Additive Manufacturing Beam and Gas Control for Low-Porosity Parts
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Solution Overview
Problem
Current additive manufacturing systems face difficulties in adjusting material properties, such as gas composition and thermal energy intensity, which limits the production of objects with desirable properties like increased strength and reduced porosity.
Innovation Solution
A system and method that include a control apparatus to adjust the properties of the gas surrounding the energized beam and the bed surface, using electrical potential and magnetic fields to alter the beam's location, diffusion, and the characteristics of the melted material pool, thereby controlling the additive manufacturing process to achieve improved object properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the type of gas in the environment is changed to improve object properties, then the strength and porosity of the constructed object can be improved, but it takes an extended period of time to change the gas type
Solution Approach 1:
The patent applies parameter changes by enabling dynamic adjustment of gas properties (such as gas type, pressure, and composition) during the additive manufacturing process. Instead of requiring system reconfiguration to change gas types, the system can modify gas parameters in real-time through controlled introduction of different gases or adjustment of gas flow rates, thereby reducing the time required to optimize object properties while maintaining strength improvements.
2Strength
If the intensity of thermal energy is adjusted to improve object properties, then the quality of the constructed object can be improved, but the thermal energy source generally cannot be adjusted
Solution Approach 1:
The patent implements dynamics by transforming the thermal energy source from a static, fixed-intensity system to a dynamic, adjustable system. The thermal energy source can now vary its intensity in real-time during the additive manufacturing process, allowing optimization of melting and fusion parameters for different material layers and object geometries. This dynamic control enables improved object strength while maintaining process flexibility.
Solution Approach 2:
The system applies parameter changes to the thermal energy source by enabling adjustment of key parameters such as energy intensity, beam power, and heating rate. These parameter modifications allow the thermal energy source to adapt to different manufacturing requirements, improving object properties through optimized thermal processing while maintaining versatility across different material types and object designs.
3Manufacturing precision
If the material deposition and thermal processing parameters are optimized to improve object properties, then the strength and porosity can be improved, but the process becomes more complex
Solution Approach 1:
The patent applies feedback mechanisms by implementing real-time monitoring and control systems that track material deposition parameters, thermal energy application, and resulting object properties. Sensors and detection systems provide feedback loops that automatically adjust process parameters to maintain optimal conditions, thereby achieving high manufacturing precision without requiring manual intervention or overly complex system architecture. The feedback system coordinates multiple subsystems to work together efficiently.
Solution Approach 2:
The system applies universality by designing multi-functional components that perform multiple operations simultaneously. For example, the thermal energy source not only melts material but also controls cooling rates and influences microstructure formation. The gas system simultaneously provides atmosphere control, heat transfer medium, and porosity regulation. This multi-functionality reduces the number of separate components needed, achieving high precision object properties while limiting overall system 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
Enables the production of three-dimensional objects with enhanced strength and reduced porosity by fine-tuning the additive manufacturing process through controlled adjustments of the energized beam and material properties, overcoming limitations in existing systems.
Implementation Method 1
an energy source configured to selectively direct an energized beam at the material to form a melted pool of the material to fuse a new layer of the material to a previously formed layer
Implementation Method 2
a control apparatus configured to adjust the properties of a gas surrounding the material and through which the energized beam extends
Implementation Method 3
allowing the melted material to solidify to bond/fuse the material to the previously formed layer(s)
Data Source
AI summary
A method is disclosed for additive manufacturing a three-dimensional object layer-by-layer including depositing a layer of material on a bed surface or a previously deposited layer of the object to form the object layer-by-layer; providing energy to the material after each layer is deposited with the energy being provided by an energy source that forms an energized beam directed at the material; altering a property of a gas surrounding the material and through which the energized beam extends to alter a property of the object constructed from the material; melting the material with the energized beam to form a melted pool of liquefied material; and allowing the material to solidify to bond the material to a previous layer of material of the object.