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Proceedings Paper

A phase-guided method for extracting the contour of the fusion area in laser powder bed fusion
Author(s): Piyao He; Kai Zhong; Xingjian Liu; Gang Zhou; Congjun Wang; Qingsong Wei; Yusheng Shi; Zhongwei Li
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Paper Abstract

Process signatures of the fusion area directly determine the quality of the part in Laser Powder Bed Fusion (LPBF). The geometric contour of the fusion area is one of the most important indicators of manufacturing quality. The accurate detection of the contour has been generating considerable interest. However, due to the complex operating condition in LPBF, the 2D images of the fusion area suffer from shortcomings such as poor contrast, high noise, and vary illumination. This makes the location of the contour extremely difficult for traditional detection methods. In this study, a robust contour detection method of the fusion area in LPBF is proposed. In order to raise the contrast of the contour, the phase image with clear contour details will be calculated from a series of fringe images with phase shift projected onto the fusion area. A phase-guided contour extraction method is conducted to accurately locate the center of contour which reduces significantly the impact of the severe manufacturing condition. Experimental results reveal that the proposed method can obtain the contours of the fusion area in a very short time, with higher accuracy and repeatability. In addition, it also holds the potential to be an effective way to monitor the geometric defects layer-wise.

Paper Details

Date Published: 16 October 2019
PDF: 6 pages
Proc. SPIE 11205, Seventh International Conference on Optical and Photonic Engineering (icOPEN 2019), 112051H (16 October 2019); doi: 10.1117/12.2541928
Show Author Affiliations
Piyao He, Huazhong Univ. of Science and Technology (China)
Kai Zhong, Huazhong Univ. of Science and Technology (China)
Xingjian Liu, Huazhong Univ. of Science and Technology (China)
Gang Zhou, Huazhong Univ. of Science and Technology (China)
Congjun Wang, Huazhong Univ. of Science and Technology (China)
Qingsong Wei, Huazhong Univ. of Science and Technology (China)
Yusheng Shi, Huazhong Univ. of Science and Technology (China)
Zhongwei Li, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 11205:
Seventh International Conference on Optical and Photonic Engineering (icOPEN 2019)
Anand Asundi; Motoharu Fujigaki; Huimin Xie; Qican Zhang; Song Zhang; Jianguo Zhu; Qian Kemao, Editor(s)

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