研究目的
Investigating the use of a novel laser controller for improving performance in selective laser sintering (SLS) additive manufacturing by enabling intra-vector power modulation capabilities.
研究成果
The PBLP controller showed promise at improving the quality of components built using SLS, with a 33% reduction in thermal variation achieved. The controller is superior for building complex features and improves temperature uniformity, which is crucial for creating consistently high-quality parts.
研究不足
The initial implementation was only applicable to simple shapes with constant cross-sections. The PBLP controller introduces a small amount of error that scales with the scanning speed of the galvanometers.
1：Experimental Design and Method Selection:
The study involves the development of a Position-Based Laser Power (PBLP) controller that works with an off-the-shelf galvanometer controller to enable intra-vector power modulation.
2：Sample Selection and Data Sources:
Testing was conducted on a custom research machine (LAMPS) using ALM PA650, a common nylon 12 SLS material.
3：List of Experimental Equipment and Materials:
Equipment includes an Iradion Infinity series CO2 laser, FLIR A6701 and SC8240 MWIR cameras, and a National Instruments compactRio (cRIO) system.
4：Experimental Procedures and Operational Workflow:
The PBLP controller was tested for static and dynamic performance, including scanning the laser across the powder bed at different speeds while applying a known power map.
5：Data Analysis Methods:
Thermal data was analyzed using dynamic surrogate modeling to predict optimal laser powers and improve component uniformity.
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