Laser welding
Our company offers high production capacity with a robotized cell which focuses on laser welding with a high power fibre laser with optical guidance to the point of welding.
New and constantly increasing requirements of production practice drive the quantitative and qualitative growth of advanced welding technologies in engineering production. In the field of technologies for joining metallic materials, there is a constant development, which is influenced both by these growing requirements and by the ever-increasing demands on the technological infrastructure necessary for laser technologies.
Technical parameters
-
- Welding thicknesses ranging from 0.5 mm to 8 mm
- Welding a wide range of materials and their combinations
- Source power 4000 W
- Pulse welding mode
- Continuous welding mode
- Possibility of using additional material
- Welding in a protective atmosphere
- maximum length 2000 mm
- maximum width 800 mm
- maximum weight 1000 kg
- possibility of welding rotary joints
- Advantages of laser welding
- Minimum amount of input energy required to melt the welding surfaces
- Possibility of achieving narrow and deep penetration of the material
- Minimum deformations and low residual stresses caused by welding
- High labor productivity
- Possibility of welding in hard-to-reach places
- Possibility of using a combination of welded materials
- High visual quality of weld joints without mechanical processing
The basis of laser operation is light amplification by stimulated emission of radiation – Light Amplification by Stimulated Emission of Radiation. As such, a laser is essentially a wave of an optical type that belongs to the group of electromagnetic radiation and differs from other types of radiation in terms of wavelength. It is characterized by high coherence, monochromaticity and parallelism of emitted photons. The laser beam is generated in the welding source, from which it is guided through an optical fiber to the laser – welding optics. In this optic, the laser beam beam is directed and focused by means of lenses. The output from the welding optics is therefore a focused laser beam, part of which is reflected when it hits the base material (depending on the material being welded), part passes through the material itself and part is absorbed.
The absorbed energy causes melting of the material and its evaporation. Melting and evaporation of the material are accompanied by various effects, e.g. formation of ionization and plasma cloud above the material. The heat affected area – TOO may differ from the theoretically predicted bundle trace diameter (depending on the optics used and the diameter of the optical fiber) due to radiation absorption. Its size and the resulting effect of radiation is primarily determined by the power of the laser source, the areal density of the radiation power, surface conditions and thermal properties. In general, however, the TOO area is very small when using a laser beam, which results in minimizing deformations after welding and thus the necessity of further operations such as machining.