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Contour & quasi-simultaneous welding These two processes show presently the best market presence. With contour welding, the laser beam follows the welding seam, similar to metal welding. Almost any work piece size can be welded. The limits for this technique are set by the tolerable gaps. With quasi-simultaneous welding, the laser beam passes over the entire welding contour several times very rapidly. Beam deflection is done using galvo scanning heads and therefore higher beam quality is essential. The entire welding path melts quasi-simultaneously due to heat buffering and allows the layers to move against each other easily. The pressure on both layers and a suitably designed sacrificial region can bridge larger gaps. On the one hand, quasi-simultaneous welding requires higher laser power; on the other hand, it allows even distortion-free energy input.  |
