Welding
with Diode Lasers

Laser welding with one of our lasers is characterized by high strength and low distortion. Even at high welding speeds, excellent seam surfaces can be achieved on the components.

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Joining in the Industry

Hardly any industrial branch today can do without laser welding, because in almost every manufacturing process there are metals or plastics that have to be joined. Laser beam welding is ideally suited for this purpose, especially when high welding speeds, narrow weld seams and low thermal distortion are required.

Diode lasers are used in many laser-assisted joining processes. A distinction is made between laser soldering, heat conduction welding and deep welding with lasers.

Laser beam soldering generally involves melting an additional material. This filler material wets the surfaces of the components to be joined and thus joins them after solidification. This process is mainly used in the automotive industry for joining steel bodies.

Heat conduction welding and deep penetration welding, on the other hand, cannot be directly assigned to any industry or individual application. From control cabinets to sensor housings, bellows, electronic devices, batteries, sheet metal in various applications, coated and uncoated sheet metal, heat exchangers, saw blades and band saws, thick sheet metal in shipbuilding, drinking water pipes, sinks, tailored blanks, steel and aluminium car bodies, beer barrels and much more is welded and joined with the diode laser.

Process Engineering

Due to process-related advantages, such as high welding speeds or high degrees of automation, laser beam welding is increasingly assuming a key function in production technology. By means of narrow, almost parallel seam flanks, resource-saving seam preparations can be used which result in low shrinkage. The latter can also be implemented using laser-MSG hybrid welding, which combines the advantages of two different welding processes through synergy effects. In particular, this ensures greater gap bridging capability and consequently reacts insensitively to tolerances within the weld seam preparation.

Materials Engineering

Irrespective of sheet thickness and component geometry, different material combinations ranging from unalloyed and high-alloy steels to non-ferrous metals can be welded without irregularities. In addition to these, different material pairings are becoming increasingly important in today's application technology. The mechanical-technological properties to be fulfilled, such as for tailored blanks, are at the forefront of the respective joining task. These correlate with the respective heat guidance of the process, which can be influenced by special optics or the feeding of cold or hot wire.

LDF Diode Lasers in Car Body Construction

A central application field for Laserline's diode lasers is the joining of shell components in the visible area of the vehicle, e.g. tailgates, roof seams, doors or C-pillars.

Besides the requirements of higher firmness and possibly a small heat-affected zone, as far as these visible seams are concerned, particularly high demands are made on the appearance of the welding seam.

Laser Remote Welding

To reach a quicker and more flexible process control when welding vehicle bodies or ships’ sides, laser remote welding is increasingly used. Because the laser beam is here directed from a distance of over one meter onto the workpiece, the application requires the combination of high laser power and high beam quality. Laserline LDF diode lasers with beam converter offer an optimal system solution for this special manner of keyhole welding.

Welding Tailored Blanks

At the laser-based tailored blanks welding using several sub sheets, shaped blanks are put together that will later be transformed to car body parts. However, the process is often afflicted with inefficient and easily soiled lasers that furthermore leave unpleasant metal splashes on the sheet and welding optic. Laserline's diode lasers generate an extremely calm molten pool that hardly creates a splash. They also resist dust and moisture-intense process environments.

Interested in our diode laser systems for applications in industrial materials processing?
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