Theme of this task is remote laser welding with adaptive seam tracking. The system
consist of robot arm, fiber laser with power of 400 W, laser head, camera and
computer with video signal and laser head controlling software. Remote Seam
tracking is based on triangulation and active surface lighting.
The system we used, which is still in development phase, has been experimentally
characterized from the perspective of seam tracking, distraction time response and
optimal welding speed of 1.5 mm thick stainless steel plate. Based on macrographic
images of welds, we got to the point, that laser welding optimal speed is 60
cm/min, which is 50% higher than theoretical value (40 cm/min). Furthermore, we
found out that seam tracking precision is 0.063 mm, time response with absolute
controlling is 36 ms, and 270 ms with PID controller.