing strategy for continuous printing with a helix 3D printer
Autorzy:
Neel, Tugdual Le
Mesto, Tarek
Hascoet, Jean-Yves
Powiązania:
https://bibliotekanauki.pl/articles/2142355.pdf
Data publikacji:
2022
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
additive manufacturing
slicing
Helix 3D printer
Opis:
Additive manufacturing is an essential solution in the production of parts. Model slicing is an important step of the 3D printing process. The slicing of the layers is the core part of the additive manufacturing because it transforms the 3D model to a 2D profile layer for the printer to manufacture. A novel machine architecture deposits with a helical path. The helical architecture provides a continuous rotation that allows printing continuously without any interruption. Therefore there are no more starting and ending point at each layer. This paper proposes a slicing method compatible with this type of machine. Continuous printing is made as a function of z-level, so at each angle of rotation, the level of z will be incremented. Finally, these disks can be combined as one image to be sent to the ink-jet as a continuous printing. To illustrate this novel slicing methodology a model is sliced.
Źródło:
Journal of Machine Engineering; 2022, 22, 3; 31--43
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of LPBF parameters and strategies on fine machining of pre-built bores
Autorzy:
Teich, Heiko
Maucher, Clemens
Möhring, Hans-Christian
Powiązania:
https://bibliotekanauki.pl/articles/1429104.pdf
Data publikacji:
2021
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
additive manufacturing
LPBF process
post-processing
reaming
Opis:
Additive manufacturing changes the classical possibilities of production. However, post-processing is usually unavoidable for these components to achieve functional performance. To obtain an optimum product, knowledge of the characteristics of the additive manufactured part and the machining mechanisms depending on these characteristics is required. In this paper, the influence and the interaction of the laser powder bed fusion process parameters on the subtractive post-processing are shown. The effects of the parameters on the geometry of bores are examined and subsequently the precision machinability is analysed using reaming. In addition, a process simulation is carried out to correlate the simulated deformation to the required machining allowance for subsequent reaming. The aim of this investigation is to examine the capabilities of the laser powder bed fusion process to produce bores at angles of 90° (vertical), 60° and 45° that can be machined directly with a reaming tool without the need for drilling.
Źródło:
Journal of Machine Engineering; 2021, 21, 2; 91-101
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recent Trends in Metal Forming: From Process Simulation and Microstructure Control In Classical Forming Processes to Hybrid Combinations Between Forming and Additive Manufacturing
Autorzy:
Bambach, M.
Powiązania:
https://bibliotekanauki.pl/articles/99829.pdf
Data publikacji:
2016
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
metal forming
additive manufacturing
microstructure model
recrystallization
Opis:
This paper describes some recent trends in metal forming such as isothermal forging of titanium aluminides and process combinations between metal forming and additive manufacturing. These trends rely on accurate process and material models for process design. Process and material models must hence be able to track the microstructure evolution in complex materials such as titanium aluminides as well as predict the microstructure evolution along process histories with multiple deformation and/or heat input steps. In models for such processes, JMAK-type kinetics for and phase transformation are still common. For processes involving deformation and heat, the accuracy, consistency and limits of JMAK-type models are discussed. It is shown that the consistency of DRX models as well as the stability of model predictions in multi-stage processes require further attention.
Źródło:
Journal of Machine Engineering; 2016, 16, 2; 5-17
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the suitability of a fused filament fabricated tool for incremental sheet metal forming
Autorzy:
Weise, Dieter
Langner, Christian
Pierer, Alexander
Kraeusel, Verena
Petru, Jana
Koziorek, Jiri
Prauzek, Michal
Powiązania:
https://bibliotekanauki.pl/articles/29520057.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
incremental sheet forming
rapid tooling
additive manufacturing
Opis:
Incremental sheet forming (ISF) is a flexible manufacturing process for sheet metal parts in small to medium quantities. Successive movements of a stylus create the geometry of the sheet metal part. ISF can be performed with or without a counter tool. By using counter tools, the geometry deviation of the formed sheet metal part can be reduced. To achieve the broader application of ISF, counter tools must be cost-effective, fast, and individually producible, even for batch sizes of only one part. In addition to milling, which has been the main method used to date, additive manufacturing (AM) also makes it possible to meet these requirements for flexible counter tool production. To investigate the suitability of AM for the production of counter tools for the ISF and to learn more about the load on the counter tool, a cylindrical counter tool made of polylactic acid (PLA) was produced using the fused filament fabrication (FFF) process. This counter tool was used for the ISF of drawing steel. Based on the force measurement results, a first step towards suitability evaluation of 3D-printed counter tools for ISF was taken, and possibilities, as well as application limits for such counter tools were discussed.
Źródło:
Computer Methods in Materials Science; 2023, 23, 1; 43-49
2720-4081
2720-3948
Pojawia się w:
Computer Methods in Materials Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and convergence analysis of directed energy deposition simulations with hybrid implicit / explicit and implicit solutions
Autorzy:
Buhl, Johannes
Israr, Rameez
Bambach, Markus
Powiązania:
https://bibliotekanauki.pl/articles/99870.pdf
Data publikacji:
2019
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
additive manufacturing
steel
implicit/explicit
thermal cycles
Opis:
Conventional metal manufacturing techniques are suitable for mass production. However, cheaper and faster alternatives are preferred for small batch sizes and individualized components. Directed energy deposition (DED) processes allow depositing metallic material in almost arbitrary shapes. They are characterized by cyclic heat input, hence heating and cooling every point in the workpiece several times. This temperature history leads to distribution of mechanical properties, distortions, residual stresses or even fatigue properties in the part. To avoid experimental trial-and-error optimization, different methods are available to simulate DED processes. Currently, the wire arc additive manufacturing (WAAM) is the most competitive DED process. In this work, a simulation method for the WAAM process is established and validated, which should be capable to calculate global effects (e.g. distortions, residual stresses) of real WAAM-processes with duration of hours and thousands of weld beads. The addition of beads and layers is simulated by the element birth and death technique. The elements are activated according to the movements of the heat source (arc). In this paper, the influence of the time step, the mesh size and the material properties of the inactive elements in hybrid implicit / explicit and fully implicit solutions are evaluated with respect to the computation time and stability. This investigation concludes several recommendations for AM-modelling. For example, a low Young’s modulus (100 N/mm2) for the inactive elements show nearly no influences on the welding simulation, but introduces numerical instabilities in case of multiple welding beads. The Young’s modulus should be increased to 1.000 N/mm2 for small mesh-sizes, small step-sizes and many beads, even when it introduces unwanted stresses.
Źródło:
Journal of Machine Engineering; 2019, 19, 3; 94-107
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface quality research for selective laser melting of Ti-6Al-4V alloy
Autorzy:
Król, M.
Tański, T.
Powiązania:
https://bibliotekanauki.pl/articles/351176.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
additive manufacturing
SLM process
surface quality
roughness
Opis:
One of the innovative technology of producing the components is Selective Laser Melting (SLM) belongs to additive manufacturing techniques. SLM technology has already been successfully applied in the automotive, aerospace and medical industries. Despite progress in material flexibility and mechanical performances, relatively poor surface finish still presents a significant weakness in the SLM process. The scope of the present article is the study the influence of selective laser melting parameters such as laser power, scanning speed, exposure time and hatch spacing through additive manufacturing as well as the orientation of the model corresponding to the laser beam on the surface characteristic of the components made from Ti-6A1-4V alloy. By using optimized process parameters, a low surface roughness can be obtained. In research, the machine for the selective laser melting of metal powders Renishaw AM 125 device was used. Based on experiment plan, 32 models were produced, which were examined to define the surface roughness and thus represent an influence of process parameters and the orientation on the model surface quality. The article discusses the fundamental factors determining the roughness that gives invaluable knowledge to improve the surface quality of SLM parts.
Źródło:
Archives of Metallurgy and Materials; 2016, 61, 3; 1291-1296
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical investigation of production-related characteristics regarding their influence on the fatigue strength of additively manufactured components
Autorzy:
Zeißig, Michaela
Jablonski, Frank
Powiązania:
https://bibliotekanauki.pl/articles/2204622.pdf
Data publikacji:
2023
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
additive manufacturing
fatigue strength
Weibull distribution
FEM
Opis:
In order to further enhance the application of additive manufacturing (AM) processes, such as the laser powder bed fusion (L-PBF) process, reliable material data are required. However, the resulting specimen properties are significantly influenced by the process parameters and may also vary depending on the material used. Therefore, the prediction of the final properties is difficult. In the following, the effect of residual stresses on the fatigue strength of 316L steel, a commonly used steel in AM, is investigated using a Weibull distribution. The underlying residual stress distributions as a result of the building process are approximated for two building directions using finite element (FE) models. These imply significantly different distributions of tensile and compressive residual stresses within the component. Apart from the residual stresses, the impact of the mean stress sensitivity is discussed as this also influences the predicted fatigue strength values.
Źródło:
Acta Mechanica et Automatica; 2023, 17, 2; 288--291
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of additive technology of Fused Deposition Modeling for manufacturing small series of elastic models
Autorzy:
Wichniarek, R.
Górski, F.
Kuczko, W.
Powiązania:
https://bibliotekanauki.pl/articles/118183.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Promocji Wiedzy
Tematy:
Rapid Manufacturing
rapid tooling
additive manufacturing technologies
elastic models
Opis:
The paper presents an application of additive method of Fused Deposition Modeling for manufacturing of small series of elastic models. Additive FDM technology is used to produce a casting mould for multiple use. Process of manufacturing of small series of products consists in casting a two-component silicone rubber degassed using vacuum chamber into a multiple use mould. The paper shows the course of the process and related problems on the example of industrial product – a cylindrical seal. The casting mould was produced out of ABS material using BST 1200 machine, whereas casted elastic models were made out of XTX 45 silicone rubber.
Źródło:
Applied Computer Science; 2014, 10, 2; 20-31
1895-3735
Pojawia się w:
Applied Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prototyping of cosmetic prosthesis of upper limb using additive manufacturing technologies
Autorzy:
Radosh, A.
Kuczko, W.
Wichniarek, R.
Górski, F.
Powiązania:
https://bibliotekanauki.pl/articles/102410.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
upper limb
additive manufacturing
cosmetic prosthesis
medical prototype
Opis:
This paper describes prototyping of an individualized cosmetic arm prosthesis. Aim of the studies was to obtain an anatomically correct, lightweight prosthesis. It was accomplished using additive manufacturing technology of fused deposition modeling. The data was obtained by 3D scanning. An experimental concept of dual extrusion of two different materials was applied – the prosthesis was divided into an elastic shell and a rigid core, manufactured in one process. Obtained results were positive.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 3; 102-108
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Structural Characteristics on the Mechanical Properties of FDM Printed PLA Material
Autorzy:
Szczepanik, Stefan
Nikiel, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/106997.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
additive manufacturing
polymer and plastics
polylactide
mechanical properties
Opis:
The present study reports on the influence of printing process parameters, architecture, raster, infill orientation and filling on the density, macrostructure, and mechanical properties, including impact resistance, of biodegradable polymer parts fabricated in polylactide (PLA) on a desktop printer. It complements and considers phenomenologically the results of recently published similar studies, including the use of recycled filament. In our study, complex mechanical properties for the samples printed at the same time on a Replicator 2 printer were investigated. Three samples were printed for each test. Full mechanical characteristics (tensile, compression and bend strengths and impact resistance) of the printed PLA material are reported. This is the novelty in comparison to other studies, where the samples test were printed individually or in a series for each test. The shape and thickness of the layered macrostructure, the presence of holes inside the layers, the number of shell perimeters and the fill density all influenced the tensile properties of the printed materials. These results show the possibility of printing with a 0.3, i.e. shorter printing time than 0.1, 0.15 and 0.18 mm layer thicknesses also reported, without significant decrease in mechanical properties. It is interesting to note that the compressive strengths, the yield of 70–80 MPa and a UTS 113–120 MPa for the printed material with a fill density of 94–96% are comparable with those of aluminum.
Źródło:
Journal of Casting & Materials Engineering; 2020, 4, 1; 1-8
2543-9901
Pojawia się w:
Journal of Casting & Materials Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Role of Additive Manufacturing in Supply Chain Management
Autorzy:
Patalas-Maliszewska, Justyna
Kowalczewska, Katarzyna
Rehm, Matthias
Powiązania:
https://bibliotekanauki.pl/articles/2201179.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
additive manufacturing
3D printing
supply chain management
Opis:
Nowadays, it is necessary to develop a conceptual framework for analysing the relationship between the implementation of Additive Manufacturing (AM) and Supply Chain Management (SCM). In this context, a gap in the research has been observed in the new approach to designing the importance of AM in SCM. The main contribution of this paper, therefore, is a new framework to formulate the role in adopting AM in SCM. The research methodology is based on detailed literature studies of AM in relation to the SCM process within a manufacturing company, as well on a case study, namely the COWAN GmbH manufacturing company who specialise in producing homewares for motorhome enthusiasts. As highlighted in the state-of-the-art analysis, no work, currently available, supports all the features presented.
Źródło:
Management and Production Engineering Review; 2023, 14, 1; 25--33
2080-8208
2082-1344
Pojawia się w:
Management and Production Engineering Review
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of the Shot Peening on Surface Properties and Tribological Performance of Ti-6Al-4V Alloy Produced by Means of DMLS Technology
Autorzy:
Żebrowski, R.
Walczak, M.
Powiązania:
https://bibliotekanauki.pl/articles/351652.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
additive manufacturing
shot peening
titanium alloys
wear
tribology
Opis:
The purpose of the present paper was to investigate the effect of shot peening on the condition of the surface layer and abrasion resistance of specimens made of Ti-6Al-4V titanium alloy produced by Direct Metal Laser Sintering (DMLS) process. The specimens have been produced by means of EOSINT M280 system dedicated for laser sintering of metal powders and their surfaces have been subjected to the shot peening process under three different working pressures (0.2, 0.3 and 0.4 MPa) and by means of three different media i.e. CrNi steel shot, crushed nut shells and ceramic balls. The specimens have been subjected to profilometric analysis, to SEM examinations, microhardness tests and to tribological tests on ball-on-disc stand in Ringer fluid environment. The general results of all tests indicate to favourable effect of shot peening process on the hardness and tribological performance of titanium alloy.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 1; 377-386
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of multilayer coating of EN AW 6060 – T66 using friction surfacing
Autorzy:
Krall, Stephan
Baumann, Christian
Agiwal, Hemant
Bleicher, Friedrich
Pfefferkorn, Frank
Powiązania:
https://bibliotekanauki.pl/articles/2142351.pdf
Data publikacji:
2022
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
additive manufacturing
friction surfacing
aluminum-silicon alloy
coating
Opis:
The objective of this research is to investigate observable process changes during multi-layer friction surfacing of EN AW 6060 aluminum, whether for repair, remanufacturing, or new part manufacturing. In this study, friction surfacing was performed with a 10-mm-diameter rod of EN AW 6060 aluminum at spindle speeds ranging from 1000 to 7000 rpm to create up to three layers of 40-mm-long deposits on a substrate of the same alloy. The process forces and layer temperatures were observed. Post-process measurement of flash geometry, layer geometry and microhardness were conducted with the motivation to understand the impact of multi-layer depositions on performance and identifying acceptable conditions required to achieve acceptable build quality. The thickness, deposition and joining efficiency of layers in the multilayer configuration remained consistent. Friction surfacing of EN AW 6060 aluminum allowed for high deposition rates of 9 kg/hr, when compared to other metal additive technologies.
Źródło:
Journal of Machine Engineering; 2022, 22, 3; 44--58
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Novel one-degree of freedom helix machine architecture for additive manufacturing
Autorzy:
Neel, Tugdual Le
Hascoet, Jean-Yves
Powiązania:
https://bibliotekanauki.pl/articles/2142359.pdf
Data publikacji:
2022
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
additive manufacturing
machine architecture
Helix 3D printer
Opis:
Additive manufacturing has been relying on conventional machinery architecture. Conventionally, the architecture used is a Cartesian set-up. The X-Y-Z axis move independently to move the tool on the X-Y plan and increment the Z-axis when the layer is finished. The machine architecture in this paper simplifies the design by constraining the machine to have solely one-degree of freedom. One degree of freedom is also known as a helix linkage. If individually controlled tools are placed all along the rotating arm, then this movement allows an opportunity to deposit material in a single sweeping motion. To increase furthermore the output, multiple arms can be added at a fixed angle. Finally, because of the predictive motion, multiple helix machines can be synchronized to create collaboratively a bigger part. This type of manufacturing process has potential applications in binder jetting, material jetting, and selective laser sintering.
Źródło:
Journal of Machine Engineering; 2022, 22, 3; 5--18
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A novel method for additive manufacturing of complex shape curved parts by using variable height layers
Autorzy:
Rauch, Matthieu
Dorado, Jorge Piedra
Hascoet, Jean-Yves
Ruckert, Guillaume
Powiązania:
https://bibliotekanauki.pl/articles/1833771.pdf
Data publikacji:
2021
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
WAAM
additive manufacturing
variable height layer
curved part
Opis:
The Wire Arc Additive Manufacturing process (WAAM) is designed for the manufacture of large metallic parts with no joints, very little waste material and hardly any support. It is gaining its space inside the naval, aeronautics and space industries. However, there are key challenges to be solved in order to increase the performance of the WAAM process. Parts with curved shapes are difficult to manufacture with regular parallel layers without support because of an excessive overhang in certain regions. This paper proposes a methodology that solves this issue, by using incrementally angled layers with variable bead height, which eliminates or decreases the overhang between layers. This solution uses an angled rotary positioner (or other method for moving the part in a controlled way) and controls key parameters like the travel speed, the deposition angle, the available bead height difference, etc. The efficiency of the developed proposal is shown with the manufacture of a large curved steel (316L) piece as a use-case.
Źródło:
Journal of Machine Engineering; 2021, 21, 3; 80--91
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decomposition algorithm for tool path planning for wire-arc additive manufacturing
Autorzy:
Nguyen, L.
Buhl, J.
Bambach, M.
Powiązania:
https://bibliotekanauki.pl/articles/99900.pdf
Data publikacji:
2018
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
additive manufacturing
part decomposition
multi-direction slicing
WAAM
Opis:
Three-axis machines are limited in the production of geometrical features in powder-bed additive manufacturing processes. In case of overhangs, support material has to be added due to the nature of the process, which causes some disadvantages. Robot-based wire-arc additive manufacturing (WAAM) is able to fabricate overhangs without adding support material. Hence, build time, waste of material, and post-processing might be reduced considerably. In order to make full use of multi-axis advantages, slicing strategies are needed. To this end, the CAD (computer-aided design) model of the part to be built is first partitioned into sub-parts, and for each sub-part, an individual build direction is identified. Path planning for these sub-parts by slicing then enables to produce the parts. This study presents a heuristic method to deal with the decomposition of CAD models and build direction identification for sub-entities. The geometric data of two adjacent slices are analyzed to construct centroidal axes. These centroidal axes are used to navigate the slicing and building processes. A case study and experiments are presented to exemplify the algorithm.
Źródło:
Journal of Machine Engineering; 2018, 18, 1; 95-106
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The additive-subtractive process chain – a review
Autorzy:
Moehring, Hans-Christian
Maucher, Clemens
Becker, Dina
Stehle, Thomas
Eisseler, Rocco
Powiązania:
https://bibliotekanauki.pl/articles/2200258.pdf
Data publikacji:
2023
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
additive manufacturing
additive-subtractive process chain
functional properties
material properties
Opis:
In recent years, metal additive manufacturing developed intensively and became a relevant technology in industrial production of highly complex and function integrated parts. However, almost all additively manufactured parts must be post-processed in order to fulfil geometric tolerances, surface quality demands and the desired functional properties. Thus, additive manufacturing actually means the implementation of additive-subtractive process chains. Starting with the most relevant additive processes (powder-based PBF-LB, LMD-p and wire-based WAAM and LMD-w/WLAM), considering intermediate process steps (heat treatment and shot peening) and ending up with post-processing material removal processes (with defined and undefined cutting edges), this paper gives an overview of recent research findings with respect to a comprehensive scientific investigation of influences and interactions within the additive-subtractive process chain. This includes both the macroscopic geometric scale and the microscopic scale of the material structure. Finally, conclusions and future perspectives are derived and discussed.
Źródło:
Journal of Machine Engineering; 2023, 23, 1; 5--35
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of high-performance concretes, ultra highperformance concretes, and additive manufacturing technology in increasing the ballistic protection level of field fortifications
Autorzy:
Wysoczański, Andrzej
Partyka, Jacek
Mackiewicz, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/28124259.pdf
Data publikacji:
2023
Wydawca:
Towarzystwo Wiedzy Obronnej
Tematy:
high-performance concrete
additive manufacturing
fortification
ballistic protection
Opis:
High-Performance Concretes (HPC) and Ultra High-Performance Concretes (UHPC) allow for the production of extremely durable construction elements when compared to those same elements made of C35/45 concrete. Increased compressive- and flexural strength markedly contribute to ballistic resistance reducing the area and depth of the “crater” which results from a potential impact of a projectile or a fragment. Additionally, the presence of dispersed fibres in these mixtures eliminates the need of using reinforcement bars, which, in turn, reduces the time expenditure and labour. The article compares the results of various ballistic tests of elements made of high-performance concrete mixtures to determine the viability of applying such elements in the defence sector. Furthermore, the authors present the possibility of adapting additive technologies for the performance of field fortification tasks by the military, as part of which the HPCs and UHPCs are used as working mixtures. The authors also show the possibility of fabricating construction elements without the use of formworks, as well as printing construction elements directly at the site of future operation of the buildings.
Źródło:
Wiedza Obronna; 2023, 3
0209-0031
2658-0829
Pojawia się w:
Wiedza Obronna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Intelligent pattern recognition of SLM machine energy data
Autorzy:
Uhlmann, E.
Pastl Pontes, R.
Laghmouchi, A.
Hohwieler, E.
Feitscher, R.
Powiązania:
https://bibliotekanauki.pl/articles/99469.pdf
Data publikacji:
2017
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
pattern recognition
data analysis
additive manufacturing
energy data
Opis:
Selective Laser Melting (SLM) is an additive manufacturing process, in which the research has been increasing over the past few years to meet customer-specific requirements. Different parameters from the process and the machine components have been monitored in order to obtain vital information such as productivity of the machine and quality of the manufactured workpiece. The monitoring of parameters related to energy is also realized, but the utilisation of such data is usually performed for determining basic information, for instance, from energy consumption. By applying machine learning algorithms on these data, it is possible to identify not only the steps of the manufacturing process, but also its behaviour patterns. Along with these algorithms, evidences regarding the conditions of components and anomalies can be detected in the acquired data. The results can be used to point out the process errors and component faults and can be adopted to analyse the energy efficiency of the SLM process by comparing energy consumption of one single layer during the manufacturing of different components. Moreover, the state of the manufacturing process and the machine can be determined automatically and applied to predict failures in order to launch appropriate counter measures.
Źródło:
Journal of Machine Engineering; 2017, 17, 2; 65-76
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of processes occurring in the extrusion head used in additive manufacturing technology
Autorzy:
Prusinowski, A.
Kaczyński, R.
Powiązania:
https://bibliotekanauki.pl/articles/387528.pdf
Data publikacji:
2017
Wydawca:
Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Tematy:
additive manufacturing
fused deposition modelling
FEM analysis
RFPC
Opis:
The purpose of this research is unsatisfactory state of knowledge of the abrasive wear of composites with thermoplastic polymer as matrix material and reinforcing material in the form of short and focused carbon fibers that can be used in additive manufacturing technologies. The paper presents a conceptual design of an extrusion head used in Fused Deposition Technology, which allows for the implementation of appropriately stacked fibers at the level of detail production. Finite element simulation was performed to simulate the thermal effect of the system to demonstrate the effect of head cooling on the system. The assumed extrusion temperature of the material was obtained at a uniform nozzle temperature and stable temperature of the entire system. Flow simulation of thermoplastic polymer was carried out in the designed extrusion nozzle. By supplying 0.5 mm wire of 1.75 mm diameter thermoplastic material to the nozzle, the extrusion rate was 0.192 m/s. The proper design of the extrusion head for the intended applications has been demonstrated and the purpose of further research in this field has been confirmed.
Źródło:
Acta Mechanica et Automatica; 2017, 11, 4; 317-321
1898-4088
2300-5319
Pojawia się w:
Acta Mechanica et Automatica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laser Metal Deposition and Wire Arc Additive Manufacturing of Materials: An Overview
Autorzy:
Rumman, R.
Lewis, D. A.
Hascoet, J. Y.
Quinton, J. S.
Powiązania:
https://bibliotekanauki.pl/articles/352724.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
additive manufacturing
laser metal deposition
wire arc
microstructure
Opis:
Additive manufacturing (AM) is a process that joins similar or dissimilar materials into application-oriented objects in a wide range of sizes and shapes. This article presents an overview of two additive manufacturing techniques; namely Laser metal deposition (LMD) and Wire arc additive manufacturing (WAAM). In LMD, metallic powders are contained in one or more chambers, which are then channelled through deposition nozzles. A laser heats the particles to produce metallic beads, which are deposited in layers with the aid of an in-built motion system. In WAAM, a high voltage electric arc functions as the heat source, which helps with ensuring deposition of materials, while materials in wire form are used for the feedstock. This article highlights some of the strengths and challenges that are offered by both processes. As part of the authors’ original research work, Ti-6Al-4V, Stainless steel 316L and Al-12Si were prepared using LMD, while the WAAM technique was used to prepare two Al alloys; Al-5356 and CuAl8Ni2. Microstructural analysis will focus on similarity and differences in grains that are formed in layers. This article will also offer an overall comparison on how these samples compare with other materials that have been prepared using LMD and WAAM.
Źródło:
Archives of Metallurgy and Materials; 2019, 64, 2; 467-473
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selection of material model of chosen photocurable resin for application in finite element analyses
Autorzy:
Miedzińska, Danuta
Powiązania:
https://bibliotekanauki.pl/articles/1835546.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
additive manufacturing
photocurable material
Finite Element Method
constitutive models
Opis:
In the paper, a literature study of a modelling methods of a photocurable materials developed by additive techniques is presented. The main aim was to assess which material model is appropriate for such kinds of matter. The Finite Element Method and the LS Dyna software was assumed as a possible environment for the investigations. The material models that can be apply for photopolymers analysing were described as well as examples of such materials. The conclusions is that the material model selection must be based on the observation of the material behaviour and the possible loading conditions (e.g. strain rate).
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2020, nr 23(4); 323-336
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geometry extraction from GCODE files destined for 3D printers
Autorzy:
Kiński, Wojciech
Sobieski, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/950064.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
GCODE
STL
additive manufacturing
3D printers
reverse engineering
Opis:
The paper presents a method of conversion of GCODE files designed for additive manufacturing in 3D printers to a format which may be conveniently visualized. In the investigations three different 3D models were created: a) shell model (a casing); b) solid model (a gear); c) model with curvilinear elements (a screw). All these models were converted to GCODE files. Next the reverse engineering was applied and GCODE files were converted to points sets. These points represent particular locations of the print head. In the developed algorithm the linear interpolation was added to obtain intermediate points between locations of the print head for longer sections. The final part shows an attempt of applying Poisson Surface Reconstruction in order to obtain the original geometry. The main motivation to develop a new software resulted from the observation that sometimes the original solid model is no longer available, while there is a need to change some geometry details or settings before production stage.
Źródło:
Technical Sciences / University of Warmia and Mazury in Olsztyn; 2020, 23(2); 115-131
1505-4675
2083-4527
Pojawia się w:
Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication of Metal Gas Filter by Material Extrusion Additive Manufacturing Process
Autorzy:
Yi, Yu-Jeong
Lee, Min-Jeong
Yun, Su-Jin
Park, Manho
Kim, Ju-Yong
Lee, Jungwoo
Yun, Jung-Yeul
Powiązania:
https://bibliotekanauki.pl/articles/2174560.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
gas filter
additive manufacturing
stainless steel
porosity
powder size
Opis:
Recently, 3D printing processes have been used to manufacture metal powder filters with manufacturing complex-shape. In this study, metal powder filters of various shapes were manufactured using the metal extrusion additive manufacturing (MEAM) process, which is used to manufacture three-dimensional structures by extruding a filament consisting of a metal powder and a binder. Firstly, filaments were prepared by appropriately mixing SUS316 powder with sizes ranging from 7.5 µm to 50 µm and a binder. These filaments were extruded at temperatures of 100℃ to 160℃ depending on the type of filament being manufactured, to form three types of cylindrical filter. Specimens were sintered in a high vacuum atmosphere furnace at 850℃ to 1050℃ for 1 hour after debinding. The specimens were analyzed for permeability using a capillary flow porometer, porosity was determined by applying Archimedes’ law and microstructure was observed using SEM.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 4; 1517--1520
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geometrical Accuracy of Threaded Elements Manufacture by 3D Printing Process
Autorzy:
Budzik, Grzegorz
Dziubek, Tomasz
Kawalec, Andrzej
Turek, Paweł
Bazan, Anna
Dębski, Mariusz
Józwik, Jerzy
Poliński, Przemysław
Kiełbicki, Mateusz
Kochmański, Łukasz
Oleksy, Mariusz
Cebulski, Józef
Paszkiewicz, Andrzej
Kuric, Ivan
Powiązania:
https://bibliotekanauki.pl/articles/2201896.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
additive manufacturing
surface roughness
computer measurement system
threaded elements
Opis:
Additive processes allow for almost any manufacturing of screw-threaded joint elements. However, this requires knowledge of the geometrical relationships of a threaded itself and the strength of materials from which the screw-threaded joint is made. Thanks to the development of research models and conducting tests related to dimensional accuracy and surface roughness, it was possible to test the models made by MEX process of ABS-M30, PLA, ABS, PETG materials, and PolyJet process from RGD720 polymer material.In the case of measurements carried out on the MarSurf XC20 system, the internal and external thread profile was obtained.Measurements of the surface roughness of the printed models were made using the Taylor Hobson TalyScan 150 profilometer. Based on the obtained surface, following the ISO 25178-2 standard, selected parameters were determined.
Źródło:
Advances in Science and Technology. Research Journal; 2023, 17, 1; 35--45
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Laboratory Diffraction Methods in Characterization of Elements Made By Additive SLM Methods - State of the Art
Autorzy:
Gadalińska, Elżbieta
Pawliszak, Łukasz
Moneta, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/2105183.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
X-ray diffraction
residual stress measurements
additive manufacturing
SLM
Opis:
The greatest challenge of widely developed incremental manufacturing methods today is to obtain, as a result of the manufacturing process, such components that will have acceptable strength properties from the point of view of a given application. These properties are indirectly determined by three key characteristics: the level of surface residual stress, the roughness of the component and its porosity. Currently, the efforts of many research groups are focused on the problem of optimizing the parameters of incremental manufacturing so as to achieve the appropriate level of compressive residual stress, the lowest possible porosity and the lowest possible roughness of parts obtained by 3D methods. It is now recognized that determining the level of these three parameters is potentially possible using experimental X-ray diffraction methods. The use of this type of radiation, admittedly, is only used to characterize the surface layer of elements, but its undoubted advantage is its easy availability and relatively low cost compared to experiments carried out using synchrotron or neutron radiation.
Źródło:
Fatigue of Aircraft Structures; 2021, 13; 72--80
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Additive Manufacturing of WC-Co by Indirect Selective Laser Sintering (SLS) using High Bulk Density Powders
Autorzy:
Gădălean, Rares Vasile
Jucan, Ovidiu-Darius
Chicinaş, Horea
Bâlc, Nicolae
Popa, Catalin O.
Powiązania:
https://bibliotekanauki.pl/articles/2106562.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
additive manufacturing
selective laser sintering
cemented carbide
polyamide 12
Opis:
Research in additive manufacturing of tungsten carbide-cobalt has intensified over the last few years due to the increasing need for products designed using topology optimisation and multiscale structures (lattice). These products result in complex shapes and contain inner structures that are challenging to produce through conventional techniques, thus involving high costs. The present work addresses this problem using a two-step approach to 3D print parts with complex shapes and internal structures by employing indirect selective laser sintering (SLS) and tungsten carbide-cobalt sintering. The paper takes further our research in this field [1] to improve the part density by using high bulk density tungsten carbide-cobalt powders. Mechanically mixing tungsten carbide-cobalt with the sacrificial binder, polyamide 12, results in a homogenous powder successfully used by the selective laser sintering process to produce green parts. By further processing, the green parts through a complete sintering cycle, an average final part density of 11.72 g/cm3 representing more than 80% of the theoretical density is achieved.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 2; 577--585
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of 3d Model Geometry on Dimensional and Shape Characteristics in Additive Manufacturing
Autorzy:
Tagowski, Michał
Powiązania:
https://bibliotekanauki.pl/articles/2106565.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
additive manufacturing
3d printing
3d modelling
CAx
Opis:
Quality of 3d model in simple way translates into quality of final product, obtained from 3d printing. 3d CAx software give possibility to create enormous number of shapes - doesn’t matter solids or surfaces. The question is where is the frontier between quality of 3d model and a value for money of the completed print? Is it always necessary to create as good model as possible? This paper will focus on preparation of 3d models, based on primitives and will show connection between quality of mesh, its size and deviations and quality of obtained samples, in same manufacturing conditions.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 2; 391--396
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The role of die definition in the numerical simulations of two-points incremental forming processes
Autorzy:
Perzynski, Konrad
Pawlikowski, Kacper
Madej, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/29520054.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
two-points incremental forming
finite element method
additive manufacturing
Opis:
The main objective of this work is to investigate the influence of the definition of dies type in the finite element simulation of the two-points incremental forming processes (TPIF). Particular attention is on determining the effect of assigning elastic properties for the 3D printed dies or considering fully rigid on the final results. During the research, three different shapes of dies were analyzed. Simulation results in the form of sheet thickness distributions and measured forces are presented for comparison purposes.
Źródło:
Computer Methods in Materials Science; 2023, 23, 1; 5-12
2720-4081
2720-3948
Pojawia się w:
Computer Methods in Materials Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Additive manufacturing of polyether ether ketone – PEEK parts with surface roughness modification by a laser beam
Autorzy:
Krolikowski, Marcin
Przestacki, Damian
Chwalczuk, Tadeusz
Sobolewska, Ewa
Tomasik, Malgorzata
Powiązania:
https://bibliotekanauki.pl/articles/100003.pdf
Data publikacji:
2020
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
additive manufacturing
PEEK
prosthetic implant
laser beam
surface treatment
Opis:
The physicochemical properties of polyether ether ketone (PEEK) allow to use this material for prosthetic restorations applied in implant prosthetics. So far, such attempts have been made in the technology of milling rough material solids of this polymer, but the surface quality was unsatisfactory. Therefore, the production of these materials by additive manufacturing techniques was proposed and an attempt was made to shape their surface using a laser. The possibilities of the method are determined in the paper and preliminary works related to the product surface shaping are presented. The process of making individual prosthetic restorations from the PEEK material by the additive method together with the technology of laser modification of the geometric structure of the material surface for applications in implant prosthetic treatment of patients is innovative and has not been used so far.
Źródło:
Journal of Machine Engineering; 2020, 20, 3; 117-124
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiscale assessment of additively manufactured free-form surfaces
Autorzy:
Gogolewski, Damian
Powiązania:
https://bibliotekanauki.pl/articles/2203371.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
free-form
wavelet transform
multiscale analysis
surface texture
additive manufacturing
Opis:
The article reviews the results of experimental tests assessing the impact of process parameters of additive manufacturing technologies on the geometric structure of free-form surfaces. The tests covered surfaces manufactured with the Selective Laser Melting additive technology, using titanium-powder-based material (Ti6Al4V) and Selective Laser Sintering from polyamide PA2200. The evaluation of the resulting surfaces was conducted employing modern multiscale analysis, i.e., wavelet transformation. Comparative studies using selected forms of the mother wavelet enabled determining the character of irregularities, size of morphological features and the indications of manufacturing process errors. The tests provide guidelines and allow to better understand the potential in manufacturing elements with complex, irregular shapes.
Źródło:
Metrology and Measurement Systems; 2023, 30, 1; 157--168
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microstructural And Mechanical Properties Of Selective Laser Melted Inconel 718 For Different Specimen Sizes
Autorzy:
Madejski, Bartosz
Malicki, Maciej
Czarnewicz, Sławomir
Gruber, Konrad
Powiązania:
https://bibliotekanauki.pl/articles/2105147.pdf
Data publikacji:
2020
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
additive manufacturing
tensile test
microstructure investigation
IN718
Inconel 718
Opis:
Selective laser melting (SLM) falls into the category of additive manufacturing technologies that are being increasingly used in the aerospace industry. This study presents the results of the examination of the microstructure and mechanical properties of selective laser melted Inconel 718. The tests were carried out for samples of different geometry (thickness, shape). The investigation showed the effect of the specimen’s size and the printing direction on the microstructure and mechanical properties. In the microstructural investigation, light and scanning electron microscopes were used. The microstructure investigation included measurements of the grain size and the carbides’ content. In order to estimate porosity computer tomography was used. Tensile tests were carried out at room temperature. The results showed differences in mechanical and microstructural properties of different size specimens.
Źródło:
Fatigue of Aircraft Structures; 2020, 12; 15--26
2081-7738
2300-7591
Pojawia się w:
Fatigue of Aircraft Structures
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A generic method to realize long fibers filled and large polymer parts in additive manufacturing
Autorzy:
Hascoët, Jean-Yves
Authelin, Olivier
Rauch, Matthieu
Powiązania:
https://bibliotekanauki.pl/articles/99691.pdf
Data publikacji:
2020
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
robotized additive manufacturing
long fiber
filled polymers
fused filament fabrication
Opis:
A general manufacturing methodology for long fibers filled and large polymer (LFFLP) parts will be proposed, which constitutes the major scientific contribution of the document. The input, output, control and analysis data at each step of the methodology will be specified. Experiments realized in the laboratory of Ecole Centrale de Nantes will demonstrate the relevance and effectiveness of this method applied to a 6-axis robot and the FFF process by showcasing two light and resistant lattice structures. The latter also highlight the capacity of 6-axis robots for orienting the deposition head in order to generate complex trajectories. Finally, perspectives and future research about this subject will be discussed such as the need to develop in-depth analyses of the manufacturing methodology. The possibility of using continuous fibres composites as material feedstock for robotized large dimensions FFF will also be covered.
Źródło:
Journal of Machine Engineering; 2020, 20, 1; 107-116
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on the Effect of in Situ Surface Treatments of Medical Microfluidic Systems Obtained Through Additive Manufacturing
Autorzy:
Csapai, Alexandra
Țoc, Dan-Alexandru
Pașcalău, Violeta
Toșa, Victor
Opruța, Dan
Popa, Florin
Popa, Catalin
Powiązania:
https://bibliotekanauki.pl/articles/2134105.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
additive manufacturing
microfluidic systems
surface roughness
biofilm growth
laminar flow
Opis:
This paper presents a comparative study on the effects of the in-situ surface modifications performed on “H” type microfluidic systems obtained via additive manufacturing. The microsystem was printed using a polylactic acid filament on an Ender-5 Pro printer. The surface modification of the main channel was done using chloroform by two different methods: vapor smoothing and flushing. The obtained surface roughness was studied using an optical microscope and the ImageJ software, as well as scanning electron microscopy. The effect of the channel surface treatment upon the characteristics of the fluid flow was assessed. The microfluidic systems were used for the dynamic study of biofilm growth of Candida albicans (ATCC 10231). The influence of the surface roughness of the main channel on the formation and growth of the biofilm was studied using quantitative methods, scanning electron microscopy imaging as well as optical coherence tomography.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 3; 1071--1078
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Identification of the heat source and thermal material model parameters for the laser engineered net shaping
Autorzy:
Hajder, Lucyna
Zhang, Tao
Nguyen, Vu
Powiązania:
https://bibliotekanauki.pl/articles/29520077.pdf
Data publikacji:
2022
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
additive manufacturing
finite element analysis
heat source model
thermal analysis
Opis:
The research’s primary goal is to identify the heat source and thermal material model parameters for the numerical simulation of the laser engineered net shaping (LENS). Inconel 718 was selected as a case study for the current investigation. The LENS process’s numerical model was developed within commercial finite element software and was used as a direct problem model during the parameter identification stage. Experimental data were obtained based on a rectangular-shaped sample with thermocouples located under the based material surface. The recorded thermal profiles were used to establish a goal function for the parameter identification stage. As a result, parameters describing the melt pool geometry during the additive manufacturing, as well as thermal coefficients describing interactions between the sample material and surrounding/base material, were determined.
Źródło:
Computer Methods in Materials Science; 2022, 22, 1; 43-54
2720-4081
2720-3948
Pojawia się w:
Computer Methods in Materials Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of the Construction of City Buses in Terms of Reducing the Curb Weight of the Vehicle
Autorzy:
Caban, Jacek
Seńko, Jarosław
Nowak, Radosław
Rumianek, Przemysław
Podkowski, Krzysztof
Wolska, Natalia
Powiązania:
https://bibliotekanauki.pl/articles/24200880.pdf
Data publikacji:
2023
Wydawca:
Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
Tematy:
additive manufacturing
autobus
centre of gravity
construction materials
vehicle
structure
Opis:
Modern city buses are made of various construction materials and the share of material groups has changed over the decades. By replacing heavy materials for structural elements or bus components with their lighter counterparts, the kerb weight of the bus can be reduced by up to several hundred kilograms. This article presents the issues of the development of city bus design in terms of passenger space comfort and bus structure in the context of reducing the vehicle's own weight since the 1970s. The main changes in vehicle design allowing for reducing the weight of structural elements of bodies and chassis as well as the main assemblies in city buses are presented as well as research on body types in terms of aerodynamics, safety and travel comfort. It has been shown that reducing the weight of the bus does not negatively affect its load capacity and the new bus designs are equipped with safety and comfort systems, including ABS (Anti-lock Braking System), ASR (Automatic Stability Regulation), ESP (Electronic Stability Program) and air conditioning in the passenger space. Thanks to modern light construction materials, we gain the opportunity to improve safety and comfort without losing the transport capabilities developed as a result of the development of city buses over the years.
Źródło:
Archiwum Motoryzacji; 2023, 102, 4; 91--104
1234-754X
2084-476X
Pojawia się w:
Archiwum Motoryzacji
Dostawca treści:
Biblioteka Nauki
Artykuł

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