Acoustic Particle Stream Shaping in Directed Energy Deposition
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Solution Overview
Problem
Existing directed energy deposition methods face limitations in controlling particle stream characteristics, such as cross-sectional size and shape, which affect part geometry and microstructure, leading to inefficiencies in additive manufacturing.
Innovation Solution
A system and method utilizing a sound field to control particle stream characteristics by generating a sound field that modifies the particle stream before it contacts the part, using sound sources and energy sources to achieve desired melt pool formation and material deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional directed energy deposition methods are used without sound field control, then the process is simpler, but particle stream characteristics such as cross-sectional size and shape cannot be precisely controlled
Solution Approach 1:
A sound field is introduced as an intermediary between the particle stream source and the substrate to control particle stream characteristics. The sound field acts as a mediator that modifies particle trajectories, focusing, and distribution without direct mechanical contact, enabling precise control of cross-sectional size and shape while maintaining relative system simplicity
Solution Approach 2:
Traditional mechanical methods for controlling particle streams (such as physical nozzles, masks, or mechanical positioning systems) are replaced with an acoustic field-based approach. The sound field provides non-contact control of particle stream characteristics, reducing mechanical complexity while improving precision
2Manufacturing precision
If particle stream characteristics are not controlled, then the system is easier to operate, but part resolution and surface roughness are degraded
Solution Approach 1:
The sound field parameters (frequency, amplitude, phase) are adjusted to control particle stream characteristics dynamically. By changing acoustic parameters rather than mechanical configurations, the system achieves high part resolution while maintaining ease of operation through software-based control
3Manufacturing precision
If a sound field is introduced to control particle streams, then manufacturing precision improves, but device complexity increases
Solution Approach 1:
The sound field system is designed to perform multiple functions simultaneously: controlling particle stream focusing, shaping, and positioning. This multi-functionality reduces the need for separate control mechanisms, thereby limiting the increase in device complexity while achieving superior material deposition control
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 allows for precise control of particle stream characteristics, enhancing part resolution, surface roughness, and microstructure, enabling faster and more accurate additive manufacturing with improved material deposition.
Implementation Method 1
a sound field which the particle stream passes through, the sound field controlling characteristics of the particle stream before it contacts the part
Implementation Method 2
melting the particle stream as it contacts the part being fabricated
Data Source
AI summary
A directed energy deposition system and method including a set of nozzles for directing material, such in the form of a particle stream, at a part and a set of energy sources for generating a melt pool as the material contacts the part. The system further includes apparatus for generating a sound field that controls characteristics of the particle stream as it passes through the sound field.