Prediction and visualization of achievable orientation tolerances for additive manufacturing

Budinoff, Hannah D.; McMains, Sara

doi:10.1016/j.procir.2018.03.315

Cited by 17 publications

(9 citation statements)

References 10 publications

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“…The tolerance zone of the TOP control is cylindrical [102]. Figure 12a shows a three-dimensional column where the TOP control has been applied (related to Tolerance Problem 6).…”

Section: Tolerance Of Position (Top)mentioning

confidence: 99%

Deploying Geometric Dimensioning and Tolerancing in Construction

Talebi¹,

Koskela²,

Tzortzopoulos³

et al. 2020

Buildings

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No standardised approach appears to exist in the architecture, engineering, and construction (AEC) industry for the communication of tolerance information on drawings. As a result of this shortcoming, defects associated with dimensional and geometric variability occur with potentially severe consequences. In contrast, in mechanical engineering, geometric dimensioning and tolerancing (GD&T) is a symbolic language widely used to communicate both the perfect geometry and the tolerances of components and assemblies. This paper prescribes the application of GD&T in construction with the goal of developing a common language called geometric dimensioning and tolerancing in construction (GD&TIC) to facilitate the communication of tolerance information throughout design and construction. design science research is the adopted methodological approach. Evidence was collated from direct observations in two construction projects and two group interviews. A focus group meeting was conducted to evaluate whether the developed solution (GD&TIC) fulfilled its aim. The contribution of this paper to designers, to organisations involved in developing AEC industry standards, and to the scholarly community is twofold: (1) It is an attempt to develop a standardised approach (GD&TIC) for the communication of tolerance information in AEC, and (2) it identifies discrepancies between GD&TIC rules and some of the commonly used American and British standards on tolerances.

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“…The tolerance zone of the TOP control is cylindrical [102]. Figure 12a shows a three-dimensional column where the TOP control has been applied (related to Tolerance Problem 6).…”

Section: Tolerance Of Position (Top)mentioning

confidence: 99%

Deploying Geometric Dimensioning and Tolerancing in Construction

Talebi¹,

Koskela²,

Tzortzopoulos³

et al. 2020

Buildings

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“…These functions naturally produce parallel planar slices of M in the z-direction, and they can be generalized to any direction v ∈ R 3 by applying a 3D rotation to the input mesh. Standard triangle/plane intersection algorithms are used to compute the level sets of f [5][6][7][8][9][10][11][12], which in most cases are assumed to produce closed (and oriented) 2-manifold contours. Adaptive slicing algorithms introduce techniques to compute non-uniformly spaced slicing planes [13][14][15].…”

Section: Parallel-planes Mesh Slicingmentioning

confidence: 99%

Level Sets of Weak-Morse Functions for Triangular Mesh Slicing

et al. 2020

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In the context of CAD CAM CAE (Computer-Aided Design, Manufacturing and Engineering) and Additive Manufacturing, the computation of level sets of closed 2-manifold triangular meshes (mesh slicing) is relevant for the generation of 3D printing patterns. Current slicing methods rely on the assumption that the function used to compute the level sets satisfies strong Morse conditions, rendering incorrect results when such a function is not a Morse one. To overcome this limitation, this manuscript presents an algorithm for the computation of mesh level sets under the presence of non-Morse degeneracies. To accomplish this, our method defines weak-Morse conditions, and presents a characterization of the possible types of degeneracies. This classification relies on the position of vertices, edges and faces in the neighborhood outside of the slicing plane. Finally, our algorithm produces oriented 1-manifold contours. Each contour orientation defines whether it belongs to a hole or to an external border. This definition is central for Additive Manufacturing purposes. We set up tests encompassing all known non-Morse degeneracies. Our algorithm successfully processes every generated case. Ongoing work addresses (a) a theoretical proof of completeness for our algorithm, (b) implementation of interval trees to improve the algorithm efficiency and, (c) integration into an Additive Manufacturing framework for industry applications.

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“…Further methods are available in literature, but strictly dependent on the compatibility among the softwares and among the machines to describe the complex shapes starting from the surface information supplied in terms of control nodes [1,[12][13][14][15]. In fact, the control points or nodes when considered in a clear way can be effectively used to generate the desired surface in particular for CNC processing [5,[14][15][16]. If not, the meshing technique based on the triangulation is very useful because the list of nodes and the normal position can be better readable by different softwares and neglects some other not required information that are very important only ESAFORM 2021.…”

Section: Intr 1introduction Oductionmentioning

confidence: 99%

“…Instead, the Fused Deposition modelling is the most known technology in the field due to the simple mechanism of deposition characterized by the extrusion of a filament into a heated chamber in which the temperature can reach 250-300°C depending on the material. Immediately after the deposition due to the contact with layer previously deposited and to the lower temperature the filament tends to be solidified [16][17][18][19][20]. In such a way of course the maximum thickness of the layer can in general reach values higher than those obtained with the technology shown before, particularly when compact three-dimensional printers are used for testing purposes.…”

Section: Intr 1introduction Oductionmentioning

confidence: 99%

Integrating layer by layer manufacturing for the realization of polymer complex geometries with scanning devices: re-building by digital data

Bruni¹,

Greco²,

Mancia³

et al. 2021

Esaform 2021

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The additive manufacturing technique represents a way to realize components or prototypes without the use of conventional tools.The research presented aims at proposing a methodology based on the use of three different techniques that are the poly-jet 3D using UV photo-polymerization, the FDM of polyamide materials and the FDM of PLA materials. The original data were used at the beginning with the first technique in order to detect the shape and the geometry by a 3D SCANNER. The objective was the re-building of a model shape made using a procedure in which the input file characteristics were updated starting from those got by the scanning device in order to respect the original requirements defined in the computer aided environment. It was found that the physical re-building of an object is depending the characteristics of the input file that needs to be digitally processed in order to get the desired shape and geometry. In that way also FDM using PLA and polyamide materials can be utilized to get components or prototypes from scanned digital data. The results are reported in details.

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Prediction and visualization of achievable orientation tolerances for additive manufacturing

Cited by 17 publications

References 10 publications

Deploying Geometric Dimensioning and Tolerancing in Construction

Deploying Geometric Dimensioning and Tolerancing in Construction

Level Sets of Weak-Morse Functions for Triangular Mesh Slicing

Integrating layer by layer manufacturing for the realization of polymer complex geometries with scanning devices: re-building by digital data

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