Rotating Build Unit Airflow for Solidification Line Control
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Solution Overview
Problem
Existing additive manufacturing (AM) techniques face challenges in controlling airflow orientation relative to solidification lines, limiting the angular variation of solidification lines and increasing build time complexity, which affects the microstructure and quality of the completed component.
Innovation Solution
A system and method that allow for the independent rotation of the build unit and mobile platform to dynamically adjust the gas flow direction in relation to the solidification lines, enabling precise control of airflow orientation for each layer during the AM process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the gas flow direction is kept fixed in conventional AM systems, then the system structure is simple, but the angular variation of solidification lines is limited and build time increases
Solution Approach 1:
The patent applies the dynamics principle by making the gas flow direction adjustable rather than fixed. The gas flow mechanism is configured to dynamically change the direction of gas flow relative to the build plate, allowing the system to adapt the airflow orientation to match different solidification line orientations. This dynamic adjustment capability enables angular variation of solidification lines while maintaining simple component structures, resolving the contradiction between adaptability and device complexity.
2Manufacturing precision
If the gas flow direction is adjusted to match solidification lines, then microstructure control is improved, but the system complexity increases
Solution Approach 1:
The patent applies parameter changes by adjusting the direction parameter of gas flow to match the orientation of solidification lines. The gas flow mechanism allows variation of flow direction as a controllable parameter, enabling optimization of airflow orientation for each layer's solidification line pattern. This parameter adjustment improves microstructure control without requiring complex mechanical modifications to the fundamental system architecture.
3Productivity
If fixed airflow direction is used, then the device structure is simple, but build time increases due to limited solidification line variation
Solution Approach 1:
The dynamic gas flow direction control enables the system to adapt airflow orientation to different solidification line patterns, allowing for more varied and optimized scanning strategies. This reduces build time by enabling efficient heat dissipation and microstructure control across different orientations, while the implementation maintains relatively simple device structure through a flexible airflow mechanism rather than complex mechanical systems.
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 enhances the ability to control microstructure and material properties, reduces build time, and improves the efficiency and quality of the AM process by allowing for greater angular variation of solidification lines, thus overcoming the limitations of fixed airflow directions.
Implementation Method 1
a gas flow mechanism with a gas flow direction substantially perpendicular to the direction of solidification lines and providing substantially laminar gas flow
Implementation Method 2
an energy source or laser to form a series of solidification lines in a layer of powder
Implementation Method 3
using an energy beam to sinter or melt a powder material
Data Source
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AI summary
A method, apparatus, and program for additive manufacturing. The additive manufacturing device includes a positioning mechanism configured to provide independent movement of at least one build unit in at least two dimensions. The build unit may further include a gasflow device for providing a flow zone along a first direction with relation to the build unit. The build unit may further include a powder delivery mechanism and an irradiation beam directing unit. The irradiation bean unit may follow a first irradiation path, wherein the first irradiation path forms at least a first solidification line and at least a second solidification line formed at an angle other than 0° and 180° with respect to the first solidification line. During the formation of the first solidification line, the build unit may be positioned in a first orientation such that the first direction of the flow zone is substantially perpendicular to the first solidification line. During the formation of the second solidification line, the build unit may be positioned in a second orientation such that the flow zone along the first direction is substantially perpendicular to the second solidification line.