Laser seam welding of sheets of zinc-coated steel – a combination of metals with disparate melting and evaporation properties – used to be a major challenge for the automotive industry. A newly developed process enables significantly higher welding speeds than is otherwise possible with conventional mono-focal laser beam welding systems. With the new process, the beam to be measured is deflected through the measuring device without ever touching it. The Rayleigh scattering of the laser beam is measured by a camera in the X and Y directions.
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