Additive Manufactoring - Contributi utente [it]

The importance of a correct alignment in contactless inspection of Additive Manufactured part

2020-02-03T10:09:35Z

AndreaCargiolli:

'''Title:''' The importance of a correct alignment in contactless inspection of Additive Manufactured part

'''Authors and full affiliations:''' Paolo Minetola, Dept. Production Systems and Business Economics, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10146 Torino, Italy

'''Keywords:''' contactless inspection, reference frame, alignment

'''Purpose:''' Highlight that the definition of the alignment plays a crucial role in contactless inspection, particularly if the scanning device accuracy is low.

'''Importance for AM:''' In AM the tool-less fabrication of complex freeform custom-made products, tolerances and subsequent finishing operations inevitably induce a deviation of real part geometry from the original virtual model, for this reason we consider the contactless inspection a key phase of the process.

'''Design/methodology/approach:'''
[[File:Abstract2.png|miniatura|centro|Original flow diagram of the methodology]]
*CMM = Coordinate Measuring Machine
*The part was scanned by means of the structured light scanner ATOS standard and the laser triangulation scanner Vi-900.

'''Findings:''' Both software-based comparisons and CMM inspection of differently-aligned point clouds demonstrate that the selection of the points on reference features during the definition of the same part reference frame can influence the results of non-contact quality control, leading to incorrect evaluations. The results of this analysis show that in 3-2-1 alignment the inspection results are different by simply changing the point selected on an aligning feature.

'''Limitations:''' In contactless inspection, the higher number of points available in range data does not necessarily represents an advantage.

'''Practical implications:''' Awareness of the differences to traditional CMM methodologies is needed when switching to contactless inspection for the first time.

'''Originality:''' Specific works on the influence of the part alignment from scan data on the quality control results of AM part could not be found in technical literature before this article publication.

'''Full reference:''' MINETOLA, Paolo. The importance of a correct alignment in contactless inspection of additive manufactured parts. International Journal of Precision Engineering and Manufacturing, 2012, 13.2: 211-218.

'''Link:''' https://link.springer.com/article/10.1007/s12541-012-0026-2

The importance of a correct alignment in contactless inspection of Additive Manufactured part

2020-02-03T10:09:10Z

AndreaCargiolli:

The importance of a correct alignment in contactless inspection of Additive Manufactured part

2020-02-03T10:08:22Z

AndreaCargiolli: Creata pagina con "'''Title:''' The importance of a correct alignment in contactless inspection of Additive Manufactured part '''Authors and full affiliations:''' Paolo Minetola, Dept. Producti..."

'''Title:''' The importance of a correct alignment in contactless inspection of Additive Manufactured part

'''Authors and full affiliations:''' Paolo Minetola, Dept. Production Systems and Business Economics, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10146 Torino, Italy

'''Keywords:''' contactless inspection, reference frame, alignment

'''Purpose:''' Highlight that the definition of the alignment plays a crucial role in contactless inspection, particularly if the scanning device accuracy is low.

'''Importance for AM:''' In AM the tool-less fabrication of complex freeform custom-made products, tolerances and subsequent finishing operations inevitably induce a deviation of real part geometry from the original virtual model, for this reason we consider the contactless inspection a key phase of the process.

'''Design/methodology/approach:'''
[[File:Abstract2.png|miniatura|centro|Original flow diagram of the methodology]]
*CMM = Coordinate Measuring Machine
** The part was scanned by means of the structured light scanner ATOS standard and the laser triangulation scanner Vi-900.

'''Findings:''' Both software-based comparisons and CMM inspection of differently-aligned point clouds demonstrate that the selection of the points on reference features during the definition of the same part reference frame can influence the results of non-contact quality control, leading to incorrect evaluations. The results of this analysis show that in 3-2-1 alignment the inspection results are different by simply changing the point selected on an aligning feature.

'''Limitations:''' In contactless inspection, the higher number of points available in range data does not necessarily represents an advantage.

'''Practical implications:''' Awareness of the differences to traditional CMM methodologies is needed when switching to contactless inspection for the first time.

'''Originality:''' Specific works on the influence of the part alignment from scan data on the quality control results of AM part could not be found in technical literature before this article publication.

'''Full reference:''' MINETOLA, Paolo. The importance of a correct alignment in contactless inspection of additive manufactured parts. International Journal of Precision Engineering and Manufacturing, 2012, 13.2: 211-218.

'''Link:''' https://link.springer.com/article/10.1007/s12541-012-0026-2

File:Abstract2.png

2020-02-03T10:04:36Z

AndreaCargiolli:

Original flow diagram of the methodology

Contactless inspection

2020-02-03T09:58:43Z

AndreaCargiolli: Creata pagina con "*The importance of a correct alignment in contactless inspection of Additive Manufactured part"

*[[The importance of a correct alignment in contactless inspection of Additive Manufactured part]]

Main Page

2020-02-03T09:58:05Z

AndreaCargiolli: /* Trasversal issues */

[https://docs.google.com/document/d/1Dpv8YCcSNuxh99Nw9ARPFtaRnw1ZEKm8RlWba0UMcWU/edit Istruzioni (in Italian, sorry)]

=[[Materials]]=

=[[Processes]]=
*[[Fused Deposition Modeling]]
*[[Wire Arc Additive Manifacturing]]
*[[Material Jetting]]
*[[Vat Polymerization]]
*[[Selective Laser Melting]]
*[[Hybrid Additive Manufacturing]]
*[[Laser engineered net shaping]]
*[[Droplet-Based Manufacturing]]
*[[Laser Processing]]
*[[Augmented reality 3D for manual assemply workstation]]
*[[Direct energy deposition]]

=[[Parts]]=
*[[Selective Laser Melting Parts]]
*[[Medical devices]]

=[[Trasversal issues ]]=
*[[3D printing benefits on supply chain]]
*[[Contactless inspection]]

Integration of FDM surface quality modeling with process design

2020-02-03T09:47:35Z

AndreaCargiolli: Creata pagina con "'''Title:''' Integration of FDM surface quality modeling with process design '''Authors and full affiliations:''' Alberto Boschetto, Luana Bottini, Francesco Veniali; Departm..."

'''Title:''' Integration of FDM surface quality modeling with process design

'''Authors and full affiliations:''' Alberto Boschetto, Luana Bottini, Francesco Veniali; Department of Mechanical and Aerospace Engineering, Sapienza University of Rome via Eudossiana 18, 00184 Rome, Italy

'''Keywords:''' fused deposition modeling; roughness prediction; accuracy prediction

'''Purpose:''' Develop an integrated methodology able to help the process design for a Fused Deposition Modeling product with the aim to meet the tolerance and roughness requirements.

'''Design/methodology/approach:'''
[[File:Abstract.png|miniatura|centro|Original flow diagram of the methodology]]

'''Findings:''' We can find a very marked correspondence between the predicted and fabricated surface morphology for each considered configuration: only very slight deviations are observed.
This result confirms the good capability of the employed method to predict the obtainable surface finishing. Moreover, in the case study proposed in the article (a door handle), the methodology is able to orient the surface in a particular 3D rotation making the product acceptable for the required surface finish (the standard orientation φx = 0° and φy = 0° brings roughness peaks of 55 µm and makes the product not-compliant).

'''Practical implications:''' The used formulations permit to foresee the dimensional accuracy and the average roughness as a function of two FDM process parameters: the layer thickness and the deposition angle (φx and φy).

'''Full reference:''' BOSCHETTO, Alberto; BOTTINI, Luana; VENIALI, Francesco. Integration of FDM surface quality modeling with process design. Additive Manufacturing, 2016, 12: 334-344.

'''Link:''' https://www.sciencedirect.com/science/article/pii/S2214860416300926

File:Abstract.png

2020-02-03T09:46:20Z

AndreaCargiolli:

Original flow diagram of the methodology

Design for manufactoring

2020-02-03T09:40:00Z

AndreaCargiolli:

[[Post processing]]

[[Design for manufacturing of surfaces to improve accuracy]]

[[The role of re-design for Additive Manufacturing on the process environmental performance]]

[[Integration of FDM surface quality modeling with process design]]

Monitoring Approach to Evaluate the Performances of a New Deposition Nozzle Solution

2020-02-03T09:30:28Z

AndreaCargiolli:

'''Title:''' Monitoring Approach to Evaluate the Performances of a New Deposition Nozzle Solution for DED Systems

'''Authors and full affiliations:''' Federico Mazzucato (1), Simona Tusacciu (2), Manuel Lai (2), Sara Biamino (3), Mariangela Lombardi (3) and Anna Valente (1);
'''1''' SUPSI, ISTePS-Institute of Systems and Technologies for the Sustainable Production, Galleria 2, Manno (6928), Switzerland;
'''2''' IRIS S.r.l., Via Papa Giovanni Paolo II, 26, 10043 Orbassano, TO, Italy;
'''3''' Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy

'''Keywords:''' direct deposition machine; scanner systems; metallic additive manufacturing

'''Purpose:''' Promote the use of closed loop control systems and the adoption of a new deposition nozzle solution designed at the Department of Innovative Technologies of University of Applied Sciences and Arts of Southern Switzerland.

'''Design/methodology/approach:''' Analysis of the powder flow profile and of the powder distribution in three different cases (one active nozzle, two active nozzles, two active nozzles with a substrate at 15 mm). The first evaluation is done using theoretical models based on the Navier-Stokes equations and a simulation software; the second one is available thanks to a high-speed acquisition camera that records the variation of the powder flow during the experimental tests.

'''Main findings:''' 1) the solution of a shielding gas external to the carrier gas decreases the powder spread in correspondence to the deposition plane;
2) the employed model does not fit the experimental results. A new and more complex
theoretical model must be implemented to simulate the process.

'''Benefits:''' The analysed deposition nozzle can be a good solution for the improvement of the catchment efficiency of a Direct Energy Deposition system, reducing the powder spread in correspondence to the deposition plane.

'''Full reference:''' MAZZUCATO, Federico, et al. Monitoring approach to evaluate the performances of a new deposition nozzle solution for DED systems. Technologies, 2017, 5.2: 29.

'''Link:''' https://www.mdpi.com/2227-7080/5/2/29

Monitoring Approach to Evaluate the Performances of a New Deposition Nozzle Solution

2020-02-03T09:25:27Z

AndreaCargiolli:

'''Title:''' Monitoring Approach to Evaluate the Performances of a New Deposition Nozzle Solution for DED Systems

'''Authors and full affiliations:''' Federico Mazzucato (1), Simona Tusacciu (2), Manuel Lai (2), Sara Biamino (3), Mariangela Lombardi (3) and Anna Valente (1);
1 SUPSI, ISTePS-Institute of Systems and Technologies for the Sustainable Production, Galleria 2, Manno (6928), Switzerland;
2 IRIS S.r.l., Via Papa Giovanni Paolo II, 26, 10043 Orbassano, TO, Italy;
3 Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy

'''Keywords:''' direct deposition machine; scanner systems; metallic additive manufacturing

'''Purpose:''' Promote the use of closed loop control systems and the adoption of a new deposition nozzle solution designed at the Department of Innovative Technologies of University of Applied Sciences and Arts of Southern Switzerland.

'''Design/methodology/approach:''' Analysis of the powder flow profile and of the powder distribution in three different cases (one active nozzle, two active nozzles, two active nozzles with a substrate at 15 mm). The first evaluation is done using theoretical models based on the Navier-Stokes equations and a simulation software; the second one is available thanks to a high-speed acquisition camera that records the variation of the powder flow during the experimental tests.

'''Main findings:''' 1) the solution of a shielding gas external to the carrier gas decreases the powder spread in correspondence to the deposition plane;
2) the employed model does not fit the experimental results. A new and more complex
theoretical model must be implemented to simulate the process.

'''Benefits:''' The analysed deposition nozzle can be a good solution for the improvement of the catchment efficiency of a Direct Energy Deposition system, reducing the powder spread in correspondence to the deposition plane.

'''Full reference:''' MAZZUCATO, Federico, et al. Monitoring approach to evaluate the performances of a new deposition nozzle solution for DED systems. Technologies, 2017, 5.2: 29.

'''Link:''' https://www.mdpi.com/2227-7080/5/2/29

Monitoring Approach to Evaluate the Performances of a New Deposition Nozzle Solution

2020-02-03T09:24:45Z

AndreaCargiolli:

'''Title:''' Monitoring Approach to Evaluate the Performances of a New Deposition Nozzle Solution for DED Systems

'''Authors and full affiliations:''' Federico Mazzucato (1), Simona Tusacciu (2), Manuel Lai (2), Sara Biamino (3), Mariangela Lombardi (3) and Anna Valente (1);
1 SUPSI, ISTePS-Institute of Systems and Technologies for the Sustainable Production, Galleria 2, Manno (6928), Switzerland;
2 IRIS S.r.l., Via Papa Giovanni Paolo II, 26, 10043 Orbassano, TO, Italy;
3 Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy

'''Keywords:''' direct deposition machine; scanner systems; metallic additive manufacturing

'''Purpose:''' Promote the use of closed loop control systems and the adoption of a new deposition nozzle solution designed at the Department of Innovative Technologies of University of Applied Sciences and Arts of Southern Switzerland.

'''Design/methodology/approach:''' Analysis of the powder flow profile and of the powder distribution in three different cases (one active nozzle, two active nozzles, two active nozzles with a substrate at 15 mm). The first evaluation is done using theoretical models based on the Navier-Stokes equations and a simulation software; the second one is available thanks to a high-speed acquisition camera that records the variation of the powder flow during the experimental tests.

'''Main findings:''' 1) the solution of a shielding gas external to the carrier gas decreases the powder spread in correspondence to the deposition plane;
2) the employed model does not fit the experimental results. A new and more complex
theoretical model must be implemented to simulate the process.

'''Benefits:''' The analysed deposition nozzle can be a good solution for the improvement of the catchment efficiency of a Direct Energy Deposition system, reducing the powder spread in correspondence to the deposition plane.

'''Full reference:''' MAZZUCATO, Federico, et al. Monitoring approach to evaluate the performances of a new deposition nozzle solution for DED systems. Technologies, 2017, 5.2: 29.

'''Link:''' https://www.mdpi.com/2227-7080/5/2/29

Monitoring Approach to Evaluate the Performances of a New Deposition Nozzle Solution

2020-02-03T09:23:26Z

AndreaCargiolli: Creata pagina con "'''Title:''' Monitoring Approach to Evaluate the Performances of a New Deposition Nozzle Solution for DED Systems '''Authors and full affiliations:''' Federico Mazzucato1, Si..."

'''Title:''' Monitoring Approach to Evaluate the Performances of a New Deposition Nozzle Solution for DED Systems

'''Authors and full affiliations:''' Federico Mazzucato1, Simona Tusacciu2, Manuel Lai2, Sara Biamino3, Mariangela Lombardi3 and Anna Valente1;
1 SUPSI, ISTePS-Institute of Systems and Technologies for the Sustainable Production, Galleria 2, Manno (6928), Switzerland;
2 IRIS S.r.l., Via Papa Giovanni Paolo II, 26, 10043 Orbassano, TO, Italy;
3 Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy

'''Keywords:''' direct deposition machine; scanner systems; metallic additive manufacturing

'''Purpose:''' Promote the use of closed loop control systems and the adoption of a new deposition nozzle solution designed at the Department of Innovative Technologies of University of Applied Sciences and Arts of Southern Switzerland.

'''Design/methodology/approach:''' Analysis of the powder flow profile and of the powder distribution in three different cases (one active nozzle, two active nozzles, two active nozzles with a substrate at 15 mm). The first evaluation is done using theoretical models based on the Navier-Stokes equations and a simulation software; the second one is available thanks to a high-speed acquisition camera that records the variation of the powder flow during the experimental tests.

'''Main findings:''' 1) the solution of a shielding gas external to the carrier gas decreases the powder spread in correspondence to the deposition plane;
2) the employed model does not fit the experimental results. A new and more complex
theoretical model must be implemented to simulate the process.

'''Benefits:''' The analysed deposition nozzle can be a good solution for the improvement of the catchment efficiency of a Direct Energy Deposition system, reducing the powder spread in correspondence to the deposition plane.

'''Full reference:''' MAZZUCATO, Federico, et al. Monitoring approach to evaluate the performances of a new deposition nozzle solution for DED systems. Technologies, 2017, 5.2: 29.

'''Link:''' https://www.mdpi.com/2227-7080/5/2/29

Direct energy deposition

2020-02-03T09:17:58Z

AndreaCargiolli: Creata pagina con "*Monitoring Approach to Evaluate the Performances of a New Deposition Nozzle Solution"

*[[Monitoring Approach to Evaluate the Performances of a New Deposition Nozzle Solution]]

Main Page

2020-02-03T09:16:09Z

AndreaCargiolli:

Fused Deposition Modeling

2020-01-28T09:59:01Z

AndreaCargiolli:

[[Education]]

[[Design for manufactoring]]

[[Validation study of an analytical model of FDM accuracy]]

Fused Deposition Modeling

2020-01-28T09:58:06Z

AndreaCargiolli:

[[Education]]

[[Design for manufacturing]]

[[Validation study of an analytical model of FDM accuracy]]