Artificial neural network-based geometry compensation to improve the printing accuracy of selective laser melting fabricated sub-millimetre overhang trusses
نویسندگان
چکیده
Selective laser melting processes deposit and join metal powders to near net shape in a layer-by-layer manner. The process of re-solidification several layers deposited material can result geometric deviations, the impact is particularly significant for sub-millimetre structures oriented at wide range overhang angles with respect building platform. This paper assesses benchmarks capabilities neural network-based compensation approach truss lattice circular cross-sections. network method capable generate free-form cross-sections enhanced freedom compared more established analytical approaches limited predefined shapes. For training, dome composed trusses different were designed printed by selective measured via X-ray computed tomography, resulting point cloud data sets containing than 20,000 points each angle. experimental validation, network-compensated benchmarked against elliptical parameter compensation. Results show that compensated achieve higher printing dimensional accuracy uncompensated those based on estimates.
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ژورنال
عنوان ژورنال: Additive manufacturing
سال: 2021
ISSN: ['2214-8604', '2214-7810']
DOI: https://doi.org/10.1016/j.addma.2020.101594