Additive Manufactoring - Contributi utente [it]

Environmental and economic comparison between WAAM and machining

2020-02-03T12:04:29Z

ElisaSimonetti:

'''Authors:''' P. C. Priarone, G. Campatelli, F. Montevecchi, G. Venturini, L. Settineri.

'''Keywords:''' Sustainable development; Additive Manufacturing; Machining.

'''Purpose:''' Additive Manufacturing has proved to be suitable for supporting or even replacing traditional manufacturing approaches in some industrial contexts. Among the various processes that can be used to produce metal parts, Wire Arc Additive Manufacturing (WAAM) is known to be an economically convenient, welding-based direct energy deposition technique for large parts with reduced complexity. The present paper proposes a structured modelling framework to assess whether WAAM could successfully substitute machining processes. The costs, manufacturing times, energy demand and carbon footprint are considered.

'''Methodology:''' WAAM is a welding-based technique that is suitable for producing three-dimensional geometries, layer-by-layer. A substrate to build the part on is needed. For this purpose, one industrial best practice is the use of simple-shaped portions of the final component, previously manufactured by means of other processes (such as machining). This strategy can prevent the detachment of the additively manufactured part from the base plate, and allows conventional technologies to be used to produce the massive features. However, this also implies the need of several manufacturing steps with different material feedstocks. In addition, a post-AM finishing process is required, since the quality of the as-deposited surfaces is low. A framework that can be used to assess and compare the performance of a WAAM-based approach and machining has been proposed.

'''Findings:''' The methodology has proved to be suitable for identifying whether WAAM could successfully substitute machining processes. Even if the conclusions are limited to the considered part under investigation (which did not need support structures to be built), the integrated approach appears to be favourable towards environmental stress, when it is possible to exploit its superior efficiency for raw material usage, even at the expense of higher processing times and costs.

'''Practical implications:''' Industries adopt WAAM for the high productivity and the speed of realization of the manufacture article with unparalleled efficiency and cost advantages in the production of large parts.

'''Full reference:''' PRIARONE, Paolo C., et al. A modelling framework for comparing the environmental and economic performance of WAAM-based integrated manufacturing and machining. CIRP Annals, 2019.

'''Link:''' https://www.sciencedirect.com/science/article/pii/S0007850619300319

'''Grafical abstract:''' Unit processes and main qualitative flows of the WAAM-based integrated manufacturing approach.

[[File:Waamimage.png|miniatura|centro]]

[[Utente:ElisaSimonetti|ElisaSimonetti]]

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

2020-02-03T12:02:10Z

ElisaSimonetti:

'''Authors:''' P. C. Priarone, G. Ingarao, V. Lunetto, R. Di Lorenzo, L. Settineri.

'''Keywords:''' Sustainability; Additive Manufacturing; Life Cycle Assessment; Energy demand.

'''Purpose:''' At present, economic and technological design criteria for products and processes should be matched with the minimization of environmental
impact objectives. Manufacturing, material production, and product design are strictly connected stages. The choice of a production system
over another could result in significant material and energy/resource savings, particularly if the component has been properly designed for
manufacturing. In this scenario, Additive Manufacturing, which has been identified as a potential disruptive technology, gained an increasing
interest for the creation of complex metal parts. The paper focuses on the tools, based on the holistic modelling of additive and subtractive
approaches, which could be used to identify the production route allowing the lowest energy demand or CO2 emissions.

'''Methodology:''' Two different production approaches, based either on machining or additive manufacturing, have been assessed. An analysis has been adopted to quantify the primary energy demand and the CO2 emissions related to the life cycle of the components. A single part has been assumed as functional unit. The impacts of material production, part manufacturing, use, and disposal have been included, while the transportation-related
impact has been excluded. One of the key differences between the two approaches could be traced back to the masses of produced parts. The re-design for AM could lead to a reduction of the mass of the additively manufactured component while ensuring the same in-work performance of conventionally machined products.

'''Findings:''' The main results confirm that AM could be an environmental-friendly choice when allowing the same in-use performance, a better efficiency in raw material usage, lightweighting during the use phase, particularly for components designed for transportation systems.

'''Practical implications:''' The research aims to
push forward the debate about the proposal of new environmental-conscious decision-support tools, in addition to those based on productivity and costs, to be integrated at the production design phase.

'''Full reference:''' PRIARONE, Paolo C., et al. The role of re-design for Additive Manufacturing on the process environmental performance. Procedia CIRP, 2018, 69: 124-129.

'''Link:''' https://www.sciencedirect.com/science/article/pii/S2212827117308193

'''Grafical abstract:''' Energy, CO2 emissions, and material qualitative flows for the AM and machining based approach.

[[File:Env performance.png|miniatura|centro]]

[[Utente:ElisaSimonetti|ElisaSimonetti]]

Validation study of an analytical model of FDM accuracy

2020-02-03T12:01:35Z

ElisaSimonetti:

'''Title(original):''' Validation study of an analytical model of FDM accuracy

'''Authors:''' G. Percoco, L. M. Galantucci, F. Lavecchia.

'''Keyword:''' Fused deposition modelling; Rapid prototyping; Assembly.

'''Purpose:''' Influence of working parameters on FDM dimensional accuracy, paying particular attention to variables that can affect axial symmetric mating between parts, and how these parameters can be set to improve the mating process.

'''Methodology:''' In this paper the fabrication tolerances of FDM prototypes have been studied using an experimental approach, oriented to shaft-hole mating. The experimentation has been conducted on two levels, the first one to verify a theoretical approach found in literature that showed to be adequate essentially for work-pieces fabricated with the solid strategy and without cavities. As a consequence, the second experimental level was conducted to identify factors influencing the accuracy of production of workpieces with cavities and sparse deposition strategies.

'''Findings:''' Hollow parts resulted to be influenced essentially by the size of the hole, whereas the shafts were not affected by the size, probably due to a correct application of the shrinkage correction factor. A shrinkage model from literature has been tested giving correct results with solid parts but poor results for hollow and sparse parts.

'''Practical implications:''' additive Manufacturing (AM) techniques are well known throughout the world and are often used in the manufacturing of products, as they help to significantly reduce time to market. Fused Deposition Modelling method is particularly interesting because it extrudes mainly recyclable thermoplastics, thus addressing the growing concern about the environment. Among the extrudable materials, one of the most widely employed is ABS, which is ideal for conceptual prototyping through design verification, and is available in a variety of standard and custom colours. Manufactured items ready for shipment and sale may be the final product, or sub‐assembly, or components that must be assembled together.

'''Full reference:''' PERCOCO, G.; GALANTUCCI, L. M.; LAVECCHIA, F. Validation study of an analytical model of FDM accuracy. DAAAM International Scientific Book, 2011, 585-592.

'''Link:''' https://www.daaam.info/Downloads/Pdfs/science_books_pdfs/2011/Sc_Book_2011-048.pdf

[[Utente:ElisaSimonetti|ElisaSimonetti]]

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

2020-02-03T11:56:09Z

ElisaSimonetti:

'''Title:''' The role of re-design for Additive Manufacturing on the process environmental performance.

'''Authors:''' P. C. Priarone, G. Ingarao, V. Lunetto, R. Di Lorenzo, L. Settineri.

'''Keywords:''' Sustainability; Additive Manufacturing; Life Cycle Assessment; Energy demand.

'''Purpose:''' At present, economic and technological design criteria for products and processes should be matched with the minimization of environmental
impact objectives. Manufacturing, material production, and product design are strictly connected stages. The choice of a production system
over another could result in significant material and energy/resource savings, particularly if the component has been properly designed for
manufacturing. In this scenario, Additive Manufacturing, which has been identified as a potential disruptive technology, gained an increasing
interest for the creation of complex metal parts. The paper focuses on the tools, based on the holistic modelling of additive and subtractive
approaches, which could be used to identify the production route allowing the lowest energy demand or CO2 emissions.

'''Methodology:''' Two different production approaches, based either on machining or additive manufacturing, have been assessed. An analysis has been adopted to quantify the primary energy demand and the CO2 emissions related to the life cycle of the components. A single part has been assumed as functional unit. The impacts of material production, part manufacturing, use, and disposal have been included, while the transportation-related
impact has been excluded. One of the key differences between the two approaches could be traced back to the masses of produced parts. The re-design for AM could lead to a reduction of the mass of the additively manufactured component while ensuring the same in-work performance of conventionally machined products.

'''Findings:''' The main results confirm that AM could be an environmental-friendly choice when allowing the same in-use performance, a better efficiency in raw material usage, lightweighting during the use phase, particularly for components designed for transportation systems.

'''Practical implications:''' The research aims to
push forward the debate about the proposal of new environmental-conscious decision-support tools, in addition to those based on productivity and costs, to be integrated at the production design phase.

'''Full reference:''' PRIARONE, Paolo C., et al. The role of re-design for Additive Manufacturing on the process environmental performance. Procedia CIRP, 2018, 69: 124-129.

'''Link:''' https://www.sciencedirect.com/science/article/pii/S2212827117308193

'''Grafical abstract:''' Energy, CO2 emissions, and material qualitative flows for the AM and machining based approach.

[[File:Env performance.png|miniatura|centro]]

[[Utente:ElisaSimonetti|ElisaSimonetti]]

Environmental and economic comparison between WAAM and machining

2020-02-03T11:55:49Z

ElisaSimonetti:

'''Title (original):''' A modelling framework for comparing the environmental and economic performance of WAAM-based integrated manufacturing and machining.

'''Authors:''' P. C. Priarone, G. Campatelli, F. Montevecchi, G. Venturini, L. Settineri.

'''Keywords:''' Sustainable development; Additive Manufacturing; Machining.

'''Purpose:''' Additive Manufacturing has proved to be suitable for supporting or even replacing traditional manufacturing approaches in some industrial contexts. Among the various processes that can be used to produce metal parts, Wire Arc Additive Manufacturing (WAAM) is known to be an economically convenient, welding-based direct energy deposition technique for large parts with reduced complexity. The present paper proposes a structured modelling framework to assess whether WAAM could successfully substitute machining processes. The costs, manufacturing times, energy demand and carbon footprint are considered.

'''Methodology:''' WAAM is a welding-based technique that is suitable for producing three-dimensional geometries, layer-by-layer. A substrate to build the part on is needed. For this purpose, one industrial best practice is the use of simple-shaped portions of the final component, previously manufactured by means of other processes (such as machining). This strategy can prevent the detachment of the additively manufactured part from the base plate, and allows conventional technologies to be used to produce the massive features. However, this also implies the need of several manufacturing steps with different material feedstocks. In addition, a post-AM finishing process is required, since the quality of the as-deposited surfaces is low. A framework that can be used to assess and compare the performance of a WAAM-based approach and machining has been proposed.

'''Findings:''' The methodology has proved to be suitable for identifying whether WAAM could successfully substitute machining processes. Even if the conclusions are limited to the considered part under investigation (which did not need support structures to be built), the integrated approach appears to be favourable towards environmental stress, when it is possible to exploit its superior efficiency for raw material usage, even at the expense of higher processing times and costs.

'''Practical implications:''' Industries adopt WAAM for the high productivity and the speed of realization of the manufacture article with unparalleled efficiency and cost advantages in the production of large parts.

'''Full reference:''' PRIARONE, Paolo C., et al. A modelling framework for comparing the environmental and economic performance of WAAM-based integrated manufacturing and machining. CIRP Annals, 2019.

'''Link:''' https://www.sciencedirect.com/science/article/pii/S0007850619300319

'''Grafical abstract:''' Unit processes and main qualitative flows of the WAAM-based integrated manufacturing approach.

[[File:Waamimage.png|miniatura|centro]]

[[Utente:ElisaSimonetti|ElisaSimonetti]]

Validation study of an analytical model of FDM accuracy

2020-02-03T11:55:27Z

ElisaSimonetti:

'''Title(original):''' Validation study of an analytical model of FDM accuracy

'''Authors:''' G. Percoco, L. M. Galantucci, F. Lavecchia.

'''Keyword:''' Fused deposition modelling; Rapid prototyping; Assembly.

'''Purpose:''' The diffusion of Additive Manufacturing technologies is leading to new needs in industrial research and development sectors. In particular, mating additive manufactured parts is not a simple task, due to the poor accuracy of several additive technologies, such as Fused Deposition Modelling (FDM). Several papers are focused on studies of how FDM accuracy is affected by process parameters. In this paper the authors report a study of the influence of working parameters on FDM dimensional accuracy, paying particular attention to variables that can affect axial symmetric mating between parts, and how these parameters can be set to improve the mating process.

'''Methodology:''' In this paper the fabrication tolerances of FDM prototypes have been studied using an experimental approach, oriented to shaft-hole mating. The experimentation has been conducted on two levels, the first one to verify a theoretical approach found in literature that showed to be adequate essentially for work-pieces fabricated with the solid strategy and without cavities. As a consequence, the second experimental level was conducted to identify factors influencing the accuracy of production of workpieces with cavities and sparse deposition strategies.

'''Findings:''' Hollow parts resulted to be influenced essentially by the size of the hole, whereas the shafts were not affected by the size, probably due to a correct application of the shrinkage correction factor. A shrinkage model from literature has been tested giving correct results with solid parts but poor results for hollow and sparse parts.

'''Practical implications:''' additive Manufacturing (AM) techniques are well known throughout the world and are often used in the manufacturing of products, as they help to significantly reduce time to market. Fused Deposition Modelling method is particularly interesting because it extrudes mainly recyclable thermoplastics, thus addressing the growing concern about the environment. Among the extrudable materials, one of the most widely employed is ABS, which is ideal for conceptual prototyping through design verification, and is available in a variety of standard and custom colours. Manufactured items ready for shipment and sale may be the final product, or sub‐assembly, or components that must be assembled together.

'''Full reference:''' PERCOCO, G.; GALANTUCCI, L. M.; LAVECCHIA, F. Validation study of an analytical model of FDM accuracy. DAAAM International Scientific Book, 2011, 585-592.

'''Link:''' https://www.daaam.info/Downloads/Pdfs/science_books_pdfs/2011/Sc_Book_2011-048.pdf

'''Grafical abstract:''' Working representation of FDM

[[File:Fdm.jpg|miniatura|centro]]

[[Utente:ElisaSimonetti|ElisaSimonetti]]

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

2020-01-21T12:40:45Z

ElisaSimonetti:

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

2020-01-21T12:14:09Z

ElisaSimonetti:

'''Title:''' The role of re-design for Additive Manufacturing on the process environmental performance.

'''Authors:''' P. C. Priarone, G. Ingarao, V. Lunetto, R. Di Lorenzo, L. Settineri.

'''Keywords:''' Sustainability; Additive Manufacturing; Life Cycle Assessment; Energy demand.

'''Purpose:''' At present, economic and technological design criteria for products and processes should be matched with the minimization of environmental
impact objectives. Manufacturing, material production, and product design are strictly connected stages. The choice of a production system
over another could result in significant material and energy/resource savings, particularly if the component has been properly designed for
manufacturing. In this scenario, Additive Manufacturing, which has been identified as a potential disruptive technology, gained an increasing
interest for the creation of complex metal parts. The paper focuses on the tools, based on the holistic modelling of additive and subtractive
approaches, which could be used to identify the production route allowing the lowest energy demand or CO2 emissions.

'''Methodology:''' Two different production approaches, based either on machining or additive manufacturing, have been assessed. An analysis has been adopted to quantify the primary energy demand and the CO2 emissions related to the life cycle of the components. A single part has been assumed as functional unit. The impacts of material production, part manufacturing, use, and disposal have been included, while the transportation-related
impact has been excluded. One of the key differences between the two approaches could be traced back to the masses of produced parts. The re-design for AM could lead to a reduction of the mass of the additively manufactured component while ensuring the same in-work performance of conventionally machined products.

'''Findings:''' The main results confirm that AM could be an environmental-friendly choice when allowing the same in-use performance, a better efficiency in raw material usage, lightweighting during the use phase, particularly for components designed for transportation systems. The research aims to
push forward the debate about the proposal of new environmental-conscious decision-support tools, in addition to those based on productivity and costs, to be integrated at the production design phase.

'''Practical implications:'''

'''Full reference:''' PRIARONE, Paolo C., et al. The role of re-design for Additive Manufacturing on the process environmental performance. Procedia CIRP, 2018, 69: 124-129.

'''Link:''' https://www.sciencedirect.com/science/article/pii/S2212827117308193

'''Grafical abstract:''' Energy, CO2 emissions, and material qualitative flows for the AM and machining based approach.

[[File:Env performance.png|miniatura|centro]]

Design for manufactoring

2020-01-21T12:09:28Z

ElisaSimonetti:

[[Post processing]]

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

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

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

2020-01-21T11:54:41Z

ElisaSimonetti: Creata pagina con "'''Title:''' The role of re-design for Additive Manufacturing on the process environmental performance. '''Authors:''' P. C. Priarone, G. Ingarao, V. Lunetto, R. Di Lorenzo, L..."

'''Title:''' The role of re-design for Additive Manufacturing on the process environmental performance.
'''Authors:''' P. C. Priarone, G. Ingarao, V. Lunetto, R. Di Lorenzo, L. Settineri.

'''Keywords:''' Sustainability; Additive Manufacturing; Life Cycle Assessment; Energy demand.

'''Purpose:''' At present, economic and technological design criteria for products and processes should be matched with the minimization of environmental
impact objectives. Manufacturing, material production, and product design are strictly connected stages. The choice of a production system
over another could result in significant material and energy/resource savings, particularly if the component has been properly designed for
manufacturing. In this scenario, Additive Manufacturing, which has been identified as a potential disruptive technology, gained an increasing
interest for the creation of complex metal parts. The paper focuses on the tools, based on the holistic modelling of additive and subtractive
approaches, which could be used to identify the production route allowing the lowest energy demand or CO2 emissions.

'''Methodology:''' Two different production approaches, based either on machining or additive manufacturing, have been assessed. An analysis has been adopted to quantify the primary energy demand and the CO2 emissions related to the life cycle of the components. A single part has been assumed as functional unit. The impacts of material production, part manufacturing, use, and disposal have been included, while the transportation-related
impact has been excluded. One of the key differences between the two approaches could be traced back to the masses of produced parts. The re-design for AM could lead to a reduction of the mass of the additively manufactured component while ensuring the same in-work performance of conventionally machined products.

'''Findings:''' The main results confirm that AM could be an environmental-friendly choice when allowing the same in-use performance, a better efficiency in raw material usage, lightweighting during the use phase, particularly for components designed for transportation systems. The research aims to
push forward the debate about the proposal of new environmental-conscious decision-support tools, in addition to those based on productivity and costs, to be integrated at the production design phase.

'''Practical implications:'''

'''Full reference:''' PRIARONE, Paolo C., et al. The role of re-design for Additive Manufacturing on the process environmental performance. Procedia CIRP, 2018, 69: 124-129.

'''Link:''' https://www.sciencedirect.com/science/article/pii/S2212827117308193

'''Grafical abstract:''' Energy, CO2 emissions, and material qualitative flows for the AM and machining based approach.

[[File:Env performance.png|miniatura|centro]]

File:Env performance.png

2020-01-21T11:47:20Z

ElisaSimonetti:

Energy, CO2 emissions, and material qualitative flows for the AM and machining based approach.

Fused Deposition Modeling

2020-01-19T18:50:12Z

ElisaSimonetti:

[[Education]]

[[Design for manufactoring]]

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

Fused Deposition Modeling

2020-01-19T18:49:55Z

ElisaSimonetti:

[[Education]]
[[Design for manufactoring]]
[[Validation study of an analytical model of FDM accuracy]]

Validation study of an analytical model of FDM accuracy

2020-01-19T18:49:14Z

ElisaSimonetti: Creata pagina con "'''Title(original):''' Validation study of an analytical model of FDM accuracy '''Authors:''' G. Percoco, L. M. Galantucci, F. Lavecchia. '''Keyword:''' Fused deposition mod..."

'''Title(original):''' Validation study of an analytical model of FDM accuracy

'''Authors:''' G. Percoco, L. M. Galantucci, F. Lavecchia.

'''Keyword:''' Fused deposition modelling; Rapid prototyping; Assembly.

'''Purpose:''' The diffusion of Additive Manufacturing technologies is leading to new needs in industrial research and development sectors. In particular, mating additive manufactured parts is not a simple task, due to the poor accuracy of several additive technologies, such as Fused Deposition Modelling (FDM). Several papers are focused on studies of how FDM accuracy is affected by process parameters. In this paper the authors report a study of the influence of working parameters on FDM dimensional accuracy, paying particular attention to variables that can affect axial symmetric mating between parts, and how these parameters can be set to improve the mating process.

'''Methodology:''' In this paper the fabrication tolerances of FDM prototypes have been studied using an experimental approach, oriented to shaft-hole mating. The experimentation has been conducted on two levels, the first one to verify a theoretical approach found in literature that showed to be adequate essentially for work-pieces fabricated with the solid strategy and without cavities. As a consequence, the second experimental level was conducted to identify factors influencing the accuracy of production of workpieces with cavities and sparse deposition strategies.

'''Findings:''' Hollow parts resulted to be influenced essentially by the size of the hole, whereas the shafts were not affected by the size, probably due to a correct application of the shrinkage correction factor. A shrinkage model from literature has been tested giving correct results with solid parts but poor results for hollow and sparse parts.

'''Practical implications:''' additive Manufacturing (AM) techniques are well known throughout the world and are often used in the manufacturing of products, as they help to significantly reduce time to market. Fused Deposition Modelling method is particularly interesting because it extrudes mainly recyclable thermoplastics, thus addressing the growing concern about the environment. Among the extrudable materials, one of the most widely employed is ABS, which is ideal for conceptual prototyping through design verification, and is available in a variety of standard and custom colours. Manufactured items ready for shipment and sale may be the final product, or sub‐assembly, or components that must be assembled together.

'''Full reference:''' PERCOCO, G.; GALANTUCCI, L. M.; LAVECCHIA, F. Validation study of an analytical model of FDM accuracy. DAAAM International Scientific Book, 2011, 585-592.

'''Link:''' https://www.daaam.info/Downloads/Pdfs/science_books_pdfs/2011/Sc_Book_2011-048.pdf

'''Grafical abstract:''' Working representation of FDM

[[File:Fdm.jpg|miniatura|centro]]

File:Fdm.jpg

2020-01-19T18:48:17Z

ElisaSimonetti:

Working representation of FDM

Environmental and economic comparison between WAAM and machining

2020-01-19T18:34:52Z

ElisaSimonetti:

Utente:ElisaSimonetti

2020-01-19T18:28:51Z

ElisaSimonetti: Pagina svuotata

Environmental and economic comparison between WAAM and machining

2020-01-19T18:27:44Z

ElisaSimonetti:

'''Title (original):''' A modelling framework for comparing the environmental and economic performance of WAAM-based integrated manufacturing and machining.

'''Authors:''' P. C. Priarone, G. Campatelli, F. Montevecchi, G. Venturini, L. Settineri.

'''Keywords:''' Sustainable development; Additive Manufacturing; Machining.

'''Purpose:''' Additive Manufacturing has proved to be suitable for supporting or even replacing traditional manufacturing approaches in some industrial contexts. Among the various processes that can be used to produce metal parts, Wire Arc Additive Manufacturing (WAAM) is known to be an economically convenient, welding-based direct energy deposition technique for large parts with reduced complexity. The present paper proposes a structured modelling framework to assess whether WAAM could successfully substitute machining processes. The costs, manufacturing times, energy demand and carbon footprint are considered.

'''Methodology:''' WAAM is a welding-based technique that is suitable for producing three-dimensional geometries, layer-by-layer. A substrate to build the part on is needed. For this purpose, one industrial best practice is the use of simple-shaped portions of the final component, previously manufactured by means of other processes (such as machining). This strategy can prevent the detachment of the additively manufactured part from the base plate, and allows conventional technologies to be used to produce the massive features. However, this also implies the need of several manufacturing steps with different material feedstocks. In addition, a post-AM finishing process is required, since the quality of the as-deposited surfaces is low. A framework that can be used to assess and compare the performance of a WAAM-based approach and machining has been proposed.

'''Findings:''' The methodology has proved to be suitable for identifying whether WAAM could successfully substitute machining processes. Even if the conclusions are limited to the considered part under investigation (which did not need support structures to be built), the integrated approach appears to be favourable towards environmental stress, when it is possible to exploit its superior efficiency for raw material usage, even at the expense of higher processing times and costs.

Practical implications: Industries adopt WAAM for the high productivity and the speed of realization of the manufacture article with unparalleled efficiency and cost advantages in the production of large parts.

'''Full reference:''' PRIARONE, Paolo C., et al. A modelling framework for comparing the environmental and economic performance of WAAM-based integrated manufacturing and machining. CIRP Annals, 2019.

'''Link:''' https://www.sciencedirect.com/science/article/pii/S0007850619300319

'''Grafical abstract:''' Unit processes and main qualitative flows of the WAAM-based integrated manufacturing approach.

[[File:Waamimage.png|miniatura|centro]]

Environmental and economic comparison between WAAM and machining

2020-01-19T18:27:29Z

ElisaSimonetti:

'''Title (original):''' A modelling framework for comparing the environmental and economic performance of WAAM-based integrated manufacturing and machining.

'''Authors:''' P. C. Priarone, G. Campatelli, F. Montevecchi, G. Venturini, L. Settineri.

'''Keywords:''' Sustainable development; Additive Manufacturing; Machining.

'''Purpose:''' Additive Manufacturing has proved to be suitable for supporting or even replacing traditional manufacturing approaches in some industrial contexts. Among the various processes that can be used to produce metal parts, Wire Arc Additive Manufacturing (WAAM) is known to be an economically convenient, welding-based direct energy deposition technique for large parts with reduced complexity. The present paper proposes a structured modelling framework to assess whether WAAM could successfully substitute machining processes. The costs, manufacturing times, energy demand and carbon footprint are considered.

'''Methodology:''' WAAM is a welding-based technique that is suitable for producing three-dimensional geometries, layer-by-layer. A substrate to build the part on is needed. For this purpose, one industrial best practice is the use of simple-shaped portions of the final component, previously manufactured by means of other processes (such as machining). This strategy can prevent the detachment of the additively manufactured part from the base plate, and allows conventional technologies to be used to produce the massive features. However, this also implies the need of several manufacturing steps with different material feedstocks. In addition, a post-AM finishing process is required, since the quality of the as-deposited surfaces is low. A framework that can be used to assess and compare the performance of a WAAM-based approach and machining has been proposed.

'''Findings:''' The methodology has proved to be suitable for identifying whether WAAM could successfully substitute machining processes. Even if the conclusions are limited to the considered part under investigation (which did not need support structures to be built), the integrated approach appears to be favourable towards environmental stress, when it is possible to exploit its superior efficiency for raw material usage, even at the expense of higher processing times and costs.

Practical implications: Industries adopt WAAM for the high productivity and the speed of realization of the manufacture article with unparalleled efficiency and cost advantages in the production of large parts.

'''Full reference:''' PRIARONE, Paolo C., et al. A modelling framework for comparing the environmental and economic performance of WAAM-based integrated manufacturing and machining. CIRP Annals, 2019.

'''Link:''' https://www.sciencedirect.com/science/article/pii/S0007850619300319

'''Grafical abstract:''' Unit processes and main qualitative flows of the WAAM-based integrated manufacturing approach.

[[File:Waamimage.png|miniatura|centro]]

Wire Arc Additive Manifacturing

2020-01-19T18:26:12Z

ElisaSimonetti:

*[[Finite element modelling of Wire-Arc-Additive-Manufacturing process]]
*[[Selection of optimal process parameters for wire arc additive manufacturing]]
*[[Cutting forces analysis in additive manufactured AISI H13 alloy]]
*[[Environmental and economic comparison between WAAM and machining]]

Environmental and economic comparison between WAAM and machining

2020-01-19T18:18:16Z

ElisaSimonetti: Creata pagina con "'''Title (original):''' A modelling framework for comparing the environmental and economic performance of WAAM-based integrated manufacturing and machining. '''Authors:''' P...."

'''Title (original):''' A modelling framework for comparing the environmental and economic performance of WAAM-based integrated manufacturing and machining.

'''Authors:''' P. C. Priarone, G. Campatelli, F. Montevecchi, G. Venturini, L. Settineri.

'''Keywords:''' Sustainable development; Additive Manufacturing; Machining.

'''Purpose:''' Additive Manufacturing has proved to be suitable for supporting or even replacing traditional manufacturing approaches in some industrial contexts. Among the various processes that can be used to produce metal parts, Wire Arc Additive Manufacturing (WAAM) is known to be an economically convenient, welding-based direct energy deposition technique for large parts with reduced complexity. The present paper proposes a structured modelling framework to assess whether WAAM could successfully substitute machining processes. The costs, manufacturing times, energy demand and carbon footprint are considered.

'''Methodology:''' WAAM is a welding-based technique that is suitable for producing three-dimensional geometries, layer-by-layer. A substrate to build the part on is needed. For this purpose, one industrial best practice is the use of simple-shaped portions of the final component, previously manufactured by means of other processes (such as machining). This strategy can prevent the detachment of the additively manufactured part from the base plate, and allows conventional technologies to be used to produce the massive features. However, this also implies the need of several manufacturing steps with different material feedstocks. In addition, a post-AM finishing process is required, since the quality of the as-deposited surfaces is low. A framework that can be used to assess and compare the performance of a WAAM-based approach and machining has been proposed.

'''Findings:''' The methodology has proved to be suitable for identifying whether WAAM could successfully substitute machining processes. Even if the conclusions are limited to the considered part under investigation (which did not need support structures to be built), the integrated approach appears to be favourable towards environmental stress, when it is possible to exploit its superior efficiency for raw material usage, even at the expense of higher processing times and costs.

Practical implications: Industries adopt WAAM for the high productivity and the speed of realization of the manufacture article with unparalleled efficiency and cost advantages in the production of large parts.

'''Full reference:''' PRIARONE, Paolo C., et al. A modelling framework for comparing the environmental and economic performance of WAAM-based integrated manufacturing and machining. CIRP Annals, 2019.

'''Link:''' https://www.sciencedirect.com/science/article/pii/S0007850619300319

'''Grafical abstract:'''

[[File:Waamimage.png|miniatura|centro]]

Utente:ElisaSimonetti

2020-01-19T17:50:56Z

'''Title (original):''' A modelling framework for comparing the environmental and economic performance of WAAM-based integrated manufacturing and machining

'''Authors:''' P. C. Priarone, G. Campatelli, F. Montevecchi, G. Venturini, L. Settineri

'''Keywords:''' Sustainable development; Additive Manufacturing; Machining

'''Purpose:''' The purpose of this paper is to asses whether WAAM could successfully substitute machining processes. The costs, manufacturing times, energy demand and carbon footprint are considered.

'''Methodology:''' WAAM is a welding-based technique that is suitable for producing three-dimensional geometries, layer-by-layer. A substrate to build the part on is needed. For this purpose, one industrial best practice is the use of simple-shaped portions of the final component, previously manufactured by means of other processes (such as machining). This strategy can prevent the detachment of the additively manufactured part from the base plate, and allows conventional technologies to be used to produce the massive features. However, this also implies the need of several manufacturing steps with different material feedstocks. In addition, a post-AM finishing process is required, since the quality of the as-deposited surfaces is low. A framework that can be used to assess and compare the performance of a WAAM-based approach and machining has been proposed.

'''Findings:''' The methodology has proved to be suitable for identifying whether WAAM could successfully substitute machining processes. Even if the conclusions are limited to the considered part under investigation (which did not need support structures to be built), the integrated approach appears to be favourable towards environmental stress, when it is possible to exploit its superior efficiency for raw material usage, even at the expense of higher processing times and costs.

'''Practical implications:''' Industries adopt WAAM for the high productivity and the speed of realization of the manufacture article with unparalleled efficiency and cost advantages in the production of large parts.

'''Full reference:''' PRIARONE, Paolo C., et al. A modelling framework for comparing the environmental and economic performance of WAAM-based integrated manufacturing and machining. CIRP Annals, 2019.

'''Link:''' https://www.sciencedirect.com/science/article/pii/S0007850619300319

'''Grafical abstract:''' Unit processes and main qualitative flows of the WAAM-based integrated manufacturing approach.

[[File:Waamimage.png|miniatura|centro]]

File:Waamimage.png

2020-01-19T17:33:51Z

ElisaSimonetti:

Unit processes and main qualitative flows of the WAAM-based integrated manufacturing approach.

File:Waam.jpg

2020-01-19T17:06:48Z

ElisaSimonetti:

Unit processes and main qualitative flows of the WAAM-based integrated manufacturing approach.

File:Fig.png

2020-01-19T17:04:28Z

ElisaSimonetti:

Unit processes and main qualitative flows of the WAAM-based integrated manufacturing approach.