Adaptive 3D printing
Methods provide for fabricating objects through additive manufacturing in a manner that compensates for deformations introduced during post-print processing, such as sintering. An initial model may be divided into a plurality of segments, the initial model defining geometry of an object. For each of the segments, modified geometry may be calculated, where the modified geometry compensates for a predicted deformation. Print parameters can then be updated to incorporate the modified geometry, where the print parameters define geometry of the printed object (e.g., configuration settings of the printer, a tool path, an object model). The object may then be printed based on the updated print parameters.
1. A method of configuring an additive manufacturing system, comprising:
dividing an initial model into a plurality of segments, the initial model defining a geometry of an object;
calculating, for each of the plurality of segments, a stress value using a cross-sectional area of the segment and a calculated weight of material residing atop the segment;
predicting a deformation of each of the segments according to the associated stress value as a result of a sintering process following deposition of all of the segments;
calculating, for each of the plurality of segments, a modified geometry of the segment as a function of the predicted deformation;
defining a printed geometry of the object from the collective of modified geometries of each of the segments; and
printing the object according to the printed geometry.
2. The method of claim 1 , wherein the stress value is calculated as a function of a location of a center of gravity of segments located above the segment.
3. The method of claim 1 , wherein the predicted deformation is based on a predicted anisotropic distortion due to anisotropy in a material composition of the object in the printed state.
4. The method of claim 1 , wherein the predicted deformation is based on a predicted gravitational force on the object during a sintering process.
5. The method of claim 1 , wherein the predicted deformation is based on a predicted deformation caused by at least one artifact exhibited by print patterns of a printed object.
6. The method of claim 1 , wherein the predicted deformation is based on a predicted deformation of the segment based on a predicted gravitational force on the object.
7. The method of claim 1 , wherein the predicted deformation is based on a predicted difference between shrinkage of an outer layer of the object and shrinkage of an interior of the object during a sintering process.
8. The method of claim 1 , further comprising calculating a modified geometry of a support structure as a function of the predicted deformation, the support structure being printed concurrently with the object and being positioned beneath at least a portion of the object.
9. A method of manufacturing an object, comprising:
dividing an initial model into a plurality of segments, the initial model defining a geometry of an object;
calculating, for each of the plurality of segments, a stress value using a cross-sectional area of the segment and a calculated weight of material residing atop the segment;
calculating, for each of the plurality of segments, a predicted deformation of the segment according to the associated stress value as a result of a post-processing;
calculating, for each of the plurality of segments, a modified geometry of the segment as a function of the predicted deformation, the modified geometry compensating for the predicted deformation of corresponding portions of the printed object; and
updating print parameters of the object to incorporate the modified geometry, the print parameters defining a printed geometry of the object;
printing a part according to the updated print parameters; and
sintering the part, the sintering causing the part to transform toward a geometry corresponding to the geometry of the object.