Right-angle fillet weld tracking by robots based on rotating arc sensors in GMAW

In order to improve the quality and the efficiency of welding right-angle fillet weld, reduce the labor intensity of workers, it is necessary to research the tracking algorithm of right-angle fillet weld. The mathematical model of the space posture of the arc welding gun was established, and the recognition algorithm of the inclination angle of the arc welding gun was designed. When the welding robot was welding right-angle fillet weld, the path planning of the robot was studied. By using the method of pattern recognition, the cross point of right-angle fillet weld was identified accurately. The realization algorithm of right-angle fillet weld tracking was studied, and the welding speed was a constant. Tracking experiment of right-angle fillet weld was done in the laboratory and shipyard, and experimental results showed that the robot could track right-angle fillet weld with high accuracy and good reliability by using the designed algorithm.

[1]  Yanling Xu,et al.  The acquisition and processing of real-time information for height tracking of robotic GTAW process by arc sensor , 2013 .

[2]  Kyu-Yeul Lee,et al.  Development of a mobile welding robot for double-hull structures in shipbuilding , 2007 .

[3]  Hua Zhang,et al.  Circular fillet weld tracking in GMAW by robots based on rotating arc sensors , 2017 .

[4]  Yanling Xu,et al.  Research on the Real-time Tracking Information of Three-dimension Welding Seam in Robotic GTAW Process Based on Composite Sensor Technology , 2012, J. Intell. Robotic Syst..

[5]  Yanling Xu,et al.  Computer vision technology for seam tracking in robotic GTAW and GMAW , 2015 .

[6]  Yanling Xu,et al.  Real-time seam tracking control technology during welding robot GTAW process based on passive vision sensor , 2012 .

[7]  Y. F. Gao,et al.  Welding Gun Inclination Detection and Curved Fillet Weld Joint Tracking , 2009 .

[8]  Luigi Nele,et al.  An image acquisition system for real-time seam tracking , 2013 .

[9]  Bo Chen,et al.  A study on application of multi-sensor information fusion in pulsed GTAW , 2010, Ind. Robot.

[10]  Tao Lin,et al.  Real-Time Seam Tracking Technology of Welding Robot with Visual Sensing , 2010, J. Intell. Robotic Syst..

[11]  Bo Chen,et al.  Modeling of underwater wet welding process based on visual and arc sensor , 2014, Ind. Robot.

[12]  Wang,et al.  Design of Robot Welding Seam Tracking System with Structured Light Vision , 2010 .

[13]  Jian Le,et al.  Space curved fillet weld joints tracking by robots based on rotational arc sensors in gas metal arc welding , 2016, Ind. Robot.

[14]  Shanben Chen,et al.  Multi‐sensor information fusion in pulsed GTAW based on fuzzy measure and fuzzy integral , 2010 .

[15]  Wen Wan,et al.  Autonomous seam acquisition and tracking system for multi-pass welding based on vision sensor , 2013 .