Initial situation:

Optical Weld Seam Tracking

In welding processes, the correct position of the welder is critical for the quality of the weld bead. Traditionally the tools are not guided at all, or just by a mechanical pin. These pins only guide in x position; and the height of the welder is often not known. Therefore an optimum current cannot be achieved. The pins often get stuck or brake. A non-contact optical measurement system will not have these problems, and will additionally deliver x and z position for the welder to use.

Particular challenges

Optical weld seam tracking is real-time tracking of the position where the weld is going to be applied. Guided by a QuellTech Q4-60 Laser Scanner, a robot or machine can adjust its path accordingly. During this procedure, it is also possible to adjust several parameters like driving speed, wire feed speed or current, to achieve optimum weld bead formation. Thanks to these adjustments, seam tracking delivers fewer spatters, continuous bonds and uniform heat level. Unlike tactile probes, non-contact optical seam tracking can be programmed to track just the welding seam and skip the tack welds that would throw any tactile-based system off.

QuellTech solution

Contactless QuellTech Laser Scanners, based on dedicated tracking software, can extract the coordinates to be applied in real time. By means of the selected algorithm, it is possible to track middle and upper or lower corners of the gaps depending on the need. QuellTech is able to design and produce task-specific, tailored laser scanners on demand, covering the entire range from very thin beads to large multi-pass welding.

Benefits for the client

The client can achieve a better seam quality, a faster path completion, and accurate seam positioning. Furthermore, errors due to thermal warping are minimized.

Is the QuellTech optical weld seam tracking laser suitable for your particular application? 

Feasibility studies for the particular task can be performed beforehand. Initial test measurement (free of charge). Simply send us a corresponding sample. Flexible and affordable adaptation to customer specific requirements within a short delay. Safe and reliable products, proven in practical applications.