Additive manufacturing is an advanced manufacturing method used to fabricate prototypes, tooling as well as functional products. Additive manufacturing helps us produce complex parts as single-unit objects, which was not possible with the traditional manufacturing methods. There are different types of additive-manufacturing technologies, including selective laser melting, laser-metal-deposition process, fused deposition modeling and electron-beam melting. All these additive-manufacturing technologies produce three-dimensional (3D) objects by adding materials layer after layer. A 3D object is built directly from a 3D computer-aided-design (CAD) model of the object. Additive manufacturing is a very promising method for the aerospace industry, in particular because of its ability to reduce the buy-to-fly ratio. This technology is the technology of the future because it is going to change the way products are designed and manufactured. In this research, various additive-manufacturing technologies are described in detail and some of the research works in this field are also presented. The future research directions are also highlighted. Keywords: additive manufacturing, fused deposition modelling, laser metal deposition, selective laser melting, selective laser sintering Dodajalni proizvodni proces je napredna tehnologija, ki se uporablja za izdelavo prototipov, orodij in funkcionalnih izdelkov. Z naprednim proizvodnim procesom lahko izdelamo izdelke ali dele kompliciranih oblik, ki jih ni mo`no izdelati s tradicionalnimi metodami proizvodnje. Obstajajo razli~ne vrste naprednih dodajalnih tehnologij, kot so na primer: selektivno lasersko nataljevanje, proces laserskega nana{anja (depozicije) kovin, modeliranje z nana{anjem staljenih kapljic in taljenje z elektronskim curkom. Vse te napredne dodajalne tehnologije omogo~ajo izdelavo tridimenzionalnih (3D) izdelkov z dodajanjem materialov plast za plastjo. Tridimenzionalni produkt je izgrajen neposredno s pomo~jo 3D-ra~unalni{ko podprtega modeliranja (angl. CAD). Napredna dodajalna proizvodnja je zelo obetavna proizvodna metoda, predvsem v letalski in vesoljski industriji, {e posebej zaradi sposobnosti zmanj{evanja stro{kov izdelave (zmanj{anje razmerja med maso materiala, potrebnega za izdelavo dolo~enega izdelka in njegovo dejansko maso). Klju~ne besede: dodajalna proizvodnja, modeliranje z nana{anjem staljenih materialov, laserska depozicija kovin, selektivno lasersko nataljevanje, selektivno lasersko sintranje
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