焊接导管法兰端面视觉检测工装的设计与标定  

Design and Calibration of Visual Inspection Tool for Welded Pipe Flange End Face

作　　者：罗艺进 吕政阳 张丽艳[1] LUO Yijin;Lü Zhengyang;ZHANG Liyan(College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学机电学院,南京210016

出　　处：《航空制造技术》2022年第10期113-120,共8页Aeronautical Manufacturing Technology

摘　　要：为了快速精确地获取多分支焊接导管法兰安装姿态参数,设计了一种用于导管法兰端面视觉检测的柔性测量工装,给出了测量工装的标定方法。测量工装利用卡爪夹紧导管,通过调节卡爪的伸缩以适应不同类型、不同管径的导管,同时具有良好的自定心能力。测量工装的底面有一定数量的视觉目标点,通过测量工装上的视觉目标点可以建立一个测量工装坐标系,该坐标系可以表征法兰端面的法向量、中心点位置以及法兰上圆孔的周向位置。试验证明,该方法所获得的法兰端面位置精度为0.070mm,重复定位的2倍标准差(2σ)为0.044mm。In order to obtain the installation posture of flange end faces in multi-branch welded pipelines quickly and accurately,a flexible measurement tool,together with a calibration procedure,is proposed for visual inspection.Each flange end face is fixed by the measurement tool’s claw,whose scalability could adjust to various types of pipelines with different diameters.In addition,the measurement tool possesses a good self-centering capability.A number of visual target points are laid on the bottom of the measurement tool.By visually measuring the target points on the calibrated measurement tool,a measurement coordinate system can be built up,which could represent the normal vector,the location of center point and circumferential position of the flanges.The experiments show that the absolute location accuracy of the flanges end faces is 0.070mm,and the double standard deviation of repeated positioning is 0.044mm.

关 键 词：多分支焊接导管 法兰端面 测量工装 三维重建 标定 

分 类 号：V261.34[航空宇航科学与技术—航空宇航制造工程]