Uporaba naknadnih končnih obdelav na kovinskih aditivno izdelanih izdelkih

Sedej, Gašper (author), Pušavec, Franci (mentor)

V diplomski nalogi je zajeta literatura s področja 3D-tiskanja kovin s tehnologijo selektivnega laserskega taljenja – SLM (ang. Selective Laser Melting – SLM). Predstavljena je naknadna obdelava s frezanjem, ki je ključnega pomena, da 3D-tiskanim izdelkom zagotovimo zahtevano hrapavost površin in visoko dimenzijsko natančnost. V diplomskem delu sta obe tehnologiji analizirani in aplicirani na jedru brizgalnega orodja s konformnim hlajenje. Konformni hladilni kanali so, zaradi lastnosti tehnologije SLM, neenakomerno hrapavi, zato sta v delu analizirani tehnologiji poliranja z abrazivnim tokom – AFM (ang. Abrasive Flow Machining – AFM) in kemijskega poliranja. Fizično izvedeno in analizirano je bilo 3D-tiskanje, naknadna obdelava in kemijsko poliranje. Rezultati so primerjalno analizirani z vidika kakovosti površine, časa obdelave in stroškov. Konformni hladilnimi kanali zagotavljajo enakomernejše in hitrejše hlajenje izdelka v primerjavi s klasičnim hlajenjem. Razvidno je, da kemijsko poliranje izboljša hrapavost konformnih kanalov (iz Ra = 7,51 µm na Ra = 2,15 µm), vendar pa je odvzem materiala pri tej tehnologiji nekontroliran. S tehnologijo AFM bi se lahko doseglo še boljšo hrapavost površine; ampak, zaradi geometrijske omejitve, v diplomski nalogi fizična aplikacija te tehnologije ni bila izvedena.

• Language: Slovenian
• Keywords: 3D-tiskanje kovin, aditivne tehnologije, 5 osne obdelave, kemijsko poliranje, konformni hladilni kanali, SLM tehnologija, CAD program, CAM program
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [G. Sedej]
• Year: 2019
• Number of pages: XXII, 54 str.
• PID: 20.500.12556/RUL-109406
• UDC: 621.9.04:004.92:669(043.2)
• COBISS.SI-ID: 16862491
• Publication date in RUL: 01.09.2019

SEDEJ, Gašper, 2019, Uporaba naknadnih končnih obdelav na kovinskih aditivno izdelanih izdelkih [online]. Bachelor’s thesis. Ljubljana : G. Sedej] . [Accessed 24 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=109406

Secondary language

• Language: English
• Title: The employment of post-processing technologies on additively produced metal parts

Abstract

This diploma thesis covers the literature in the field of additive manufacturing using selective laser melting – SLM. Milling is introduced, as a post-processing technology, which is crucial to ensure required surface roughness and high dimensional accuracy of 3D printed parts. In the thesis, both technologies are analyzed and applied in the production of a conformal cooled injection mould core. Due to the specific nature of SLM technology, the cooling ducts have uneven roughness; therefore, abrasive flow machining – AFM and chemical polishing technologies are used afterwards. 3D printing, post-processing and chemical polishing were physically performed and analyzed. The results are comparatively analyzed on regard to surface quality, processing time and cost. Conformal cooling provides uniform and faster cooling of the product, compared to the conventional cooling. Chemical polishing has shown an improvement in surface roughness of the channels (from Ra = 7,51 µm to Ra = 2,15 µm); moreover, using this technology, the material removal cannot be fully controlled. In addition, using AFM, even better surface roughness can be achieved; however, due to the geometric limitations of the part, the physical application of this technology was not performed.

• Keywords: 3D-metal printing, additive manufacturing, 5 axis machining, chemical polishing, conformal cooling channels, SLM technology, CAD software, CAM software