Additive Manufacturing Path Layout for Fiber Orientation Control
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Solution Overview
Problem
Current additive manufacturing technologies, such as CNC and 3D printing, face challenges in generating paths that result in components with optimal performance under various constraints and objectives, particularly in handling complex geometries and anisotropic materials like fiber-reinforced polymers.
Innovation Solution
The method involves generating preform path geometries and 3D printing tool paths using skeletonization, distance functions, and polyline representations to partition geometries into slender bodies, adhering to manufacturing constraints and optimizing properties like strength and thermal stability, while accommodating complex material orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional additive manufacturing path generation methods are used, then manufacturing process is simple, but component performance and optimization under constraints cannot be achieved
Solution Approach 1:
The patent segments the continuous path generation problem into discrete steps: skeletonization of the geometry, identification of key features, generation of control points, and creation of path segments. This segmentation allows complex geometries to be processed systematically while achieving optimized component performance through controlled material deposition at critical locations.
Solution Approach 2:
The patent transitions from 2D cross-sectional geometry to 3D path generation by extruding the skeletonized 2D geometry along the build direction and generating corresponding Z-coordinates. This dimensional transformation enables the system to account for volumetric constraints and optimize component performance in three-dimensional space while maintaining computational tractability.
2Manufacturing precision
If complex geometries are handled with traditional methods, then processing time is reduced, but manufacturing precision and adherence to constraints deteriorate
Solution Approach 1:
The patent performs preliminary skeletonization and feature identification on the 2D cross-sectional geometry before generating the 3D path. This preliminary action simplifies the subsequent path generation by pre-identifying critical features and control points, ensuring constraint adherence is built into the path structure from the outset rather than requiring iterative adjustments that would increase processing time.
3Strength
If material orientation is not optimized, then manufacturing process is simpler, but component mechanical properties and thermal stability are reduced
Solution Approach 1:
The patent applies local quality optimization by determining specific material orientations at different locations along the path based on local geometric features and stress considerations. Rather than using a uniform material orientation throughout the component, the system adjusts fiber or material alignment locally to match the principal stress directions and geometric requirements at each segment, thereby maximizing mechanical properties and thermal stability where most needed.
Data Source
AI summary
A system and methods are disclosed for producing components via additive manufacturing. In one embodiment, a three-dimensional geometry is sliced using a slicing plane to obtain a first two-dimensional geometry. A first polyline is generated based on a first skeleton of the first two-dimensional geometry, and a first slender body is generated based on the first polyline. The first slender body is subtracted from the first two-dimensional geometry to obtain a second two-dimensional geometry. A second polyline is generated based on a second skeleton of the second two-dimensional geometry. A first bundle of fibers is produced based on a segmentation of the first polyline and a second bundle of fibers is produced based on a segmentation of the second polyline. A component is produced from the first and second bundles of fibers using an additive manufacturing process.