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1
Leonelli, Mhervin. "Analisi della correlazione tra i parametri di processo e le prestazioni dei materiali polimerici ottenuti tramite fused deposition modeling." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8561/.
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Questa tesi si propone di realizzare una caratterizzazione del polimero ABS ottenuto con tecnica Fused Deposition Modeling in modo da ottenere dati utili alla realizzazione di parti strutturali tramite rapid prototyping.
2
Sysel, Karel. "Návrh a zefektivnění parametrů FDM tisku." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230120.
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The essence of the work is to test the possibilities specific type of simple 3D printing device, which has recently been getting more and more into the awareness of professionals and the general public. First, the work is focused on presentation 3D printing technology and current professional equipment, in the second part are experimentally evaluated possibilities of of a simple kind of 3D printers followed by assessment of the applicability of the device in engineering practice.
3
Wu, Yingxiang. "Rapid Prototyping Job Scheduling Optimization." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/35845.
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Today's commercial rapid prototyping systems (i.e., solid freeform fabrication, layered manufacturing) rely on human intervention to load and unload build jobs. Hence, jobs are processed subject to both the machine's and the operator's schedules. In particular, first-in-first-out (FIFO) queuing of such systems will result in machine idle time whenever a build job has been completed and an operator is not available to unload that build job and start up the next one. These machine idle times can significantly affect the system throughput, and, hence, the effective cost rate.
This thesis addresses this problem by rearranging the job queue to minimizing the machine idle time, subject to the machine's and operator's schedules. This is achieved by employing a general branch-and-bound search method, that, for efficiency, reduces the search space by identifying contiguous sequences and avoiding reshuffling of those sequences during the branching procedure. The effectiveness of this job scheduling optimization has been demonstrated using a sequence of 30 jobs extracted from the usage log for the FDM 1600 rapid prototyping system in the Department of Mechanical Engineering at Virginia Tech.Master of Science
4
Brockmeier, Oivind. "Automated Loading and Unloading of the Stratasys FDM 1600 Rapid Prototyping System." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/31533.
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Rapid prototyping systems have advanced significantly with respect to material capabilities, fabrication speed, and surface quality. However, build jobs are still manually activated one at a time. The result is non-productive machine time whenever an operator is not at hand to make a job changeover. A low-cost auxiliary system, named Continuous Layered Manufacturing (CLM), has been developed to automatically load and unload the FDM 1600 rapid prototyping system (Stratasys, Inc.). The modifications made to the FDM 1600 system are minimal. The door to the FDM 1600 build chamber is removed, and the .SML build files that are used to drive the FDM 1600 are modified at both ends to facilitate synchronized operation between the two systems. The CLM system is capable of running three consecutive build jobs without operator intervention. As long as an operator removes finished build jobs, and adds new build trays before at most every three build jobs, the FDM can operate near indefinitely. The impact of the CLM system on the productivity of the FDM 1600 rapid prototyping system is demonstrated by the expected reduction from the customary eight weeks down to a future three and one-half weeks required to complete the typical forty build jobs during a semester in the course ME 4644 Introduction to Rapid Prototyping at Virginia Tech.Master of Science
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Kosour, Vojtěch. "Technologie rychlého prototypování za použití metody FDM a současně technologie vytavitelného modelu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228152.
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An overview of the development of the Investment Casting market and Rapid Prototyping equipment is given in the introductory part of this diploma thesis. Basic methods of rapid prototyping and the FDM method are futher described in detail. The FDM method is consequently used in the practical part of this work for the preparation of the silicon mould. The largest part deals with the issue of the simulation of pouring process of wax into the silicon mould. A characteristics of the casting wax is made; the parametres, which are inserted into the simulation software ProCAST and the possibilities of their measurement are described. The process of the simulation of the mould filling and its validation with the real filling process are described in detail.
6
Lux, Martin. "Experimentální biomechanická protéza ruky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230345.
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This masters thesis deals with experimental biomechanical hand prosthesis designing and its realization in shape of prototype. Hand prosthesis sizing corresponds with adult man hand. Prosthesis functionality is selected with respect to search analysis results, to provide sufficient options to grip different objects. Hand design, including technical documentation, is completely made in Autodesk Inventor 2012. Main parts of prototype are made with using rapid - prototyping technologies. Used materials for parts made by this way are ABS plastics and plaster powder. Firgelli linear actuators (product line L) are used as drive for electrical controlled fingers. Prototype control is realized by PCI card and program, which has been written in LabView.
7
Břoušek, Lukáš. "Tepelné úpravy povrchu po 3D FDM tisku." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318156.
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The topic of diploma thesis are surface heat treatments after 3D print by method Fused Deposition Modeling. In the introduction is located recherche of the given issue. Further, we describe the construction and process of the 3D printer construction, on which will be printed samples for experiments in the next part of the thesis. The aim is to determine the behavior and changes of surface structures of heat-affected samples from different materials. Furthermore, the suitability of the used methods and the possibility of their use in practice.
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Knapil, Josef. "Stavba a aplikace 3D FDM tiskárny typu deltabot." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232111.
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The thesis describes design and aplication of 3D FDM printer type of delta. The first part describes methods of rapid prototyping. The second part describes 3D printers type of delta. The third part deals with construction and calibration of delta printer. In the fourth part are made suitable modifications to the design of the printer, to improve the quality of printing, which is then applied on a sample product. The final section is devoted to technical and economic evaluation.
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Martins, José Roberto. ""Manufatura rápida - avaliação das tecnologias de impressão 3D e FDM na fabricação de moldes rápidos"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/18/18146/tde-18072006-101938/.
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Este trabalho avaliou a aplicação das tecnologias de prototipagem rápida por Impressão 3D e FDM (Fused Deposition Modeling) na produção de moldes rápidos. Esta avaliação foi feita com base nas qualidades das peças obtidas por vazamento nos moldes produzidos, bem como nas limitações encontradas em suas utilizações. Foram estabelecidas as principais diferenças do ponto de vista de qualidade, custos, tempos gastos e praticidade. Foram construídos moldes para peças que contemplando vários graus de dificuldades. Para cada ferramental foram obtidos lotes de peças, através dos quais foram analisadas e comparadas as qualidades dos protótipos.This work evaluated the application of the Rapid Prototyping technologies 3D printer and FDM (Fused Deposition Modeling) in the rapid manufacturing of molds. This evaluation is based on the quality of the parts molded, as well as in the limitations found in the molds applications. As result the main differences related to quality, and usability was established. The molds produced parts with different degrees of geometric difficulties. For each mold, a few prototypes were produced and their qualities compared.
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Smrčka, Václav. "Technologie rychlého prototypování za použití metody FDM a současně technologie vytavitelného modelu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228153.
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Determining accuracy of wax patterns is an important in wide implementing rapid prototyping methods in investment casting. This experiment is comparing wax pattern accuracy produced in classical metal die and silicone mould. It has been found out, that wax patterns produced by the silicone mould are ounly about one or two accuracy steps worse then wax patterns produced by classical metal die.
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Pivoda, Miroslav. "Návrh technologie výroby formy na odlévání dílu v malosériové výrobě." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229356.
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The aim of thesis is to describe the basic methods called Rapid Prototyping in theory and using one of them to create master model. Master model will be used to create silicone mould where a limited series of wax models will be by means of vacuum casting chamber. They will also be used to make ceramic form in which the final pad will be cast from freely accessible materials. After processing it the suitability of the proposed technologies for the production of the part in question will be assessed.
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Tyberg, Justin. "Local Adaptive Slicing for Layered Manufacturing." Thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/36547.
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Existing layered manufacturing systems fabricate parts using
a constant build layer thickness. Hence, operators must
compromise between rapid production with large surface
inaccuracies, and slow production with high precision, by
choosing between thick and thin build layers, respectively.
Adaptive layered manufacturing methods alleviate this
decision by automatically adjusting the build layer
thickness to accommodate surface geometry, thereby
potentially enabling part fabrication in significantly less
time. Unfortunately, conventional adaptive layered
manufacturing techniques are often unable to realize this
potential when transitioning from the laboratory to an
industrial setting. The problem is that they apply the
variable build layer thickness uniformly across each
horizontal build plane, applying the same build layer
thickness to all parts and part features across that plane
even though they have different build layer thickness needs.
When this happens, the advantage of using adaptive build
layer thicknesses is lost. This thesis demonstrates how
to minimize fabrication times when implementing adaptive
layered manufacturing. Specifically, it presents a new
method in which each part or individual part feature is
assigned a distinct, independent build layer thickness
according to its particular surface geometry. Additionally,
this thesis presents a calibration procedure for the Fused
Deposition Modeler (FDM) rapid prototyping system that
enables accurate, adaptively sliced parts to be physically
realizable. Experimental software has been developed and
sample parts have been fabricated to demonstrate both
aspects of this work.Master of Science
13
Klus, Jakub. "Nová koncepce údržby a provozu výrobních technologií." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-449712.
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This diploma thesis deals with a new concept of maintenance and operation of production technologies, where spare parts are manufactured using rapid prototyping methods. The options are compared with currently used methods. Furthermore, methodological recommendations are written on how to proceed with the application. The aim of the work is to evaluate the concept and confirm the theoretical assumptions on a case study.
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Eis, Jiří. "Technologie výroby kopie osobního automobilu pomocí digitalizace." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229138.
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This thesis, maked as diploma project at VUT Brno, summarize in teoretical part most used methods, technology of reverse engineering and rapid prototyping, including their using in practice. Experimental part discussed about aplication of this technologies on practical example. Tendency of thesis was creation of digitized model of a car by optical scanner ATOS and photogrammetry system TRITOP, including modifications and processing of get data, which will use to verification of model by FDM technology.
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Ctibor, Jiří. "3D tiskárna." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-242004.
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Master thesis deals with topic about 3D printers, concretely making hardware of control and power electronic for FDM 3D printer. The work could offer an overview about basic 3D printing technologies after reading. More information could be read about FDM technology, which is used in our printer, also with description of all important components. The furthest is discussed about electronic drives. If reader is interested in this topic, part of this thesis is schematic design of control electronics, which can be used to build own boards. Design of printed circuit boards is not present in attachment and can be obtained by contacting the author. For own control is used one of the open source control software. Mechanical problems and also mechanical design is done in parallel thesis by other student of Faculty of mechanical engineering.
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Rodrigo, Miranda. "A Comparative Study of Strength and Stiffness of Thin-Walled Specimens Fabricated By FDM and 3D Printing Technologies." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3349.
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Rapid Prototyped part failure constitutes a major issue for both RP providers and customers. When parts fail the reputation of the vendor is heavily deteriorated, customer dissatisfaction increase and replacement of the broken parts is often necessary to avoid the loss of future business. Product design teams often run into situations where Rapid Prototyped parts are not able to withstand shipping and handling and delivered broken or while demonstrating and examining the parts. When done in the face of customers this builds a perception of poor quality and lack of aptitude on the design group as well as the RP processes. The rapid advance of the RP industry and technology has led users to employ RP parts for structural applications where the need to understand in great detail and accuracy the mechanical behavior of the product and its individual components is greater than ever. Models built on Rapid Prototyping (RP) equipment are most often made from polymers which frequently have mechanical properties that are inferior to those manufactured by traditional methods such as thermoforming or injection molding. Not only are the mechanical properties of RP models typically low, they are usually, at least in thin sections, directly dependent on the section or wall thickness of the models. This dependence of strength on wall thickness makes it difficult to predict a proper wall thickness for RP models, even when nominal values of material strength are known. The purpose of this work is to present and compare measured values of tensile strength and stiffness as a function of wall thickness for three RP processes and materials. These properties will assist designers estimating adequate minimum wall thicknesses for models built by the three processes. The three RP technologies included in the scope of this research are: Z Corporation (powder with polymer binder layup), Fuse Deposition Modeling and PolyJet Layup (Objet). The findings of this study establish that tensile strength and stiffness values are dependent upon wall thickness, building orientation and direction of the applied force of specimens created with the methods in consideration. It was also determined that the correlation between thickness and strength for all processes is non-linear. Due to these results a single tensile strength and modulus value for each material and all wall thicknesses do not accurately represent their behavior. However, these results will allow a designer to understand the relationship between the wall thickness and using the data provided in this work be able to model and then fabricate adequate 3D prototypes.
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Žlebek, Michal. "Konstrukce 3D tiskárny pro materiály s vyšší pevností." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231780.
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Thesis deals with FDM 3D printing method and testing capabilities of optimum printing conditions for different materials. The aim of this work is to design and manufacture of experimental device that enables printing to investigate these conditions. A device designed in this work was named UK3DP and allows dual color object printing with maximum dimensions of the square base of 150 mm and a height of 150 mm. Before printing, the user can set almost all parameters affecting the printing process, including air temperature in heated chamber that is part of it. To verify the functionality several materials are tested, including ABS, PC and PEI. It also describes basic verification of the influence of selected parameters on the print result. Performs tensile tests confirming the influence of ambient temperature during printing on the quality of fiber connections, examines the final quality of the surface for each layer height and compares the resulting deformation of printed objects with other printers. The result of this work is a 3D printer capable of testing printing conditions for both existing and new types of materials with a range of user adjustable parameters.
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Stockham, Corbin H. "Rapid Tooling Carbon Nanotube-Filled Epoxy for Injection Molding Using Additive Manufacturing and Casting Methods." Ohio University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1591803958920497.
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Taufer, Tomáš. "Konstrukce stendu pro dynamické testování protéz dolních končetin." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231767.
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This work describes design and realization of testing device for dynamic tests of foot prosthesis, made by methods of Rapid prototyping. Primary objective of design is to imitate the load on prosthesis during human gait. This task is accomplished by swing motion of prosthesis inside the frame of device during the loading of heel and tiptoe. Loading components can be removed and changed so the device can be used for different measurement like walking on an inclined plane. The result of this work is fully functional device including control program with many options to control the test. The result of test is to decide whether the foot prosthesis withstands the set of cyclic loads. The area of development of prosthesis by additive methods is young for the time being. It stands out especially with different materials, design, structure of prosthesis and fast process of production. Therefore this device can be used for testing of fatigue life of prosthesis made by additive methods.
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Malovaný, Ondřej. "Využití 3D tisku v TZB." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2019. http://www.nusl.cz/ntk/nusl-392001.
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In the experimental part of this thesis there is an assessment of pressure bearing capacity of cylindrical nozzles printed using a 3D printer. In the theoretical part of this diploma thesis there are outlined the types of additive technologies focusing on the development of FDM printers, open designs and RepRap project. Descripti-on of the production process of 3D printing and application of additive technolo-gies in the field of HVAC. In the project part, the design of the forced ventilation of the Sports Hall is solved. The object is assessed in terms of heat losses and profits for priority rooms of functional units. Heat load coverage is carried out by air-conditioning equipment. In addition, a project is drawn up which contains all the text and drawings, including technical specifications and regulatory schemes.
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Halamíček, Lukáš. "Návrh 3D tiskárny s dvojicí tiskových hlav." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318389.
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The master thesis deals with design of multi material FDM 3D printer. In the first part, current market situation and possible principles of multi material printing are described. Possible variants of individual construction nodes are described in the next part and then the selected variant is processed into a design solution. The benefit of this thesis is a proposal of solution for the automatic printing head exchange, which is practically not concerned by printer manufacturers.
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Palmer, Andrew. "The Design and Development of an Additive Fabrication Process and Material Selection Tool." Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3635.
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In the Manufacturing Industry there is a subset of technologies referred to as Rapid Technologies which are those technologies that create the ability to compress the time to market for new products under development . Of this subset, Additive Fabrication (AF), or more commonly known as Rapid Prototyping (RP), acquires much attention due to its unique and futuristic approach to the production of physical parts directly from 3D CAD data, CT or MRI scans, or data from laser scanning systems by utilizing various techniques to consecutively generate cross-sectional layers of a given thickness upon the previous layer to form 3D objects. While Rapid Prototyping is the most common name for the production technology it is also referred to as Additive Manufacturing, Layer Based Manufacturing, Direct Digital Manufacturing, Free-Form Fabrication, and 3-Dimensional Printing. With over 35 manufacturers of Additive Fabrication equipment in 2006 , the selection of an AF process and material for a specific application can become a significant task, especially for those with little or no technical experience with the technology and to add to this challenge, many of the various processes have multiple material options to select from . This research was carried out in order to design and construct a system that would allow a person, regardless of their level of technical knowledge, to quickly and easily filter through the large number of Additive Fabrication processes and their associated materials in order to find the most appropriate processes and material options to create physical reproductions of any part. The selection methodology used in this paper is a collection of assumptions and rules taken from the author's viewpoint of how, in real world terms, the selection process generally takes place between a consumer and a service provider. The methodology uses those assumptions in conjunction with a set of expert based rules to direct the user to a best set of qualifying processes and materials suited for their application based on as many or as few input fields the user may be able to complete.M.S.
Department of Industrial Engineering and Management Systems
Engineering and Computer Science
Industrial Engineering MS
23
Vašek, Vojtěch. "Použití modelů zhotovených technologii 3D tisku při výrobě odlitků do bentonitových forem na formovací lince." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-319282.
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Shortening of the time required to make first product after demand is a crucial factor in every field of industry, not excluding the foundry. To lower this delay, there are rapid prototyping methods. The aim of this thesis is to execute an experiment and then evaluate possibilities of using patterns made by 3D FDM printer on an automatic molding line.
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Conti, Alfredo. "Tecniche della manifattura additiva - applicazioni in ambito aeronautico e aerospaziale." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13306/.
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Il potenziale delle nuove tecnologie digitali applicate al settore industriale ha consentito di ridurre enormemente la durata dei cicli produttivi grazie alla rapida gestione di quantità di dati sempre più considerevoli attraverso l’introduzione delle Macchine a Controllo Numerico (Computer Numerical Control – CNC).
Nel corso delle ultime tre decadi, l’industria manifatturiera ha subito notevoli e sostanziali cambiamenti grazie ad una sempre più forte connessione con il mondo dell’informatica.
La più grande rivoluzione in tale ambito è stata segnata dall’avvento della Manifattura Additiva (Additive Manufacturing - AM), conosciuta sotto diversi nomi, tra i quali Prototipazione Rapida (Rapid Prototyping), Manifattura Rapida (Rapid Manufacturing) o Libera Fabbricazione di Forme (Free Form Fabrication).
Materia di ricerca e sviluppo sin dalla fine degli anni ’80, la Manifattura Additiva consente la creazione di elementi fisici tridimensionali partendo da modelli CAD attraverso la sovrapposizione successiva di materiale strato per strato (layer by layer), offrendo i benefici di una elevata flessibilità geometrica degli elaborati, altrimenti irraggiungibile attraverso le tradizionali tecniche di Manifattura Sottrattiva operanti per asportazione di materiale. In seguito ad intensive ricerche, progressi significativi sono stati fatti nello sviluppo e nella commercializzazione di nuovi ed innovativi processi AM.
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Braune, Tobias Henke Karsten. "Rapid-Prototyping-Komponenten für Remoteengineering-Anwendungen /." 2008. http://www.gbv.de/dms/ilmenau/abs/560567766braun.txt.
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黃偉鈞. "A Study on the Process Parameters Improvement of FDM Rapid Prototyping Machine Using Taguchi Method." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/97064822889838578267.
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碩士明新科技大學
精密機電工程研究所
97
Due to the progress in Opto-Mechatronics technology, the maturity of CAD, and the demand for faster and less expensive product development, the flourishing development of rapid prototyping has reduced the time of developing a new product in past ten years. Rapid prototyping technology is widely used in new product development process such as form confirming, assembly testing, interference checking, and function testing. Fused Deposition Modeling (FDM) is one of the rapid prototype techniques and widely used for design verification. The objective of this research is to investigate the effect of various process parameters such as support style, part surface, part interior style, layer resolution, forming location, and forming orientation upon the accuracy of rapid prototype. The comparison of original default parameters and found optimal parameters has also investigated. The plan of experiments was set through the Taguchi method. Experiments of verification were also implemented. The results indicated the found optimal parameters improved the accuracy and shorten the building time.
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Nunes, Tiago Filipe Moreira. "Desenvolvimento de uma impressora 3D (FDM) com extrusor ajustável." Master's thesis, 2015. http://hdl.handle.net/1822/54583.
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Dissertação de mestrado integrado em Engenharia Eletrónica Industrial e ComputadoresO presente trabalho trata o estudo de um processo de impressão tridimensional (Fused Deposition Modeling) e desenvolvimento de uma nova tecnologia, metodologia e ferramenta de extrusão capaz de diminuir o tempo total de impressão de um modelo. Esta técnica de impressão tridimensional pertence ao grupo dos métodos de prototipagem rápida e consiste em obter um objeto a partir de um modelo digital de três dimensões. Este método de impressão requere um filamento termoplástico, por exemplo, polylactic acid (PLA), ou acrylayte-butadiene-styrene (ABS) que é aquecido até ao ponto de fusão e extrudido por um orifício “nozzle” com o formato e tamanho pretendido. Ao ser movimentado por um sistema de três graus de liberdade permite desenhar formas complexas depositando uma quantidade específica de um material termoplástico nos sítios adequados. Uma vez concluída uma camada horizontal, a plataforma de impressão sobe ligeiramente para dar origem a uma nova camada (normalmente distâncias que rondam os 0.05mm aos 0.3mm). Este processo repete-se sucessivamente até o modelo estar concluído. Este processo de impressão pode levar poucos minutos até algumas horas no caso de peças mais complexas. O que determina o tempo de impressão é a complexidade do modelo impresso e as características da impressora. No entanto, a velocidade de impressão não e limitada só pelos modelos impressos mas também pelas propriedades químicas dos termoplásticos que são utilizados. Foi assim feita uma pesquisa e desenvolvido um sistema de extrusão bem como o programa de corte, que permite a economia em pelo menos 50% do tempo de impressão e o aumento da resistência mecânica das peças impressas sem ultrapassar os limites funcionais da impressora 3D. Os principais resultados obtidos foram a redução de tempo de impressão, devido à capacidade e flexibilidade da nova tecnologia. Para além do objetivo principal, esta tecnologia permitiu obter modelos impressos com maior resistência mecânica.
This paper deals with the study of a three-dimensional printing process (Fused Deposition Modeling) and development of a new technology, methodology and extrusion tool that can reduce the total time printing a model. This three-dimensional printing technique belongs to the group of rapid prototyping methods and is to obtain an object from a digital model of three dimensions. This printing method requires a thermoplastic filament, for example, polylactic acid (PLA), or acrylayte-butadiene-styrene (ABS) which is heated to melting point and extruded through an orifice "nozzle" in the shape and desired size. When being moved by a system of three degrees of freedom allows designing complex shapes by depositing a specific amount of a thermoplastic material at the appropriate sites. Once completed a horizontal layer, the print platform rises slightly to give a new layer (usually distances that are around 0.05mm to 0.3mm). This process is repeated successively until the model is complete. This printing process may take a few minutes to a few hours for more complex parts. What determines the printing time is the complexity of the printed pattern and printer characteristics. However, the print speed is not limited only by the printed models but also by the chemical properties of the thermoplastics that are used. It was thus made research and developed an extrusion system and a cutting program that allows savings of at least 50% of the printing time and increase the mechanical resistance of the printed parts without exceeding the functional limits of the 3D printer. The main results were the printing time reduction, due to the capacity and flexibility of the new technology. Apart from the main goal, this technology allowed to obtain printed models with higher mechanical strength.
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Mlynek, Mario Beierke Stefan. "Entwicklung und Validierung von ASIC-Testsystemen am Beispiel eines zu entwickelnden Rapid Prototyping Testsystems für einen RFIDAutomotive Reader ASIC /." 2008. http://www.gbv.de/dms/ilmenau/abs/564558451mlyne.txt.
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Paiva, Tiago José Macedo de Figueiredo. "Desenvolvimento de um sistema autónomo de produção contínua de filamento para prototipagem rápida." Master's thesis, 2014. http://hdl.handle.net/1822/65233.
Full textAbstract:
Dissertação de mestrado integrado em Engenharia de PolímerosA presente dissertação visa expor e solucionar as lacunas existentes na área de Prototipagem Rápida de uso pessoal/doméstico e em particular na técnica FDM (Fused Deposition Modelling) aplicada em equipamentos de FDM low cost, atualmente impostas pelo uso de materiais plásticos específicos nesta tecnologia por parte dos fabricantes e o preço final praticado. O objetivo desta dissertação inclui o projeto, o acompanhamento do fabrico e o arranque, de um equipamento, caraterizado por uma mini-extrusora de duplo-fuso contra rotativa que permita ultrapassar as fragilidades de uma FDM, através de um simples processo convencional de extrusão possibilitando o uso de um leque mais alargado de materiais poliméricos e reduzindo substancialmente os custos implícitos na obtenção de modelos físicos tridimensionais. De forma a concretizar o objetivo proposto, o desenvolvimento da extrusora foi idealizado tendo em conta a metodologia definida, a identificação dos requisitos necessários para a sua elaboração, e ainda a definição de algumas variáveis necessárias para efetuar o seu dimensionamento. Durante a fase experimental foram identificadas algumas falhas, nomeadamente o amolecimento do material polimérico, devido à elevada temperatura registada na zona da tremonha, e ainda, a quebra do componente que promove o acoplamento do veio do motor à extrusora, devido à diferença de temperaturas verificada entre a cabeça de extrusão e a fieira do equipamento, causada pela colocação da posição dos cartuchos de aquecimento. Termina-se esta dissertação com algumas sugestões, no sentido de minimizar os problemas encontrados e identificados no parágrafo anterior e determinar as potencialidades na utilização deste tipo de equipamento, de modo a torná-lo mais eficaz e ainda, para desenvolvimentos futuros possíveis.
This thesis aims to expose and address inadequacies in the area of personal/home Rapid Prototyping use and in particular the FDM technique (Fused Deposition Modeling) applied in low cost FDM machines currently imposed by the use of specific plastic materials for this technology manufacturers and the final price charged. The aim of this work includes the design, manufacture and monitoring the startup of a device, characterized by a counter rotating twin screw mini-extruder that allows to overcome the weaknesses of the FDM, using a simple conventional extrusion process, enabling the use of a wider range of polymeric materials and substantially reducing the implicit costs of obtaining three-dimensional physical models. In order to achieve the proposed objective, the development of the extruder was designed taking into account the defined methodology, the identification of the requirements for its development, and even the definition of some variables needed to make its design. During the experimental period, some deffects have been identified, like softening of the polymeric material due to high temperature occurring at the hopper zone, including even breakage of the component that promotes the coupling of the motor shaft to the extruder, due to the difference of temperatures observed between the extrusion head and the die equipment, caused by the placement of the cartridge heaters. This thesis ends up with some suggestions to minimize the problems found and identified in the preceding paragraph and determine the potential of using this type of equipment in order to make it more effective and future developments.