Realization of rectangular fillet weld tracking based on rotating arc sensors and analysis of experimental results in gas metal arc welding

Abstract In order to improve the welding quality and efficiency of the rectangular fillet weld in the shipyard and the steel structure workshop, reduce the labor cost, and improve the welding automation, it is necessary to study a welding robot that can track rectangular fillet weld. The working principle of the rotating arc sensor has been studied, and the mathematical model of the space posture of the arc welding gun has been established. The equivalent link coordinate systems of the wheeled mobile robot have been built, and the jacobian matrix of the robot and its inverse matrix have been calculated. The transformation from the operational space speed to the joint space speed has been realized by using the inverse matrix of the jacobian matrix, and the trajectory planning of the welding robot has been finished. The tracking algorithms of the linear fillet weld and the rectangular fillet weld have been studied, and the rectangular fillet weld tracking experiment has been done in the laboratory and the factory. Experimental results showed that the welding robot can track the rectangular fillet weld with high accuracy and good reliability.

[1]  S. Na,et al.  Mathematical modelling of rotational arc sensor in GMAW and its applications to seam tracking and endpoint detection , 2006 .

[2]  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..

[3]  Sehun Rhee,et al.  Arc sensor model using multiple-regression analysis and a neural network , 2005 .

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

[5]  Hua Zhang,et al.  Right-angle fillet weld tracking by robots based on rotating arc sensors in GMAW , 2017 .

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

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

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

[9]  G-H Kim,et al.  A study of an arc sensor model for gas metal arc welding with rotating arc Part 2: Simulation of an arc sensor in mechanically rotating gas metal arc welding , 2001 .

[10]  Gun-You Lee,et al.  Development of a High Speed Rotating Arc Sensor System for Tracking Complicate Curved Fillet Welding Lines , 2003 .

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

[12]  Ws Yoo,et al.  End point detection of fillet weld using mechanized rotating arc sensor in GMAW , 2006 .

[13]  S-J Na,et al.  A study of an arc sensor model for gas metal arc welding with rotating arc Part 1: Dynamic simulation of wire melting , 2001 .

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

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

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

[17]  Xuewu Wang,et al.  Three-dimensional vision-based sensing of GTAW: a review , 2014 .

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

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