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Academic literature on the topic 'Additiv tillverkning'
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Dissertations / Theses on the topic "Additiv tillverkning"
Ståhl, Dennis, and Siyu Guo. "Innovation genom additiv tillverkning." Thesis, KTH, Maskinkonstruktion (Inst.), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230585.
Full textAdditive manufacturing, AM, is a technique that is developing in an incredible pace. Conventional manufacturing methods, like lathe turning or casting for instance, are limited when it comes to creating products with complex geometries, in these cases AM is a good complement. Previously though, material characteristics like tensile strength and yield point is something that AM has been compensating with. But in the current rate of development, the AM-technique can soon replace most conventional manufacturing methods completely. The purpose of this project is to describe the possibilities in AM today and what could be expected in the future.Since complex geometries is not a problem with AM, the products can be produced in only one step compared to conventional methods where it often takes several steps to produce a product. AM with metal is something that is developing fast and there are already many different methods, for instance Selective Laser Sintering, Selective Laser Melting, Beam Metal Deposition, Electron Beam Melting and Binder Jetting. These methods use different techniques to create prototypes and they all have their pros and cons what matters cost, strength and working speed.Tools in all forms are examples of products that requires high performance and a long life-span. To integrate the requirement of high performance and the possibilities with complex geometries through AM, a twisted drill with internal cooling channels is produced in this project. The internal cooling channels are shifting in diameter to optimize the inlet of coolant and at the same time increase the outlet.As mentioned earlier there are many different methods for AM in metal. The method that is considered the best for this purpose is Selective Laser Melting since this method creates compact metal products with high strength. A 3D-model of the twisted drill was created in Solid Edge ST9 and was then analyzed in ANSYS Workbench to see the impact of the internal cooling channels during use of the drill. The results show that the total deformation is 0,68μm and maximum tension is 33,95MPa, both in the middle of the drill. Neither the total deformation or the maximum tension reaches a critical limit and therefor the drawn conclusion is that this model would reach the requirements given to a drill.The development of new methods in AM with metal is going fast and in a near future the new techniques will have increased in working speed so much and be price effective enough to replace most of the conventional manufacturing methods completely.
Hansson, Jakob. "Framtidens former Additiv tillverkning." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-274924.
Full textThe key to progress within every form of engineering in addition to product development whihin all markets is the capacity to manufacture new and improved products. The demands and need flr better and better products has brought forth a constant evolution within manufacturing systems from the traditional methods as forging, drilling and casting, to the modern additive systems. This work, created in association with KTHs Department of machine design, examines and investigates 5 out of the 7 major families of additive manufacturing with the purpose of trying to define the future potential of additive manufacturing. In addition, for each system, a possible product or profession is suggested, made possible by the system in question. This is done to clarify the characteristics of that system. This work also demonstrates the product development of a highly customized product, protective shells for small models, motivation behind the additive system of choice and the result of the iterative design process. The investigation, the product development as well as expert opinion resulted in a discussion that both considers additive manufacturing future potential as well as how this potential is affected by the Covid-19 pandemic of 2020. As a conclusion is the future for additive manufacturing very promising with several different directions in which development can go.
Hajzeri, Tesi. "3D-skrivare inom bilindustrin : Additiv tillverkning gentemot traditionell tillverkning." Thesis, KTH, Industriell produktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-233237.
Full text3D technology gets increasing attention in the automotive industry. Additive manufacturing hasalready been implemented to a significant extent, for example on prototype production. On theother hand, a drastic technological change is needed for the automotive industry to handle thedemands of consumers and society.In this research, the 3D printer's role in the automotive industry is highlighted and investigated. Inthe study, the focus is on resource-efficient manufacturing using 3D printers. The goal is toexamine what the introduction of 3D printers means for this industry and the society. Furthermore,pros and cons are analysed and obtained with the help of literature studies and interviews. Inaddition, the impact of 3D printers on market structures and on the company's external and internaldynamics is investigated. In summary, the potential and the challenges of additive manufacturingin the automotive industry are examined.There is not a substantial amount of research in the field since 3D printers have been introducedquite recently to the car manufacturing and implementation is still at research and prototypeproduction level. Therefore, the aim with this work is to provide a comprehensive image of 3Dprinter implementation on all processes in the production sector.One conclusion from the study is that this technology can lead to a paradigm shift for theautomotive industry. However, 3D printing technology needs to be developed and improved tobecome more widely used. More research on the subject is needed and an effort to introducecourses and laboratory work in additive manufacturing at universities is necessary to promote 3Dtechnology's advancement in production.
BJÖRK, OSKAR. "Additiv Tillverkning i Försvarsapplikationer. : Förberedande studie för implementering av additiv tillverkning inom Försvarsmakten/FMV." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263176.
Full textAdditive Manufacturing, or 3D-printing as it is most commonly known is one of the major trends in production today. The technique has a certain part in the future of production industry and is one clear contributor to the fourth industrial revolution, industry 4.0 (Additive Manufacturing at Industry 4.0, 2018). 3dD-printing and additive manufacturing is not to be viewed as one specific technique. It should be considered as a collection of techniques which could be described as computer controlled and the geometries being fabricated by adding material in layers. The development of additive manufacturing is mainly lead by the civil industry and there are today many successful commercial implementations of additive manufacturing within production and development. There are a few key factors pushing this development. First is the fact that you with additive manufacturing might be able to manufacture geometries otherwise not possible with traditional techniques. It could also be producing lighter products or achieve shorter lead times for development of components and systems The development of additive manufacturing for Security and defense is however generally behind in area and the Swedish Armed Forces and Swedish Material Administration Department (FMV) is no exception. There are though some clear positive potentials with additive manufacturing specific to a military application. For example, the ability to create better logistic support and spare part management with the unique possibility to manufacture complex components in an isolated environment. There are many barriers before implanting additive manufacturing within the Swedish Armed Forces and FMV. System safety and legal questions connected to 3D-printing of components is one of the major areas that must be considered. These questions could however be dealt with if they are handled in a structured way. This report therefore covers additive manufacturing in general and presents methods and processes to create a better understanding of how additive manufacturing could be implemented within FMV and the Swedish Armed Forces in the future.
Andersson, Filip, and Rodan Hanna. "Additiv tillverkning : Processval och resurseffektivitet." Thesis, KTH, Industriell produktion, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192331.
Full textManufacturing processes have great impact on resource effectiveness, companies combine their limited resources to add value to raw material and create revenue. By implementing modern manufacturing processes companies may achieve greater resource effectiveness. This report explores some of the additive manufacturing processes and their technical characteristics, by viewing the technical possibilities and limits of the Powder Bed Fusion (PBF) and Fused Deposition Modeling (FDM)-processes the report evaluates their resource effectiveness and eligibility. The research is based on a literature study and interviews with representatives from the Swedish additive manufacturing industry. The PBF and FDM enable manufacturers to process both metals and polymers and create complex geometries that are difficult to achieve with traditional manufacturing. The process from raw material to finished part is similar for PBF and FDM and unlike any other form of manufacturing. However, the choice of material and process affect the level of resource effectiveness and part quality. This research identifies three ways in which FDM and PBF processes may contribute to a higher level of resource effectiveness. The processes may be used to improve time and material-effectiveness, resource effectiveness may also be increase by using the processes to add unique value to parts or raw material. The research evaluates the benefits of the FDM and PBF processes in the designphase, furthermore processtime and time for post processing are evaluated. The research concludes that SLS is the most time effective process. PBF parts need post processing due to poor surfaces, SLm need post processing due to thermal stress and FDM need post processing due to poor precision and support structure removal. The report gives concrete examples of material effectiveness in the different processes and identifies value-creating factors such as precision, range of material and mechanical properties. Manufacturers achieve best mechanical properties with the EBM process, SLm and SLS processes provide the widest range of materials while FDM processes is the cheapest and most available. The precision is based on layer thickness, SLm operates with the thinnest layers ant therefore also provides the most accurate parts. The technical data collected from literature and interviews indicate that the processes may be used to increase resource effectiveness given the right circumstances, however the resource effective success depends on how the processes are used and to what end.This research serves as a first overview for manufacturers interested in implementing PBF and FDM processes or buying products manufactured in any of the processes. With respect to the wide range of applications and final part result, further investigations of resource effectiveness and cost effectiveness are necessary to fully evaluate the processes.
Tavajoh, Sara, and Huynh Michael. "Marknadsundersökning kring additiv tillverkning i Sverige." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Maskinteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-40858.
Full textWithin the industrial sector, an increased interest and usage of Additive Manufacturing (AM) throughout the decade has been formed. The layer-upon-layer building technology has been seen and recognized as one of the next industrial revolutionizing methods of production. As the technology is still in the trending and uprising phase it should be considered that its full potential has not yet been achieved, as large opportunities for implementation of AM exist and that new companies and markets have a growing interest in this technology. Through this study a market research was conducted to identify and present what opportunities and obstacles there are for an increased usage of AM in Sweden. A literature study on the Swedish market has been made to present the market as of today. Eight qualitative interviews have also been conducted with companies within the industrial sector to identify the areas of use within AM for production. The concepts and models used to analyze these questions was PEST, Marketing Mix and SWOT. The concluded results for advantages in using AM are shortened lead times, reduced costs of production of components and tools, reduced material waste and optimization of design processes with increased creativity. The concluded challenges are expensive materials and machine, the quality of finished components, limited printing volume due to the 3D-printers and reliability of printing processes. The finalized opportunities that are presented in this work are that AM is dependent on how much research on the subject and factors around it is done. How AM will be applied in the coming future revolves around the advancement in the technology. The obstacles that are found in this study are lack of competence and lack of standard for materials and processes within AM.
Karlsen, Joakim. "Omkonstruktion av vapenfäste till additiv tillverkning." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Industriell produktutveckling, produktion och design, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-45222.
Full textLiljestrand, Mathias, and Kirill Ljungberg. "Utveckling av betong för additiv tillverkning." Thesis, KTH, Byggteknik och design, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230736.
Full text3D writing of concrete has great potential for future building engeneering. Other industries such as the automotive industry, pharmaceutical industry, aerospace industry, etc. have already additive manufacturing methods for commercial purposes. The reason for this is the high standards set in the construction industry as well as difficulties to balance the demanded properties. At the additive manufacturing creates objects through that the matter be placed in the warehouse incrementally. The objects are first created digitally as a 3D object, which is then divided into horizontal layers. Then a 3D printer follows a pre-programmed path where it places the material until the object has reached its final form. . Despite the major challenges so for additive manufacturing methods in the construction industry, with potential benefits that outweigh the difficulties; complex designs for low cost, no material waste, fast build time, less labor, , less environmental degradation, etc. Conventional concrete is unusable when the concrete for additive manufacturing methods require properties that have not previously been demanded. It should be fluid enough for pumping but at the same time rigid enough for stacking. The concrete opening time is required to be constant in order to avoid that the concrete starts to harden before it is printing. The report intends to contribute to the development of concrete adapted for additive manufacturing methods in the construction industry. This is accomplished through the development and analysis of new types of concrete. There are no standard and proven methods for assessing concrete adapted for additive manufacturing methods. How the manufacturing method affects the environment is examined with the aim of reducing environmental impacts. A good concrete mix for additive manufacturing methods is based not only on its structural purpose, but also on the type of nozzle used. Because of this, it is currently impossible to create a universal mix that is adapted for all of the nozzles and the printer system. The concrete requires a high cement share which leads to higher carbon dioxide emissions, but the percentage of concrete required is lower due to no material play. Additives are used to lower the cement share and achieve a more cohesive concrete mixture. The final concrete mixtures have room for improvement. Further adjustments of vct, additives, reinforcement and chemical admixtures should be made for the development of concrete for additive manufacturing methods.
Regestam, Karl-Johan. "Additiv tillverkning av kylblock i metall." Thesis, KTH, Maskinkonstruktion (Inst.), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-201212.
Full textThe market for additive manufacturing is growing. The manufacturing process is used to create complex prototypes and completed components. The main areas of today are implants and aerospace industries but the market is constantly growing and is taking ground in other areas. One that has great potential is watercooling systems. The combination of cooling systems and additive manufacturing techniques provides a great opportuny to improve the fluid flow and heat exchange.This report shows the development of a chosen cooling concept. The cooling concept is revised with relevant calculations and it is also idealized for a final concept. The concept takes advantage of additive manufacturing with metal powder instead of traditional methods such as milling. The report also examines the possibility of combining different materials such as metal and polymer. Also the ability having different structures of the same material is examined.The result of the conceptual development contents a rendered concept image and a prototype of the cooling system. The prototype provides an equal cooling of the surface. The cooling system is also suitable for additive technology. The survey for mixing materials shows that it is possible to attach polymer with metal but the method is not suitable for additive manufacturing. None of the manufacturing companies shows a method to mix the materials.
Bousquet, Anna. "Additiv tillverkning i metall och topologioptimering." Thesis, Mälardalens högskola, Innovation och produktrealisering, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-36310.
Full textArbetet har utförts som en fallstudie på Scania CV som tillverkar lastbilar, bussar samt industri- och marinmotorer. Syftet med projektet var att undersöka hur topologioptimering kan användas för konstruktion av slutprodukter som ska tillverkas med additiv tillverkning (AM) i metall. Utifrån det togs tre frågeställningar fram som låg till grund för projektet. Huvudfrågeställningen var Hur kan topologioptimering användas vid konstruktion av artiklar för additiv tillverkning i metall? För att kunna svara på det krävdes mer kunskap om additiv tillverkning vilket ledde till följande två frågeställningar: Vilka produkter är lämpliga för additiv tillverkning i metall? samt Vilka faktorer behöver tas hänsyn till vid konstruktion för direkttillverkning av slutprodukter i metall med additiv tillverkning? De största fördelarna med additiv tillverkning som framkom i litteraturen var korta ledtider, möjlighet att tillverka komplexa geometrier och slå samman flera delar till en enda. Användningsområden för additiv tillverkning var allt från prototyper till serietillverkning samt tillverkning av verktyg och reservdelar. De artiklar som är lämpliga att tillverka med AM är de som är dyra att tillverka traditionellt på grund av komplex geometri, dyra verktyg eller låga volymer. Men även artiklar som får ge avkall på funktion för att tillverkas eller har långa ledtider och höga lagerkostnader. Andra faktorer som är viktiga att tänka på är byggytans storlek för den maskin som ska användas samt vilken byggriktning som väljs, behovet av stödmaterial vid tillverkning och efterbearbetning av utskriven detalj. En fallstudie genomfördes baserat på Design for Additive Manufacturing som är en metod för att konstruera artiklar för AM. Metoden går ut på att bestämma vad komponenten ska ha för funktioner och prestanda, slå samman eventuella delkomponenter, optimera utformningen och sedan kontrollera att den är möjlig att tillverka. Under fallstudien undersöktes två fästen med topologioptimering och resultaten importerades till Catia för att skapa CAD-modeller. Resultatet påvisade att det är möjligt att skapa en automatisk CAD-modell i Catia utifrån resultatet från topologioptimeringen. Däremot blir resultatet inte tillräckligt bra för att i nuläget kunna använda den automatiska modellen för tillverkning av slutprodukter. Resultatet från fallstudien tyder dock på en viktminskningspotential runt 30 % även för redan lättviktsoptimerade artiklar anpassade för andra tillverkningstekniker vid anpassning till AM. Eftersom lastkapaciteten är en avgörande faktor för kundens val av fordon samt för att uppfylla gällande lagstiftning kring fordonets totalvikt och minska miljöpåverkan så är lättviktsoptimering av alla ingående komponenter ett viktigt utvecklingsområde. Därmed är även topologioptimering och AM intressant att undersöka vidare. För att AM i dagsläget ska vara lönsamt för tillverkning av slutprodukter rekommenderas i första hand små, geometriskt komplexa artiklar som är dyra att tillverka traditionellt på grund av exempelvis höga verktygs- eller bearbetningskostnader eller små volymer.