Weld seam tracking on welding robots

Initial situation:

In assembly lines worldwide, welding robots are more and more involved. The demand for optimum productivity at a consistent quality level is continuously growing, which makes robot welding mandatory in many applications. For corresponding procedures, a path is programmed into the robot, which then is used for all parts to be welded. Due to the tolerances of the objects however, this path may slightly vary from part to part. Furthermore thermal expansion of the material during welding must be taken into consideration, as the resulting warping effect has an influence on the position of the weld seam as well.

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welding robot