Modifying additively manufactured part designs using topological analyses
AssigneeGenesee Valley Innovations, LLC
InventorsMorad Behandish, Saigopal Nelaturi
Life of this patent
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Abstract
Set differences between an as-designed and an as-manufactured model are computed. Topological deviations between the as-designed model and the as-manufactured model are determined based under-deposition and over-deposition features of the set differences. Based on the discrepancies, an input to a manufacturing instrument is changed to reduce topological differences between the as-manufactured model and the as-designed model.
Claims16
A method, comprising:
- determining a family of as-manufactured shapes based on an as-designed shape of a part, each member of the family comprising different overlap measure ratios between one and zero respectively corresponding to strict over-deposition and strict under-deposition policies of an additive manufacturing instrument;
- determining under deposition (UD) regions and over deposition (OD) regions based on intersection regions between the as-designed shape and the as-manufactured shapes;
- decomposing the UD regions and the OD regions into respective connected components;
- computing contributions of the connected component to a total topological deviation between the as-designed shape and the as-manufactured shapes in terms of an additive topological property;
- composing the connected components into smaller components;
- characterizing the contributions of the smaller components to the respective connected component in terms of alternating sums of the additive topological property to identify a subset of the connected components that contribute nonzero values to a global topological property;
- for each of the subset of connected components, providing localized remedies to reduce the contributions of the connected components to the global topological property;
- and
- changing an input to the additive manufacturing instrument to include the localized remedies when building the as-manufactured shapes.
The method of 1, wherein determining the family of as-manufactured shapes comprises cross-correlations or convolutions of defining functions of a minimum manufacturable neighborhood (MMN) and the as-designed shape.
A method comprising:
- determining a family of as-manufactured shapes based on an as-designed shape of a part, each member of the family comprising different overlap measure ratios between one and zero respectively corresponding to strict over-deposition and strict under-deposition policies of an additive manufacturing instrument;
- determining localized topological discrepancies for each of the as manufactured shapes as compared to the as-designed shape, the localized topological discrepancies contributing nonzero values to a global topological property;
- performing topological persistence filtering over a continuous change of process parameters of the additive manufacturing instrument;
- based the topological persistence filtering, determining a combination of the process parameters that result a predefined bound on the localized topological discrepancies;
- changing an input to the additive manufacturing instrument to utilize the combination of the process parameters.
The method of 10, wherein determining the family of as-manufactured shapes comprises cross-correlations or convolutions of defining functions of a minimum manufacturable neighborhood (MMN) and the as-designed shape.
Dependencies are inferred from the claim text.