Rotating Build Platform for Additive Manufacturing in Microgravity
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Solution Overview
Problem
Additive manufacturing in microgravity environments, such as outer space, faces challenges due to the lack of gravitational force, which causes materials to shift or eject from the build platform during deposition, as existing technologies rely on gravity to constrain and direct material transfer.
Innovation Solution
A system that applies centrifugal acceleration to the additive manufacturing build platform using a motor-driven mechanical arm, simulating gravitational force by rotating the build platform and material delivery system, ensuring stable material deposition and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additive manufacturing is performed in microgravity environments, then applications in outer space are enabled, but materials shift or eject from the build platform during deposition
Solution Approach 1:
The patent applies centrifugal force generated by rotating the build platform to counteract the absence of gravitational force in microgravity environments. The rotation creates an outward centrifugal acceleration that simulates gravity, providing the necessary force to constrain materials on the build platform during additive manufacturing operations.
Solution Approach 2:
The system transitions from a static build platform to a dynamically rotating one. By rotating the build platform at controlled speeds, the system generates variable centrifugal forces that can be adjusted to match different gravitational equivalents, enabling reliable material constraint in microgravity while maintaining process control.
2Manufacturing precision
If gravitational force is relied upon to constrain and direct material transfer, then material deposition is controlled, but the process cannot function in microgravity environments
Solution Approach 1:
The patent changes the physical parameter of force generation from gravitational to centrifugal. By controlling the rotation speed of the build platform, the system can generate centrifugal acceleration equivalent to Earth's gravity or other gravitational levels, thereby maintaining material deposition control across different environmental conditions including microgravity.
Solution Approach 2:
The system replaces the gravitational field-dependent material constraint mechanism with a centrifugal force-based mechanism. The rotating build platform generates artificial gravity through centrifugal acceleration, substituting the natural gravitational field with a mechanically generated force field that provides equivalent or adjustable constraint on materials.
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 reliable and controlled additive manufacturing in microgravity environments by maintaining material constraint and directing deposition, allowing for precise microstructure manipulation and overcoming issues related to material shifting or ejection.
Implementation Method 1
a motor that applies a centrifugal acceleration to an additive manufacturing build platform, thereby generating a force at the build platform
Data Source
AI summary
A system for additive manufacturing under generated force includes a mechanical arm, a build platform, a build platform controller, a material delivery system controller, a laser scan system, a laser scan system controller, a motor controller and a master controller. The master controller determines a location of the material delivered to the build platform. The master controller further calculates a rate of rotation of the build platform as a function of the location of the material delivered and a desired centrifugal acceleration. The master controller further calculates an adjustment factor to correlate a rotation of the laser scan system to a rotation of the mechanical arm as a function of the location of the material delivered and a calculated rate of rotation of the build platform.