Acousto-Optic Beam Shaping for Flexible Powder Bed Fusion Scanning
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Solution Overview
Problem
Conventional methods for additive manufacturing of component parts from powder materials face challenges in generating and switching between different energy beam profiles, particularly within a powder material layer, due to complexity and limited flexibility, which restricts productivity and material property customization.
Innovation Solution
A manufacturing device comprising a beam generating device, a scanner device, and a deflection device, along with a control device, allows for easy and rapid changes in beam profiles by using an acousto-optic deflector to displace the energy beam to various positions within the work region, enabling flexible generation of suitable beam profiles adapted to local requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional beam shaping methods using refractive or interferometric optical elements are used, then beam profiles can be generated, but the device complexity increases and flexibility to switch between different beam profiles is limited
Solution Approach 1:
The patent replaces conventional mechanical/optical beam shaping elements (refractive or interferometric optical elements) with an acousto-optic deflector that uses acoustic waves to modulate the energy beam. This substitution enables dynamic control of beam profiles through acoustic frequency modulation rather than requiring complex optical element arrangements, thereby reducing device complexity while increasing flexibility to switch between different beam profiles during the production process
Solution Approach 2:
The patent implements dynamic beam profile control by using an acousto-optic deflector that can rapidly change beam characteristics in real-time during the additive manufacturing process. Unlike static optical elements, the acoustic modulation allows continuous adaptation of beam profiles without physical reconfiguration, enabling flexible switching between different beam profiles within the same powder material layer to locally vary material properties
2Productivity
If conventional beam shaping methods are used, then some beam profiles can be realized, but the ability to switch between different beam profiles during production is difficult or impossible
Solution Approach 1:
The patent replaces static beam shaping optical elements with an acousto-optic deflector that uses acoustic wave modulation to dynamically control beam profiles. This enables rapid switching between different beam profiles during the additive manufacturing process without stopping production or reconfiguring optical elements, thereby simultaneously improving productivity and adaptability
Solution Approach 2:
The patent changes the physical state and parameters of the energy beam by using acoustic waves to modulate beam properties such as intensity distribution, shape, and position. By varying acoustic frequency and amplitude parameters, different beam profiles can be generated on-demand during production, enabling both high productivity and the ability to switch between beam profiles for local material property customization
3Adaptability or versatility
If conventional beam shaping methods are used, then beam profiles can be generated, but specialized devices are required which increases cost
Solution Approach 1:
The patent replaces expensive specialized optical beam shaping devices with an acousto-optic deflector that uses acoustic wave modulation. This substitution achieves the same beam profile generation capability with a more cost-effective device that does not require complex optical element arrangements, thereby improving ease of manufacture and cost-effectiveness while maintaining adaptability
Solution Approach 2:
The patent implements a universal beam control device (acousto-optic deflector) that can generate multiple different beam profiles using a single device configuration. Unlike conventional methods that require specialized optical elements for each beam profile type, the acousto-optic deflector can dynamically produce various beam profiles through acoustic modulation, reducing the need for multiple specialized devices and lowering overall manufacturing costs
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 productivity and quality by allowing for locally varying material properties and efficient component part manufacturing, with the ability to switch between different beam profiles without the need for specialized devices, resulting in cost-effective and high-quality production.
Implementation Method 1
at least one acousto-optic deflector configured to change a beam profile of the energy beam on the work region
Data Source
AI summary
A manufacturing device for additive manufacturing of a component part from a powder material includes a beam generating device configured to generate an energy beam, a scanner device configured to displace the energy beam to a plurality of irradiation positions in order to produce the component part from the powder material arranged in the work region using the energy beam, a deflection device configured to displace the energy beam to a plurality of beam positions at an irradiation position of the plurality of irradiation positions within a beam region, and a control device operatively connected to the deflection device and configured to control the deflection device and to change a beam profile of the beam region during production of a component part by changing a control of the deflection device.