Design for manufacturing of surfaces to improve accuracy - Cronologia

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SaraCozzani: Creata pagina con "'''Title:''' Design for manufacturing of surfaces to improve accuracy in Fused Deposition Modeling '''Authors and full affiliations:''' Alberto Boschetto, Luana Bottini,..."

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Creata pagina con "'''Title:''' Design for manufacturing of surfaces to improve accuracy in Fused Deposition Modeling '''Authors and full affiliations:''' Alberto Boschetto, Luana Bottini,..."

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'''Title:''' Design for manufacturing of surfaces to improve accuracy in Fused Deposition Modeling

'''Authors and full affiliations:''' Alberto Boschetto, Luana Bottini, ''Department of Mechanical and Aerospace Engineering, University of Rome La Sapienza, Via Eudossiana 18, 00184 Rome, Italy .''

'''Keywords:''' Fused Deposition Modeling; Accuracy improvement; Design for manufacturing .

'''Purpose:''' The aim of this work is the development of a virtual model preprocessing in order to compensate for the deterministic behavior found in the Fused Decomposition Modeling.

'''Methodology:''' The idea, in order to compensate the deterministic dimensional deviation introduced during the physical fabrication, is to offset this starting surface by considering a sphere R in radius around the generic point P. The offset surface is generated as the envelope of all the spheres centered in each point of the surface. This mathematical operation corresponds to the displacement by R of the point P along the normal . Starting from the equation of a generic point of the offset surface by doing various calculations, which are found in the whole article, we arrive at the final formulation . The application of this equation to all the surface points allows obtaining a deformed model that permits to compensate the deviations introduced by the physical fabrication. Then the abovementioned methodology has been applied to three case studies: a cylinder, a spherical joint and a fan blade.

'''Benefits:''' With this method it’s no necessary to fabricate artifact and perform measurement in order to gain the model information and it can be directly used before CAM environment.

'''Findings:''' All the components have been defined by mathematical formulations and fabricated before and after the application of the methodology. The performed dimensional measurements pointed out a marked reduction of the dimensional deviations after the DFM: both for simple and complex geometries the pre-processing of the virtual model permitted to obtain dimensional values very close to nominal ones.

'''Grafical Abstract:''' [[File:Image3.png|centro|miniatura]]

'''Full reference:''' Alberto Boschetto, Luana Bottini, Design for manufacturing of surfaces to improve accuracy in Fused Deposition Modeling, ''Robotics and Computer-Integrated Manufacturing'' , Volume 37, February 2016, Pages 103-114.

'''Link:''' https://www.sciencedirect.com/science/article/abs/pii/S0736584515000848

@@ Riga 5: / Riga 5: @@
 '''Keywords:'''  Fused Deposition Modeling; Accuracy improvement; Design for manufacturing .
-'''Purpose:''' The aim of this work is the development of a virtual model preprocessing in order to compensate for the deterministic behavior found in the Fused Deposition Modeling.
+'''Purpose:''' The aim of this work is the development of a virtual model preprocessing in order to compensate the deviations introduced by the physical fabrication found in the Fused Deposition Modeling.
 '''Methodology:'''  The idea, in order to compensate the deterministic dimensional deviation introduced during the physical fabrication, is to offset this starting surface by considering a sphere R in radius around the generic point P. The offset surface is generated as the envelope of all the spheres centered in each point of the surface. This mathematical operation corresponds to the displacement by R of the point P along the normal . Starting from the equation of a generic point of the offset surface by doing various calculations, which are found in the whole article, we arrive at the final formulation . The application of this equation to all the surface points allows obtaining a deformed model that permits to compensate the deviations introduced by the physical fabrication. Then the abovementioned methodology has been applied to three case studies: a cylinder, a spherical joint and a fan blade.

@@ Riga 9: / Riga 9: @@
 '''Methodology:'''  The idea, in order to compensate the deterministic dimensional deviation introduced during the physical fabrication, is to offset this starting surface by considering a sphere R in radius around the generic point P. The offset surface is generated as the envelope of all the spheres centered in each point of the surface. This mathematical operation corresponds to the displacement by R of the point P along the normal . Starting from the equation of a generic point of the offset surface by doing various calculations, which are found in the whole article, we arrive at the final formulation . The application of this equation to all the surface points allows obtaining a deformed model that permits to compensate the deviations introduced by the physical fabrication. Then the abovementioned methodology has been applied to three case studies: a cylinder, a spherical joint and a fan blade.
-'''Benefits:''' With this method it’s no necessary to fabricate artifact and perform measurement in order to gain the model information and it can be directly used before CAM environment.
+'''Benefits:''' With this method it’s no necessary to correct and perform measurement in order to gain the model information and it can be directly used before CAM environment.
 '''Findings:''' All the components have been defined by mathematical formulations and fabricated before and after the application of the methodology. The performed dimensional measurements pointed out a marked reduction of the dimensional deviations after the DFM: both for simple and complex geometries the pre-processing of the virtual model permitted to obtain dimensional values very close to nominal ones.

@@ Riga 1: / Riga 1: @@
 '''Title:'''  Design for manufacturing of surfaces to improve accuracy in Fused Deposition Modeling
-'''Authors and full affiliations:'''   Alberto Boschetto, Luana Bottini, ''Department of Mechanical and Aerospace Engineering, University  of Rome La Sapienza, Via Eudossiana 18, 00184 Rome, Italy .''
+'''Authors and full affiliations:''' Alberto Boschetto, Luana Bottini, ''Department of Mechanical and Aerospace Engineering, University  of Rome La Sapienza, Via Eudossiana 18, 00184 Rome, Italy .''
-'''Keywords:'''  Selective laser melting (SLM), Cold spraying (CS), Functionally graded material (FGM), Additive manufacturing (AM), XRD, Grain microstructure .
+'''Purpose:''' The aim of this work is the development of a virtual model preprocessing in order to compensate for the deterministic behavior found in the Fused Decomposition Modeling.
-'''Abstract:''' A hybrid additive manufacturing technology for fabricating functionally graded materials (FGMs) is proposed in this paper. The new process represents a combination of two existing additive manufacturing processes, selective laser melting (SLM) and cold spraying (CS). The targeted experiment of Al and Al + Al2O3 deposited onto SLM Ti6Al4V via CS reveals that the hybrid additive manufacturing process can produce thick, dense and machinable FGMs composed of non-weldable metals without intermetallic phase formation at the multi-materials interface. The SLM Ti6Al4V part exhibited fully acicular martensitic microstructure in contrast with α + β microstructure in the Ti6Al4V feedstock, while the grain structure of the CS Al part had no significant change as compared with the Al feedstock. Due to the phase transformation of the SLM part and work hardening of the CS part, the overall hardness of the FMGs was higher than that of the feedstock.
+'''Methodology:'''  The idea, in order to compensate the deterministic dimensional deviation introduced during the physical fabrication, is to offset this starting surface by considering a sphere R in radius around the generic point P. The offset surface is generated as the envelope of all the spheres centered in each point of the surface. This mathematical operation corresponds to the displacement by R of the point P along the normal . Starting from the equation of a generic point of the offset surface by doing various calculations, which are found in the whole article, we arrive at the final formulation . The application of this equation to all the surface points allows obtaining a deformed model that permits to compensate the deviations introduced by the physical fabrication. Then the abovementioned methodology has been applied to three case studies: a cylinder, a spherical joint and a fan blade.
-'''Purpose:''' A hybrid AM technology combining SLM and CS is proposed in this work to fabricate metal-metal and metal matrix composite (MMC)-metal FGMs.
+'''Benefits:''' With this method it’s no necessary to fabricate artifact and perform measurement in order to gain the model information and it can be directly used before CAM environment.
-'''Findings:''' The hybrid additive manufacturing process effectively prevented the brittle intermetallic phase formation at the connecting interface, producing thick, dense and machinable FGMs composited of non-weldable metals.
+'''Findings:''' All the components have been defined by mathematical formulations and fabricated before and after the application of the methodology. The performed dimensional measurements pointed out a marked reduction of the dimensional deviations after the DFM: both for simple and complex geometries the pre-processing of the virtual model permitted to obtain dimensional values very close to nominal ones.
-'''Grafical Abstract:''' [[https://www.sciencedirect.com/science/article/pii/S0924013618300165#sec0010]]
+'''Grafical Abstract:''' [[File:Image3.png|centro|miniatura]]
-'''Full reference:''' H. Assadi, H. Kreye, F. Gärtner, T. Klassen Cold spraying – A materials perspective,
+'''Full reference:''' Alberto Boschetto, Luana Bottini, Design for manufacturing of surfaces to improve accuracy in Fused Deposition Modeling, ''Robotics and Computer-Integrated Manufacturing'' , Volume 37, February 2016, Pages 103-114.
-'''Link:'''  https://www.sciencedirect.com/science/article/pii/S0924013618300165#sec0010
+'''Link:'''  https://www.sciencedirect.com/science/article/abs/pii/S0736584515000848