The present invention relates to a method and apparatus for tracking weld seams of a welded robot, which is provided with a distance sensor to a welder without a translational motion and image processing device, so that the welding line can be welded even when the object to be welded has deformation or is deformed by heat during welding. Accurately calculate the location to improve productivity and reduce production costs.;As described above, the present invention comprises the steps of comparing the two measurement distance values by measuring the distance between the welding object and the welder from the first and second distance sensing means attached to the welder with a predetermined angle with respect to the welding line; Determining that the welding machine is biased toward one side of the welding line when the measured distance value is large as a result of the comparison; Comparing two measurement distance values with one of the teaching distance values if the two measurement distance values are the same; If the measured distance value and the teaching distance value are not the same, correcting by moving the welding machine up and down; If the search result is the same, it is achieved by performing welding without compensation.
展开▼
