公开(公告)号：US20230417707A1

公开(公告)日：2023-12-28

申请号：US18050656

申请日：2022-10-28

申请人： NANJING UNIVERSITY OF AERONAUTICS AND ASTRONAUTICS

发明人： Chao Zhang ,  Zhaomin Wang ,  Hongli Ji ,  Jinhao Qiu ,  Chongcong Tao ,  Jun Wang

IPC分类号： G01N29/06 ,  G01N29/46 ,  G01N29/22 ,  B33Y40/00 ,  B33Y50/00

CPC分类号： G01N29/06 ,  G01N29/46 ,  G01N29/225 ,  B33Y40/00 ,  B33Y50/00 ,  G01N2291/0289

摘要： The present disclosure relates to a method and system for detecting a structural defect in additive manufacturing. The method includes: layering a three-dimensional model of an additive manufacturing test piece to obtain a two-dimensional contour of an interface of each layer, and generating a machining path; arranging a non-contact sensor at a fixed measuring point of the additive manufacturing test piece, and acquiring an ultrasonic signal at each machining point when a pulse laser conducts machining point by point along the machining path; forming a visual ultrasonic field based on all the ultrasonic signals, and determining ultrasonic field data; determining, based on the ultrasonic field data, a curve of a peak of an incident wave changing with the machining path; and determining whether a machining defect exists at the machining points based on the curve of the peak of the incident wave changing with the machining path.