Laser positioning and laser tracking technologies enable robots to identify weld seams using lasers and perform welding based on manually taught welding trajectories. It's like giving the robot a pair of "eyes".

During the manual teaching process of welding, the weld seam is susceptible to deformation, gap variation, and assembly errors, leading to significant deviations in the weld seam during the welding process. In order to improve the welding quality, the welding robot needs to be controlled in real time to correct the weld seam deviation.

Principle of Laser Weld Seam Inspection

A laser diode emits laser beams onto the surface of the workpiece. The laser beam is reflected on the surface and forms an image on a CCD or CMOS sensor. The image data is then communicated to a controller, which processes the image to determine the position of the weld seam. This information is used to control a robot for tracking or positioning.

Actually, most of the welding robots in the current market use the "teach and playback" mode for operation, with a few utilizing trajectory planning. In other words, regardless of the type of product, welding processes are carried out based on design data. First, a predetermined theoretical program is written, and then the welding operation takes place. For large batches of identical workpieces, laser positioning or tracking technology is often used to determine the welding trajectory. Due to potential errors in mass production, laser correction is necessary to ensure a welding qualification rate of over 90%.

Laser Calibration

The calibration process includes diagrams and written instructions, and it is relatively simple and easy to get started as long as you can understand the weld seam recognition image on the PC.

Laser Positioning

Please refer to the following video.