3D Model Deformation Compensation for Sintered Part Accuracy
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Solution Overview
Problem
3D printing technologies face challenges in maintaining the intended dimensions of 3D objects due to deformations caused by the sintering process, leading to the need for post-processing corrections such as supports, machining, and increased manufacturing costs.
Innovation Solution
A deformation model is applied to the 3D model to predict and compensate for deformations during the sintering process, incorporating densification and mechanical load components, allowing for the generation of a modified 3D model that minimizes final object deformation, thereby reducing the need for post-processing corrections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a 3D model is directly printed using additive manufacturing followed by sintering, then the manufacturing process is simple and fast, but the final object dimensions deviate from the intended design due to sintering-induced deformation
Solution Approach 1:
The deformation model is applied in advance to the 3D model before printing, predicting and compensating for sintering deformations. This preliminary action modifies the digital model to include pre-calculated deformation compensation, ensuring the final sintered object achieves the intended dimensions without requiring post-processing corrections
Solution Approach 2:
The invention eliminates the need for traditional post-processing steps such as supports, machining, and manual corrections by rushing through the deformation compensation in the digital domain before printing. This approach skips multiple intermediate manufacturing steps and directly produces the final accurate object
2Ease of manufacture
If traditional 3D printing with sintering is used without deformation compensation, then manufacturing costs and post-processing operations are high, but the process appears simple initially
Solution Approach 1:
The invention replaces mechanical post-processing operations (support removal, machining, manual corrections) with a computational deformation model applied in the digital domain. This substitution of mechanical systems with computational methods maintains manufacturing simplicity while dramatically improving productivity by eliminating time-consuming post-processing steps
3Manufacturing precision
If deformation compensation is applied to the 3D model before printing, then the final object accuracy is improved, but the model processing time and computational complexity increase
Solution Approach 1:
The deformation model creates a computational copy or representation of the sintering process effects. By applying this digital copy of the deformation behavior to the 3D model, the system efficiently predicts and compensates for deformations without requiring physical trial-and-error testing, thus improving accuracy while minimizing time loss
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables the fabrication of 3D objects with greater accuracy and reduced manufacturing operations and costs by accounting for deformations in the original shape, resulting in higher quality and more efficient production.
Implementation Method 1
3D printing often includes post-processing such as sintering for solidification of the build material
Implementation Method 2
deformations caused by the sintering process, leading to the need for post-processing corrections
Data Source
AI summary
According to examples, an apparatus may include a processor and a memory on which are stored machine-readable instructions that when executed by the processor, cause the processor to access a 3D model of a 3D object to be fabricated and apply a deformation model to the 3D model. In some examples, the processor may generate a modified 3D model that compensates for a determined deformation of the 3D object during a sintering process for the 3D object. In some examples, the deformation model may include a densification component associated with a density of the 3D object and a deformation component associated with mechanical loads on the 3D object. The densification component may have initial state values associated with the density of the 3D object during the sintering process.