Oscillating Energy Beam Paths for Uniform Thin-Wall 3D Printing
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Solution Overview
Problem
Existing additive manufacturing methods face challenges in building thin walls with uniformity and efficiency due to the need for multiple passes of energy beams, which can inhibit the minimal obtainable thickness and uniformity of consolidated build material.
Innovation Solution
The use of energy beam oscillations to consolidate build material, allowing for a single pass to define the thickness of thin walls by oscillating paths that vary in amplitude and frequency, thereby eliminating the need for additional passes and enhancing uniformity and precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If multiple passes of energy beams are used to consolidate build material, then the wall thickness can be reduced, but the uniformity and minimal obtainable thickness are inhibited
Solution Approach 1:
The energy beam is made dynamic by implementing oscillation motion during the consolidation process. The beam oscillates in a transverse direction while moving forward, creating a sinusoidal or triangular wave pattern that distributes energy more uniformly across the build material. This dynamic approach allows the beam to cover a wider area with a single pass, achieving thin wall consolidation without the need for multiple passes and maintaining uniformity throughout the consolidated material.
Solution Approach 2:
The energy beam applies periodic oscillation at specific frequencies to the build material during consolidation. By controlling the oscillation frequency and amplitude, the system creates regular, repeating patterns of energy distribution that ensure uniform melting and consolidation. This periodic action prevents localized overheating or insufficient consolidation that would occur with multiple static passes, thereby achieving both reduced thickness and improved uniformity.
2Reliability
If multiple passes of energy beams are used to build walls, then the wall can be fully consolidated, but the processing speed decreases
Solution Approach 1:
The energy beam oscillates dynamically during a single pass, covering a broader area and achieving full consolidation in one traversal. This dynamic motion pattern allows the beam to deposit energy uniformly across the entire wall cross-section without requiring multiple repeated passes, thereby maintaining consolidation quality while significantly increasing processing speed and productivity.
Solution Approach 2:
The oscillating energy beam maintains continuous useful action during a single uninterrupted pass. Instead of stopping and restarting multiple times for different passes, the beam continuously moves forward while oscillating, ensuring uninterrupted energy delivery and consolidation. This continuous action eliminates idle time between passes and maintains consistent consolidation quality throughout the process.
3Reliability
If multiple passes of energy beams are used, then the wall can be consolidated, but the manufacturing efficiency is reduced
Solution Approach 1:
The oscillating energy beam dynamically covers a wider area during a single pass, achieving complete wall consolidation without requiring multiple static passes. This dynamic approach consolidates material more efficiently by distributing energy uniformly across the entire wall thickness in one continuous motion, thereby maintaining reliability while improving manufacturing efficiency.
Solution Approach 2:
The periodic oscillation of the energy beam creates regular patterns of energy distribution that ensure thorough consolidation in a single pass. By controlling the oscillation parameters (amplitude, frequency, waveform), the system achieves reliable consolidation while reducing the total number of passes required, thus improving overall manufacturing efficiency without sacrificing quality.
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 enables the construction of thin walls with higher efficiency and precision, reducing the need for multiple passes and minimizing inconsistencies, thus improving the manufacturing process.
Implementation Method 1
irradiating a first build plane region using a first energy beam defining a beam diameter, the first energy beam travelling along a first oscillating path in a first direction to consolidate a first wall
Implementation Method 2
additive manufacturing may involve a powder bed fusion process in which one or more energy beams are directed onto a powder bed to melt, fuse, or sinter sequential layers of build material such as powder material
Data Source
AI summary
Methods of additively manufacturing a three-dimensional object include irradiating a first build plane region using a first energy beam defining a beam diameter, the first energy beam travelling along a first oscillating path in a first direction to consolidate a first wall defining a thickness perpendicular to the first direction, wherein a build material adjacent a first side of the first wall and the build material adjacent a second side of the first wall, opposite the first side of the first wall, remains unconsolidated; and wherein the thickness of the first wall is greater than the beam diameter.