Introduction to Additive Manufacturing

Godec, Damir; Pilipović, Ana; Breški, Tomislav; Ureña, Julia; Jordá, Olga; Martínez, Mario; González-Gutiérrez, Joamín; Schuschnigg, Stephan; Leoben, Montanuniversität; Blasco, José Ramón; Portolés, Luis

doi:10.1007/978-3-031-05863-9_1

Cited by 16 publications

(26 citation statements)

References 34 publications

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“…[15] Some of these guidelines are even specifically adapted to manifolds. [16] However, neither these guidelines nor the "Design for additive Manufacturing" (DfAM) [17] provide concrete rules for individual case decisions [18]. For example, if a circular cross-sectional area is not horizontally printable, various self-supporting channel geometries are available.…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing of Hydraulic Components - Pressure Loss Comparison of Different Self-Supporting Channel Geometries

Tappeiner,

Donners,

Schmid

et al. 2024

14th International Fluid Power Conference

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Additive manufacturing (AM) and in particular laser powder bed fusion (LPBF) are increasingly being used as manufacturing technology in hydraulics for flow optimization, function integration and weight reduction. These advantages can especially be exploited in hydraulic manifolds. Conventional manifold intersections are created by crossing two vertical bores. The turbulence resulting from the sharp edges and the deflection leads to undesired flow losses. These can be avoided with the design freedom of LPBF, which allows flow optimization in hydraulic channels. However, the development of new channel geometries is limited by design guidelines. Starting from a straight, round channel geometry, this paper presents the steps to design self-supporting channel geometries for horizontal build up. Therefore, different cross-sectional shapes are tested, and critical design details are explained. In addition, this paper examines the influence of post-processing methods on AM components. A comparison of the different geometries is shown with a CFD simulation as well as FEM simulation for strength investigation. For experimental investigation and simulation validation, selected test specimens were printed and post-processed. With a new designed test rig, the pressure losses of the different geometries and post-processing methods were measured and a comparison with the simulative results is shown. Overall, this paper provides an overview of the necessary steps in the design of hydraulic AM components for flow optimization.

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Section: Introductionmentioning

confidence: 99%

Additive Manufacturing of Hydraulic Components - Pressure Loss Comparison of Different Self-Supporting Channel Geometries

Tappeiner,

Donners,

Schmid

et al. 2024

14th International Fluid Power Conference

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“…It is a method encompassed within what is known as additive manufacturing (AM). [2][3][4] Instead of removing material, as in conventional manufacturing, what the 3D printer does is add it layer-by-layer. Also, 3D printing and 3D printers are technologies that are growing, getting better, and developing all the time.…”

Section: Introductionmentioning

confidence: 99%

“…The International Organization for Standardization (ISO) [ 1 ] says that 3D printing is “making things by putting down layers of a material with a print head, nozzle, or other printing technology.” It is a method encompassed within what is known as additive manufacturing (AM). [ 2–4 ] Instead of removing material, as in conventional manufacturing, what the 3D printer does is add it layer‐by‐layer. Also, 3D printing and 3D printers are technologies that are growing, getting better, and developing all the time.…”

Section: Introductionmentioning

confidence: 99%

Additive Manufacturing of Polymer‐Based Lubrication

Hossain

Jiang

Yao

et al. 2023

Macro Materials & Eng

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The fast growth of 3D printing technology gives designers many ways to make structures that are hard to see. 3D printing lets you customize complex structures in any way you want and make rapid prototypes of materials. It enables you to simulate things more effectively. So far, experiments with polymer‐based lubrication have been done on atomically smooth surfaces, under dynamic conditions, and on the nano‐ or micro‐scale. Polymer‐based lubrication in 3D printing has been studied in depth, which has made it possible to make significant, multifunctional 3D structures with microscale accuracy. It is a crucial way to approach lubrication and has sparked much scientific interest. A thorough literature review is done to keep track of the latest advances in 3D printing for structural polymer‐based lubrication simulation. The design and lubrication performance quality of bio‐inspired, different‐sized simulation structures is given much attention. The material requirements, skills, and representative applications of various 3D printing technologies are summarized. The efficient directions for future research in designing and making 3D‐printed lubrication structures are also pointed out.

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“…Laser-based powder bed fusion (PBF-LB/M) is the most applicable of all the standardized methods of additive manufacturing (AM) in terms of industrial applications, due to its capability of fabricating complex parts with high dimensional accuracy [1][2][3]. The PBF-LB/M process uses a laser beam to melt thin (<0.1 mm) layers of metal powder on top of previously melted and fused layers until the required design is complete.…”

Section: Introductionmentioning

confidence: 99%

Validation of powder layering simulation via packing density measurement for laser-based powder bed fusion

Haapa,

Gopaluni,

Piili

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Powder bed fusion using a laser beam (PBF-LB/M) is considered one of the most versatile additive manufacturing methods as the parts printed have high resolution thanks to the low layer thickness used. The powder packing density (PD) of the powder layer has a significant impact on the density, surface roughness and other mechanical properties of the built parts. Due to the difficulty of characterizing the powder bed in situ, simulation has often been used to study the powder behavior on the powder bed. However, in order for the simulation to have practical value, there must be some way of confirming the results via experimental methods, also called validation. The aim of this study was to develop a powder packing density-based validation method for a powder bed simulation. The developed method featured a simplistic “open cup” style sample which traps powder inside for PD measurement. The samples were built with an EOS M 290 PBF-LB/M system using Alloy 718 (also known as “IN718” or “Inconel”) powder. Average PD over the five built samples was 52.4 %, with a standard deviation of 0.2 %. The method was used to successfully validate a powder bed simulation with four recoated powder layers, modelled using FLOW-3D DEM simulation software from Flow Science Inc. Similar methods for PD characterization were found in literature, but in many cases the method does not fully correspond to the conditions of a simulated powder bed, the scale is very small, or the reliability of the PD measurement is not confirmed. The method presented in this study corresponds to typical powder bed simulation conditions, while retaining high reliability and repeatability of results.

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Introduction to Additive Manufacturing

Cited by 16 publications

References 34 publications

Additive Manufacturing of Hydraulic Components - Pressure Loss Comparison of Different Self-Supporting Channel Geometries

Additive Manufacturing of Hydraulic Components - Pressure Loss Comparison of Different Self-Supporting Channel Geometries

Additive Manufacturing of Polymer‐Based Lubrication

Validation of powder layering simulation via packing density measurement for laser-based powder bed fusion

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