In-line quality control using dimensional metrology of 3D metal parts printed by laser beam melting

Michael Kalms; Ralf B. Bergmann

doi:10.1117/12.2514240

1 April 2019 In-line quality control using dimensional metrology of 3D metal parts printed by laser beam melting

Michael Kalms, Ralf B. Bergmann

Proceedings Volume 10971, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIII; 109710N (2019) https://doi.org/10.1117/12.2514240
Event: SPIE Smart Structures + Nondestructive Evaluation, 2019, Denver, Colorado, United States

Abstract

We present an approach for quality control using dimensional metrology based on structured light applied to laser beam melting. This application serves as a model for in-line monitoring under adverse conditions such as elevated temperatures, stray light and thermal gradients in the process chamber making closed-loop control very ambitious. Nevertheless, we demonstrate the implementation of precise dimensional measurement of printed parts and powder deposition allowing in- or off-line process assessment. As data acquisition and processing must be fast, we investigate the so-called structure function to extract global or local parameters such as roughness or geometrical periodicities like waviness of the powder deposition.

Citation Download Citation

Michael Kalms and Ralf B. Bergmann "In-line quality control using dimensional metrology of 3D metal parts printed by laser beam melting", Proc. SPIE 10971, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIII, 109710N (1 April 2019); https://doi.org/10.1117/12.2514240

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