Research on Detection of Skin Seam Based on 3D Laser Scanning
YAN Cheng1, HUANG Xiang1, LI Shuanggao1, LI Dong2
(1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics,Nanjing 210016, China;
2. AVIC Jiangxi Hongdu Aviation Industry Group Company Ltd., Nanchang 330024, China)
Concerning the difficulties such as large errors and low efficiency in traditional detection method of the skin seam and the defects based on 2D laser scanning, a method of the skin seam based on 3D laser scanning is proposed and corresponding software is developed. Methods and steps of de-noising, critical points recognition and extraction for the skin seam testing based on 3D point cloud are proposed. Based on the influence of gap and flush on the aerodynamic shape, the actual geometry structures are analyzed. Compared with theoretical structures, the mathematical model of gap and flush is established. The calculate accuracy is verified through experiments of simulation work piece. Field experiments show that the detection method is feasible and compared with two-dimensional laser detection, the accuracy and repeatability are better. The gap measurement accuracy reaches 0.04mm as well as the flush measurement accuracy reaches 0.02mm, which meet the needs of the skin seam detection and provid the numerical basis for the analysis of the influence of gap and flush on the assembly quality.
严 成1,黄 翔1,李泷杲1,李 栋2. 基于三维激光扫描的蒙皮对缝检测研究*[J]. 航空制造技术, 2017, 60(10): 70-74.
YAN Cheng1, HUANG Xiang1, LI Shuanggao1, LI Dong2. Research on Detection of Skin Seam Based on 3D Laser Scanning. Aeronautical Manufacturing Technology, 2017, 60(10): 70-74.