Melting Beam Alignment Using Test Articles in Additive Manufacturing
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Solution Overview
Problem
Conventional additive manufacturing (AM) systems face challenges in discerning defects caused by part design or equipment issues, making it difficult to align melting beam sources accurately for producing high-quality components.
Innovation Solution
A method involving the formation of test articles with specific shapes on a build plate to measure and adjust the alignment of melting beam sources, ensuring they meet target specifications through vertical and horizontal scaling and alignment measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If test articles are formed and measurements are taken to align the melting beam source, then manufacturing precision is improved, but loss of time increases due to additional processing steps
Solution Approach 1:
Test articles are formed at predetermined locations on the build plate before actual component manufacturing. These test articles contain features (such as angled surfaces with uniform angular differences) that enable preliminary measurement of beam source alignment parameters including vertical scale, vertical alignment, horizontal scale, and horizontal alignment. By performing alignment measurements on test articles before production, the system establishes baseline alignment data without interrupting the main manufacturing workflow.
Solution Approach 2:
The test articles serve dual purposes: they are both manufactured as part of the build process and simultaneously function as alignment calibration targets. The same build plate and manufacturing process that produce components also create the test articles, eliminating the need for separate calibration artifacts. The test articles' geometric features are specifically designed to self-reveal alignment deviations through their manufactured geometry.
2Measurement precision
If multiple test articles with different shapes are formed to measure alignment parameters, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The alignment measurement function is segmented across multiple test articles, each positioned at different locations on the build plate and each with specific geometric features designed to measure particular alignment parameters. The first test article measures vertical scale and alignment, while the second test article measures horizontal scale and alignment. This segmentation allows comprehensive alignment characterization without requiring a single complex test artifact.
Solution Approach 2:
Different regions of the build plate are assigned different test article types based on local measurement requirements. Test articles are strategically positioned at peripheral locations where they will be affected by specific beam source alignment issues. Each test article's shape and features are locally optimized to detect alignment deviations in its specific region, with angled surfaces and cylindrical features tailored to reveal particular alignment parameters.
Data Source
AI summary
Embodiments of the disclosure relate to the aligning of a melting beam source in an additive manufacturing (AM) system. Methods of the disclosure may include forming a first test article and a second test article of different shapes on a build plate. The method further includes measuring a vertical scale, vertical alignment, horizontal scale, and an alignment of the melting beam source using the first and second test articles. The method includes determining whether one of the vertical scale, the vertical alignment, the horizontal scale, or the horizontal alignment of the melting beam source is not within a corresponding tolerance of a target specification. If at least one of the vertical scale, the vertical alignment, the horizontal scale, or the horizontal alignment is within the corresponding tolerance, the method includes adjusting the melting beam source of the AM system to align the melting beam source to yield the target specification.