Laser welding of metal and plastic

Laser welding

- High quality of the resulting weld joint
Laser welding allows to produce high quality weld joints requiring no additional processing.
- Non-detachable weld joints
The strength of the resulting weld joint in laser welding is comparable to the strength of the material, which results in non-detachable weld joints (under mechanical stress the break occurs outside the weld joint).
- High controllability of the welding process
The equipment for laser welding allows to control a wide range of main welding parameters, resulting in high flexibility of the welding process.

Laser welding is a modern technology used to obtain permanent connection of parts, mostly made of metal or plastic. The high energy concentration in the radiation beam produces deep, narrow weld joints ensuring the highest quality of welding. Laser welding technology is effectively used in batch production.

Spot laser welding

Spot laser welding has spread due to the emergence of solid-state lasers capable to operate in pulsed mode. This type of welding is widely used in microelectronics and precision instruments industry. Precision laser welding is mainly used for welding of thin sheet materials (0.1 ... 1.4 mm). The efficiency this method of processing is determined by the frequency of pulse generation.

Seam laser welding

Seam laser welding provides a strong mechanical connection, as well as a high tightness of the weld joint. Seam welding is performed both using continuous radiation laser sources, and pulse radiation with high frequency of pulse generation.

Peculiarities of laser welding

When using continuous laser welding the quality of the resulting welded joint can often exceed the strength of the welded material. This peculiarity is caused by changes in the structure of the material, which consist in degassing and obtaining of fine-grained structure of the welded material. Pulse mode laser welding is mainly used for welding of thin materials, while the continuous mode is used for deep welding. Laser welding is a versatile technology that is applicable for welding of carbon steel, stainless steel, aluminium, titanium, plastics and other materials.

Advantages of laser welding

- Ability to weld in the air (no vacuum or special conditions).
- Small spot diameter, eliminating deformation of welded parts, and ensuring a high quality of the weld joint and processing accuracy.
- Absence of contact of the process enables welding in hard-to-reach areas.
- Flexible adjustment of welding parameters
- High quality of resulting welds
- Safety and absence of harmful radiation