Spot welding and seam welding with lasers
With laser welding, you can create single joining spots or weld in continuous wave mode. The weld geometry describes how the parts fit together. For example, they may overlap or butt up against each other. The mechanical properties are the first thing to consider when defining the weld geometry.Is a continuous weld required, or will the weld consist of individual welding spots? Is the weld made up of a large number of short lines or lots of small circles? Here, too, the decision of which type of weld to use depends on two important factors: the required strength of the weld and the maximum amount of heat input into the component.
Different kinds of joints require different operation modes of the laser device.
Continuous wave mode
In this mode the laser medium is pumped continuously and emits a continuous laser beam.
In pulsed mode, the gain medium is pumped in bursts to generate short laser pulses. Power, duration and frequency of the laser pulses are important parameters for material processing.