A robot performs remote fibre laser welding. The beam provides a concentrated heat source, allowing for narrow, deep welds and high welding rates. The process is frequently laser beam cutting pdf in high volume applications using automation, such as in the automotive industry. It is based on keyhole or penetration mode welding.
The spot size of the laser can vary between 0. 2 mm and 13 mm, though only smaller sizes are used for welding. A continuous or pulsed laser beam may be used depending upon the application.
Millisecond-long pulses are used to weld thin materials such as razor blades while continuous laser systems are employed for deep welds. LBW is a versatile process, capable of welding carbon steels, HSLA steels, stainless steel, aluminum, and titanium.
Due to high cooling rates, cracking is a concern when welding high-carbon steels. The weld quality is high, similar to that of electron beam welding. The speed of welding is proportional to the amount of power supplied but also depends on the type and thickness of the workpieces.