Dual-Beam Powder Sintering With Independent Optical Focus Control
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Solution Overview
Problem
Current powder-based additive manufacturing techniques, such as selective melting, face challenges in reducing manufacturing time and achieving precise melting of layers, especially when using a single build platform with a single energy beam source.
Innovation Solution
A sintering machine with two independent energy beam emission and control modules, each with axially movable optical focusing means, allows simultaneous action on a single working zone, enabling independent adjustment of focusing means for precise melting and reducing manufacturing time by allowing real-time focal length adjustments and angular orientation adjustments for improved precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single energy beam source is used on a single build platform, then the device complexity is reduced, but the manufacturing time and productivity are increased
Solution Approach 1:
The single energy beam source is segmented into multiple independent energy beam sources (first and second energy beam sources), each capable of operating independently on the same build platform. This segmentation allows parallel processing of different layers or regions, thereby increasing productivity without significantly complicating the overall device architecture.
Solution Approach 2:
Multiple energy beam sources are merged into a single working zone on the build platform, allowing simultaneous or sequential operation on the same powder bed. This merging enables faster manufacturing by processing multiple areas concurrently while maintaining a compact device structure.
2Device complexity
If a single energy beam source is used on a single build platform, then the device complexity is reduced, but the manufacturing time is increased
Solution Approach 1:
The build platform is designed to accommodate multiple energy beam sources in advance, with pre-configured optical paths and control systems. This preliminary arrangement enables immediate parallel processing when manufacturing begins, reducing idle time and accelerating the overall manufacturing process without requiring complex real-time reconfiguration.
Solution Approach 2:
Multiple energy beam sources enable continuous processing by eliminating idle periods between layers or regions. While one beam source processes a specific area, another can simultaneously process a different area, ensuring that the manufacturing process continues without interruption and reducing total manufacturing time.
3Device complexity
If the optical focusing means cannot be independently adjusted, then the device complexity is reduced, but the melting precision is degraded
Solution Approach 1:
The optical focusing means for each energy beam source are made independently adjustable, allowing dynamic optimization of focal positions and beam parameters. This dynamic adjustability enables precise control over the melting process for each beam source, ensuring high manufacturing precision while maintaining manageable device complexity through modular design.
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 configuration significantly reduces cycle time for component manufacturing while ensuring precise melting of powder layers, enhancing productivity and precision in additive manufacturing processes.
Implementation Method 1
each module is provided with an optical focusing means for the energy beam emitted by said source
Implementation Method 2
The laser sintering technique consists in manufacturing the component layer by layer, by stacking the layers of powder, which are consolidated and fused on top of one another by the laser beam
Implementation Method 3
selective melting of superposed layers of powder
Implementation Method 4
An 'energy beam' is understood to mean electromagnetic radiation (for example a laser beam) or a beam of particles (for example an electron beam)
Implementation Method 5
An 'energy beam' is understood to mean electromagnetic radiation (for example a laser beam) or a beam of particles (for example an electron beam)
Implementation Method 6
The machine also comprises at least two actuators that are each associated with one of the optical focusing means in order to adjust the vertical axial positions of said means with respect to the working zone independently of one another
Data Source
AI summary
A machine for additive manufacturing of components by sintering powder includes a framework, a working zone, at least two beam emission and control modules, and at least two actuators. Each module, which is structured to emit an energy beam and to control the energy beam, is mounted inside the framework and is provided with an emission source and an optical system for focusing the energy beam emitted from the source. Each module acts on the working zone to manufacture a same component. Each optical system is axially movable in translation with respect to the framework. The actuators are associated with the optical systems, respectively, and are arranged to adjust axial positions of the optical systems with respect to the working zone, the axial positions being adjustable independently of each other.