scholarly journals Hari metalikoetan eta arku elektrikoan oinarritutako fabrikazio-gehigarriko WAAM teknologiaren oinarriak eta aplikazioak

2021 ◽  
Author(s):  
Eider Aldalur ◽  
Asier Panfilo ◽  
Alfredo Súarez ◽  
Jone M. Ugartemendia
Keyword(s):  
Additive Manufacturing ◽  
Powder Bed Fusion ◽  
Powder Bed ◽  
Powder Feed ◽  
Wire Arc Additive Manufacturing ◽  
Wire Feed

Fabrikazio-gehigarria geruzaz-geruza piezak eratzean oinarritzen den produkzio kontzeptu berria da. Fabrikazio-gehigarriaren barneko teknikek duten izaera dela eta, orain artean fabrikazio-teknika tradizionalek inposatutako diseinu mugak gainditzea ahalbidetzen dute. Material mota anitzetan lan egin dezaketen arren, lan honetan material metalikoetan oinarritutako fabrikazio-gehigarriko teknikak azalduko dira. Teknika hauek hiru multzo nagusitan sailka daitezke: Hauts-ohearen fusioa (Powder Bed Fusion, PBF), Hauts elikatzedun deposizioa (Powder Feed Systems, PFS) eta Hari elikatzedun deposizioa (Wire Feed Systems, WFS). Hauen artetik, WFS motaren barnean sailkatzen den arku eta hari bidezko fabrikazio gehigarrian (ingelesez, Wire Arc Additive Manufacturing (WAAM) bezala ezaguna) arreta berezia ezarriko da, erakusten dituen abantailak direla eta. Horien artean esanguratsuena, eskaintzen duen materialaren ezarpen-tasa altua da, tamaina handiko piezen fabrikazioa posible bihurtuz. Gainera, fabrikazio-teknika tradizionalekin alderatuz erabiltzen den material kantitatea murrizten du eta beraz, materialaren erabilera efizientzia altua lortzen da, amaierako piezatik gertu dauden aurreformak lortuz ondoren mekanizatu beharko direnak. Azkenik, WAAM teknologiaren bidez, soldagarria den edozein materialetan fabrika daitezke piezak, materiala hari metaliko formatuan sartzen delarik prozesuan. Hala, kilogramoko materialaren prezioa hari formatuan, zenbait fabrikazio-gehigarriko teknikak erabiltzen duten hauts formatuan baino askoz ere merkeagoa da. Gainera, lan honetan, zenbait aplikazio kasu ere azalduko dira aplikazio eremu bakoitzeko (fabrikazio zuzena, ez-zuzena eta konponketak) adibide bat azalduz.

scholarly journals Study of Arc-wire and Laser-wire processes for the realization of Ti-6Al-4V alloy parts

2020 ◽  
Vol 321 ◽  
pp. 03002
Author(s):  
A. Ayed ◽  
G. Bras ◽  
H. Bernard ◽  
P. Michaud ◽  
Y. Balcaen ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Travel Speed ◽  
Feed Speed ◽  
Laser Additive Manufacturing ◽  
Powder Bed ◽  
Wire Feed Speed ◽  
Manufacturing Techniques ◽  
Parameter Ranges ◽  
Wire Arc Additive Manufacturing ◽  
Wire Feed

Arc-wire or laser-wire additive manufacturing seems promising because it allows large parts to be produced with significant deposition rates (ten times higher than powder bed additive manufacturing), for a lower investment cost. These additive manufacturing techniques are also very interesting for the construction or the repair of parts. A versatile 3D printing device using a Wire Arc Additive Manufacturing (WAAM) station or laser device Wire Laser Additive Manufacturing (WLAM) for melting a filler wire is developed to repair and build large titanium parts. The final objectives of the study are to optimize the process parameters to control the dimensional stability, the metallurgical and mechanical properties of the produced parts. In this paper, an experimental study is carried out to determine the first order process parameter ranges (synergic law, laser power, wire feed speed, travel speed) appropriate for these two techniques, for repair or construction parts on Ti-6 Al-4V.

Multi-material model for the simulation of powder bed fusion additive manufacturing

2021 ◽  
Vol 194 ◽  
pp. 110415
Author(s):  
Vera E. Küng ◽  
Robert Scherr ◽  
Matthias Markl ◽  
Carolin Körner
Keyword(s):  
Additive Manufacturing ◽  
Material Model ◽  
Powder Bed Fusion ◽  
Powder Bed

scholarly journals GEOMETRICAL BENCHMARKING OF LASER POWDER BED FUSION SYSTEMS BASED ON DESIGNER NEEDS

2021 ◽  
Vol 1 ◽  
pp. 1657-1666
Author(s):  
Joaquin Montero ◽  
Sebastian Weber ◽  
Christoph Petroll ◽  
Stefan Brenner ◽  
Matthias Bleckmann ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Use Case ◽  
Powder Bed Fusion ◽  
Design For Additive Manufacturing ◽  
Laser Powder Bed Fusion ◽  
Measuring Systems ◽  
Powder Bed ◽  
Geometric Dimensioning And Tolerancing ◽  
Uncertainty Map ◽  
New System

AbstractCommercially available metal Laser Powder Bed Fusion (L-PBF) systems are steadily evolving. Thus, design limitations narrow and the diversity of achievable geometries widens. This progress leads researchers to create innovative benchmarks to understand the new system capabilities. Thereby, designers can update their knowledge base in design for additive manufacturing (DfAM). To date, there are plenty of geometrical benchmarks that seek to develop generic test artefacts. Still, they are often complex to measure, and the information they deliver may not be relevant to some designers. This article proposes a geometrical benchmarking approach for metal L-PBF systems based on the designer needs. Furthermore, Geometric Dimensioning and Tolerancing (GD&T) characteristics enhance the approach. A practical use-case is presented, consisting of developing, manufacturing, and measuring a meaningful and straightforward geometric test artefact. Moreover, optical measuring systems are used to create a tailored uncertainty map for benchmarking two different L-PBF systems.

Establishing Specimen Property to Part Performance Relationships for Laser Beam Powder Bed Fusion Additive Manufacturing

2021 ◽  
pp. 106384
Author(s):  
Arash Soltani-Tehrani ◽  
Rakish Shrestha ◽  
Nam Phan ◽  
Mohsen Seifi ◽  
Nima Shamsaei
Keyword(s):  
Additive Manufacturing ◽  
Laser Beam ◽  
Powder Bed Fusion ◽  
Powder Bed
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