Laser Welding

Laser welding is a technique used to join multiple pieces of metal through the use of a laser. The beam provides a concentrated heat source, allowing for thin, deep welds and high welding rates. The process is frequently used in high volume applications.

The spot size of the laser can vary between 0.2 mm and 13 mm, though only smaller sizes are used for welding. The depth of penetration is proportional to the amount of power supplied, but is also dependent on the location of the focal point; penetration is maximized when the focal point is slightly below the surface of the work piece.

Advantages of Laser Welding

• Minimal amount of heat that is added during processing.
• The repeated "pulsing" of the beam allows for cooling between each "spot" weld, resulting in a very small "heat affected zone".
• Ideal for thin sections or products that require welding near electronics or glass-to-metal seals.
• Low heat input, combined with an optical (not electrical) process, also means greater flexibility in tooling design and materials.
• Laser welding can be used to join dissimilar metals as well, such as copper to stainless, or stainless to certain types of phosphor bronze. There are many combinations that work well.
• 304 and 304L series stainless weld extremely well.
• The laser process can also be applied to titanium, kovar, copper and certain aluminums.