Additive Manufacturing Modification Data for Small Feature Fusion
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Solution Overview
Problem
Additive manufacturing techniques face challenges in generating features smaller than a certain threshold size due to insufficient energy absorption, leading to incomplete fusion and misshapen or weakened objects, especially for isolated features.
Innovation Solution
A method involving the analysis of object model data to identify features at risk of not reaching the fusing temperature, with the generation of modification data to increase the temperature of these features by adjusting material distribution and energy absorption characteristics, such as increasing the volume of features or applying more energy-absorbing print agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If standard additive manufacturing is used for small features, then manufacturing capability is maintained, but features below threshold size fail to reach fusing temperature resulting in incomplete fusion and misshapen objects
Solution Approach 1:
The patent applies local quality by modifying energy absorption characteristics specifically for isolated features rather than uniformly across the entire object. Print agents are selectively applied to targeted regions to enhance local energy absorption where needed, allowing small features to reach fusing temperature without affecting other areas of the object.
Solution Approach 2:
The patent changes physical parameters by modifying energy absorption characteristics through selective application of print agents. This alters the thermal properties of specific regions, enabling features below the threshold size to absorb sufficient energy and reach the required fusing temperature for complete fusion.
2Reliability
If energy is increased to fuse small features, then fusion temperature is reached, but excessive energy causes overheating and deformation of surrounding areas
Solution Approach 1:
The patent uses local quality to apply energy absorption modifications only to specific isolated features that require enhanced heating. This localized approach ensures that increased energy is concentrated where needed to reach fusing temperature without causing excessive heating or deformation in surrounding areas.
Solution Approach 2:
The patent introduces print agents as intermediaries between the energy source and the build material. These agents selectively absorb and distribute energy, mediating the heating process to ensure small features reach fusing temperature while preventing overheating of surrounding areas through controlled energy transfer.
3Stability of the object's composition
If uniform print agent application is used, then energy absorption is consistent, but isolated small features still cannot reach sufficient temperature for complete fusion
Solution Approach 1:
The patent transitions from uniform to non-uniform print agent application by identifying isolated features and applying enhanced print agent coverage specifically to those regions. This local quality approach ensures that energy absorption is increased precisely where needed for small feature fusion while maintaining appropriate absorption characteristics in other areas.
Solution Approach 2:
The patent performs preliminary analysis of the object model to identify isolated features before print agent application. This preliminary action allows the system to pre-determine which regions require enhanced energy absorption, enabling targeted modification of print agent distribution to ensure small features reach sufficient temperature for complete fusion.
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 ensures that features below the threshold size can successfully fuse by increasing their temperature to the fusing point, preventing incomplete fusion and improving the accuracy and quality of the generated objects.
Implementation Method 1
insufficient energy absorption, leading to incomplete fusion
Implementation Method 2
the solidification of a build material... heating the layers of build material to cause melting in selected regions
Data Source
AI summary
In an example, a method includes analysing, using at least one processor, object model data representing at least a portion of an object to be generated by an additive manufacturing apparatus by fusing a build material to determine at least one predicted object generation temperature. The method may further include identifying, using at least one processor and from said analysing, a feature of the at least a portion of the object associated with a predicted object generation temperature which is below a fusing temperature of build material to be used in object generation. The method may further include determining, using at least one processor, modification data to be used in object generation, the modification data being to increase a temperature of the feature in object generation.