Additive Manufacturing Support Structure Optimization
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Solution Overview
Problem
Additive manufacturing processes, particularly 3D printing, face challenges in producing objects with overhanging portions due to the need for support structures that are not mechanically robust and often require complex simulations or trial-and-error methods, leading to high material consumption and printing times.
Innovation Solution
An automatic method for determining a set of points to be supported on the object, which generates a support structure comprising vertical pillars and horizontal connectors, ensuring mechanical stability while minimizing material usage and printing time, by testing support conditions and distance criteria for each layer during the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a robust support structure is created using predefined infill patterns or regular volumetric lattices, then mechanical stability is improved, but material consumption and printing time increase
Solution Approach 1:
The support structure is segmented into multiple hierarchical levels (macro-scale load-bearing elements, meso-scale connecting elements, micro-scale infill patterns). This segmentation allows each level to perform specific functions efficiently, reducing overall material usage while maintaining stability.
Solution Approach 2:
Different regions of the support structure have different densities and patterns tailored to local requirements. High-stress areas use denser patterns while low-stress areas use sparser patterns, optimizing material distribution according to actual mechanical needs.
2Ease of manufacture
If a regular volumetric lattice is used for support structure, then ease of manufacture is improved, but adaptability to object geometry deteriorates
Solution Approach 1:
The support structure generation process is dynamic and adaptive, automatically adjusting the lattice parameters, orientation, and density based on the specific geometry and overhanging features of the object being printed, rather than using a fixed regular pattern.
Solution Approach 2:
Multiple parameters of the lattice structure (cell size, orientation angles, density, pattern type) are varied and optimized according to the local geometry of the object, allowing the same generation method to adapt to different object shapes and support requirements.
3Manufacturing precision
If complex simulations or trial-and-error methods are used to determine support points, then manufacturing precision is improved, but productivity deteriorates
Solution Approach 1:
The method performs preliminary analysis of the object geometry to identify overhanging portions and critical support points before actual printing begins. This preliminary action determines the support structure configuration in advance, avoiding the need for time-consuming simulations or trial-and-error adjustments during printing.
Solution Approach 2:
The support structure generation algorithm automatically analyzes the object geometry and determines optimal support points without requiring external simulation tools or manual intervention. The system serves itself by using its own geometric analysis capabilities to generate the support configuration.
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
The method produces a mechanically robust support structure that reduces material consumption and printing time, ensuring the stability of overhanging portions during the additive manufacturing process without the need for complex simulations or trial-and-error methods.
Implementation Method 1
a filament of material, usually plastic, is forced through a heated, movable nozzle. As the nozzle moves along a predetermined path in a horizontal XY plane, the molten filament, extruded from the nozzle, is deposited onto the material of the previous layer
Implementation Method 2
the molten filament, extruded from the nozzle, is deposited onto the material of the previous layer
Implementation Method 3
the molten filament, extruded from the nozzle, is deposited onto the material of the previous layer and bonds to it, creating additional thickness
Data Source
Figure 1~3
Figure 4
Figure 5a~5c
AI summary
A method for determining a set of points to be supported for an object to be manufactured by means of an additive manufacturing method, characterised in that it comprises a step consisting of subdividing the object into successive layers, each layer corresponding to a thickness of material deposited during the manufacture of the object; and, for each layer, adding, to a set of points to be supported, points to be supported (Ps) on the surface of the object that make it possible to ensure the stability of all of the sub-objects (2n), a sub-object being defined as a solid resulting from the manufacture of the i first layers (Ci) of the object.