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Title: Conversion of in-process optical and thermal data into a single 3D file representing printing process in powder bed fusion
Authors: Zhang, Xuan
Nguyen, Ngoc-Vu
Tran, Tuan
Keywords: Engineering::Mechanical engineering
Issue Date: 2022
Publisher: ASTM International
Source: Zhang, X., Nguyen, N. & Tran, T. (2022). Conversion of in-process optical and thermal data into a single 3D file representing printing process in powder bed fusion. N. Shamsaei & M. Seifi (Eds.), Progress in Additive Manufacturing 2020 (pp. 75-91). ASTM International.
Abstract: Rapid development of additive manufacturing (AM) technologies leads to an increasing demand for quality control of printed parts. While in-process monitoring systems and post-testing technologies have been developed to inspect the part quality, there is not yet a well-established method that specifies the procedures and requirements to convert the extracted in-process layer-wise information into a single 3D file for quality evaluation and control. In this study, an off-axial imaging system utilizing optical and thermal cameras is deployed to acquire in-process optical and thermal images of the Powder Bed Fusion (PBF) process. Image registration and analyses are then performed on the acquired images to extract the in-process layer-wise data (e.g., coordinates, gray value, and temperature) associated with the printing process. Based on a comparison of file formats commonly used in industrial software, we select the Extensible Markup Language (XML) file format, which is specified by post-processing software, and further propose procedures for constructing a single 3D file from the in-process data to represent the printing process and evaluate the printing quality. This work provides guidelines for conversion of in-process data into 3D files and contributes to in-process monitoring and quality control of AM manufactured parts.
ISBN: 978-0-8031-7721-5
DOI: 10.1520/STP163720210019
Schools: School of Mechanical and Aerospace Engineering 
Research Centres: Singapore Centre for 3D Printing 
Rights: This is the accepted version of an article published in Progress in Additive Manufacturing 2020, Copyright @ 2022, ASTM International, West Conshohocken, PA, 75-91, STP163720210019.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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