Adaptive Exposure Control for Additive Manufacturing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Additive manufacturing methods, such as laser-beam or electron-beam melting/sintering, result in varying material properties due to exposure parameters and component geometry, leading to inconsistent surface qualities, especially in regions far from the radiation source.
Innovation Solution
Adjusting exposure parameters like power, velocity, and focal position of the high-energy beam as functions of construction parameters like component thickness, hatch distance, and overhang angle to ensure homogeneous material properties across different component geometries, using a device with a memory unit and control system to regulate these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a high-energy beam is used for additive manufacturing, then material can be selectively solidified layer by layer, but material properties become non-uniform due to varying exposure parameters and component geometry
Solution Approach 1:
The patent applies dynamics by making the exposure parameters (power, velocity, focal position) variable and adaptive rather than fixed. The control system dynamically adjusts these parameters based on real-time geometry data, overhang angles, and position information to compensate for geometric variations and achieve uniform material properties across different component regions.
Solution Approach 2:
The patent implements parameter changes by systematically varying exposure parameters (power, velocity, focal position) as functions of construction parameters (component thickness, hatch distance, overhang angle, angle of incidence). This allows the process to adapt to different geometric conditions and maintain consistent material properties throughout the manufactured component.
2Manufacturing precision
If exposure parameters are kept constant for simplicity, then the process is easier to control, but regions far from the radiation source receive insufficient energy leading to poor material properties
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing optimal exposure parameters in lookup tables or databases before the manufacturing process begins. The control system retrieves appropriate parameters based on position and geometry data, eliminating the need for complex real-time calculations while ensuring optimal energy delivery to all regions including those far from the radiation source.
Solution Approach 2:
The patent implements feedback mechanisms where the control system continuously monitors position, overhang angle, and geometry parameters during manufacturing, and automatically adjusts exposure parameters accordingly. This closed-loop control ensures that regions receiving insufficient energy (such as distant regions) automatically receive compensatory energy adjustments.
3Manufacturing precision
If the high-energy beam power is increased to ensure complete solidification, then material properties improve, but beam breakthrough occurs in thin regions causing defects
Solution Approach 1:
The patent applies local quality by tailoring exposure parameters to specific local geometric conditions. Different regions of the component receive customized energy input based on their local thickness, overhang angle, and position. Thin regions receive reduced power to prevent beam breakthrough, while thick or distant regions receive increased power to ensure complete solidification, achieving high quality throughout without defects.
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
Achieves homogeneous material properties that are optimally adapted to the component geometry, preventing beam breakthrough and insufficient solidification in surface, edge, and tapering regions, ensuring consistent quality across the component.
Implementation Method 1
at least one powder-form component material is first applied layer-wise onto a component platform in the region of a build-up and joining zone of the device. Subsequently, the component material is locally solidified layer-wise by introducing energy into the component material in the region of the build-up and joining zone by means of at least one high-energy beam, for example, an electron-beam or laser beam, whereby the component material is melted and/or sintered.
Implementation Method 2
at least one powder-form component material is first applied layer-wise onto a component platform in the region of a build-up and joining zone of the device. Subsequently, the component material is locally solidified layer-wise by introducing energy into the component material in the region of the build-up and joining zone by means of at least one high-energy beam, for example, an electron-beam or laser beam, whereby the component material is melted and/or sintered.
Implementation Method 3
at least one powder-form component material is first applied layer-wise onto a component platform in the region of a build-up and joining zone of the device. Subsequently, the component material is locally solidified layer-wise by introducing energy into the component material in the region of the build-up and joining zone by means of at least one high-energy beam, for example, an electron-beam or laser beam, whereby the component material is melted and/or sintered.
Implementation Method 4
at least one powder-form component material is first applied layer-wise onto a component platform in the region of a build-up and joining zone of the device. Subsequently, the component material is locally solidified layer-wise by introducing energy into the component material in the region of the build-up and joining zone by means of at least one high-energy beam, for example, an electron-beam or laser beam, whereby the component material is melted and/or sintered.
Data Source
AI summary
The invention relates to a method for the additive manufacture of at least one region of a component. Here, at least the following steps are carried out: a) layer-wise application of at least one powder-form component material onto a component platform in the region of a build-up and joining zone; b) layer-wise and local solidifying of the component material by selective exposure of the component material by at least one high-energy beam in the region of the build-up and joining zone, with the formation of a component layer; c) layer- wise lowering of the component platform by a pre-defined layer thickness; and d) repeating steps a) to c) until the component region or the component has been completely fabricated.