Geometrical Compensation Models for Accurate 3D Printed Attributes
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Solution Overview
Problem
Additive manufacturing techniques face challenges in achieving dimensional accuracy due to object growth or shrinkage during the manufacturing process, particularly when using thermal fusion methods, where build materials can adhere or deform, leading to inconsistencies in the final product dimensions.
Innovation Solution
The implementation of geometrical compensation models that apply scaling and offset factors to object model data to predict and compensate for deformation, considering factors like object location, volume, and surface area, allowing for precise adjustments to ensure accurate object generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If thermal fusion methods are used to generate three-dimensional objects layer by layer, then additive manufacturing capability is achieved, but dimensional accuracy deteriorates due to object growth or shrinkage during manufacturing
Solution Approach 1:
The patent applies geometrical compensation models to object model data before the actual additive manufacturing process. These models predict deformation based on object characteristics (location, volume, surface area) and pre-calculate scaling and offset factors. By performing this compensation action preliminarily on the digital model, the system anticipates and corrects for thermal fusion-induced dimensional changes before physical manufacturing begins, thereby resolving the contradiction between enabling additive manufacturing and maintaining dimensional accuracy.
2Manufacturing precision
If physical experimentation is conducted to determine optimal manufacturing parameters, then manufacturing precision can be improved, but material and energy waste increases
Solution Approach 1:
The patent creates virtual copies of the manufacturing process through simulation. Geometrical compensation models generate predicted deformation outcomes and optimized parameters in a digital environment before physical manufacturing. This virtual experimentation allows multiple parameter iterations without consuming physical materials or energy, eliminating the need for costly physical trial-and-error while still achieving high dimensional accuracy in the final product.
3Manufacturing precision
If geometrical compensation models with multiple factors are applied to predict deformation, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The patent implements location-specific geometrical compensation by determining object placement location within the fabrication chamber and applying location-specific compensation factors. Different regions of the chamber have different thermal characteristics, so the system tailors the compensation model to local conditions rather than using a universal approach. This localized quality adjustment maintains high dimensional accuracy while managing complexity by focusing computational resources on relevant local factors rather than overwhelming global complexity.
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 significantly improves dimensional accuracy by simulating and predicting object attributes, reducing the likelihood of physical experimentation and minimizing material and energy waste by selecting the most suitable compensation model for specific use cases.
Implementation Method 1
the solidification method may include heating the layers of build material to cause melting in selected regions
Implementation Method 2
heating the layers of build material to cause melting in selected regions
Implementation Method 3
Additive manufacturing techniques may generate a three-dimensional object through the solidification of a build material
Data Source
AI summary
In an example, a method includes receiving object model data representing at least a portion of an object that is to be generated by an additive manufacturing apparatus by fusing build material within a fabrication chamber. At least one of a number of different geometrical compensation models to be applied to the object model data may be selected, where the geometrical compensation models are to determine geometrical compensations to compensate for object deformation in additive manufacturing. An object generation operation based on a modification of the object model data using the or each selected geometrical compensation mode may be simulated and predicted attributes of the object when generated based on the or each simulation may be displayed.