Acoustic Interference Image for Complex Component Fabrication
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Solution Overview
Problem
Conventional rapid prototyping methods are limited by their additive, time-consuming nature, restricted geometry, and inability to fabricate fully enclosed hollow spaces, with a lack of flexibility in creating complex shapes, especially those without mirror symmetry.
Innovation Solution
A method and apparatus utilizing acoustic interference images formed by interfering sub-waves to shape and fixate material distributions within a working medium, allowing for the creation of complex shapes without the need for specific resonator geometries or sacrificial materials, enabling the fabrication of components with increased flexibility and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional rapid prototyping uses serial addition of structures, then components can be fabricated with controlled geometry, but the process becomes time-consuming and limits productivity
Solution Approach 1:
The patent employs periodic acoustic waves to manipulate particle distribution. By using standing waves generated through periodic acoustic action, particles are systematically arranged in desired geometries simultaneously, achieving both geometric precision and high productivity through parallel fabrication
Solution Approach 2:
The invention replaces mechanical serial addition processes with acoustic field-based particle manipulation. Acoustic radiation forces substitute for mechanical deposition, enabling simultaneous positioning of multiple particles in three-dimensional space, thereby dramatically increasing fabrication speed while maintaining geometric control
2Ease of manufacture
If conventional rapid prototyping restricts geometry to accommodate serial growth, then manufacturing process remains simple, but flexibility in creating complex shapes is reduced
Solution Approach 1:
The patent uses dynamically controllable acoustic fields where transducer phases and amplitudes can be adjusted in real-time. This dynamic control allows the system to adapt to various complex geometries without changing the manufacturing process itself, providing both geometric versatility and process simplicity
Solution Approach 2:
The invention changes acoustic field parameters (frequency, phase, amplitude distribution) to create different particle arrangements. By varying these parameters, complex three-dimensional geometries with hollow spaces can be fabricated using the same simple acoustic process, achieving both geometric flexibility and ease of manufacture
3Shape
If conventional methods use sacrificial material to create hollow spaces, then enclosed volumes can be formed, but additional post-processing steps are required increasing time consumption
Solution Approach 1:
The patent extracts the need for sacrificial materials entirely by using acoustic radiation forces to directly position particles only in desired solid regions. Acoustic pressure nodes and antinodes are strategically positioned to leave hollow spaces without requiring filler materials, eliminating post-processing removal steps and reducing time loss
Solution Approach 2:
The acoustic field acts as an intermediary that directly sculpts the component shape including hollow spaces. Instead of using sacrificial material as a mediator, the acoustic field itself mediates the particle arrangement to create the final geometry with enclosed volumes in a single step
4Productivity
If parallel fabrication methods use standing waves in resonators, then particle distribution can be formed quickly, but component geometry is severely limited by resonator shape
Solution Approach 1:
The patent creates a universal acoustic fabrication system where the same apparatus can generate diverse particle distributions for different component geometries. By controlling transducer phases and amplitudes, the system performs multiple geometric configurations using identical hardware, achieving both parallel fabrication and geometric versatility
Solution Approach 2:
The invention deliberately uses asymmetric transducer arrangements and non-uniform acoustic field distributions to create arbitrary three-dimensional particle patterns. This asymmetric control breaks the symmetry constraints of conventional resonators, enabling fabrication of complex geometries including asymmetric shapes and enclosed hollow spaces
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 rapid and flexible fabrication of components with complex shapes, including fully enclosed hollow spaces, by generating acoustic interference images independently of container shape and resonator geometry, allowing for parallel fabrication and reduced time consumption compared to traditional methods.
Implementation Method 1
an acoustic interference image is created by the acoustic source device, wherein the acoustic interference image is formed by interfering sub-waves
Implementation Method 2
precursor material is moved by the effect of the acoustic interference image
Implementation Method 3
At least one of the material distribution and the working medium is subjected to a fixation, wherein the material of the material distribution is bound or the material of the material distribution is bound with the working medium
Data Source
AI summary
A method of fabricating a component (1) comprises the steps of providing precursor material in a working medium, creating acoustic forces and positioning the precursor material in the working medium under the effect of the acoustic forces, so that a material distribution is formed, which has a shape of the component to be fabricated, and subjecting at least one of the material distribution and the working medium to a fixation, so that the precursor material of the material distribution or the working medium surrounding the material distribution is bound, wherein the step of creating the acoustic forces includes generating an acoustic interference pattern (5), and the material distribution (4) is formed by moving the precursor material (2) towards energy extrema of the acoustic interference pattern (5). Furthermore, an apparatus (100) for fabricating a component (1) is described.