CO2-Laser Applications

CO2 LASER APPLICATIONS

Laser and process gases for CO2-laser cutting and welding

The laser technology is a versatile tool for numerous industries and application. Whether it is in material processing in the automotive-, aircraft- or ship-building, in the semiconductor industry, in medicine or in food technology, lasers of various types are used everywhere.

CO2 Lasers

The most commonly used type of laser by far is the CO2 laser. In this technology the laser beam is generated by using a three-component gas consisting of helium, nitrogen and the component that gives the system its name, CO2. The wavelength of the CO2 laser light is 10.6 μm and invisible to the human eye. Mirrors and lenses are utilized to direct and shape the laser beam. A very special CO2 Laser in terms of efficiency is the diffusion-cooled configuration.

Operating gases

The term “operating gases” refers to gases required to generate the laser beam. These gases need to be extremely pure and free of disruptive contaminants in order to guarantee perfect operation of the laser.

Gas Purity

- CO2 4.5

- N2 5.0

- He 4.6

Depending on the equipment configuration, the laser gas is either produced from the three components in an internal mixer or directly used from a premixed product. Due to the better reproducibility, the latter option became the preferred approach. With the Lasline® products Messer offers an extensive selection of Laser gases.

For proper operation conditions the gas supply system needs to satisfy the purity requirements of the applied gases. In general, the composition of the gas mixture depends on the type of laser. The exact composition is specified by the manufacturer. A change in the composition can impair performance or damage the resonator.

- Lasline By for Bystronic lasers

- Lasline Fa for Fanuc lasers

- Lasline Ha for Haco lasers

- Lasline Pa for Panasonic laser

- Lasline for Trumpf lasers

- Lasline Rofin for Rofin Sinar Slab lasers

- Lasline Standard for different laser types

Process gases / cutting gases

Cutting gases are selected according to the material to be processed. Materials which are suitable for flame cutting are treated with pure oxygen. Thereby the purity of the gas can have a strong impact on the cutting speed. Due to the high purity of Oxycut®, the cutting speed can be increased by up to 20%, depending on the thickness of the sheet or plate.

Most of the materials which are not suitable for flame cutting are pretreated with nitrogen. Based on the inert properties of nitrogen the resulting cutting surface will be oxide-free. However, slight contamination by oxygen or moisture causes discoloration on the cut surfaces. Nitrocut® ensures to obtain high quality cut surfaces.

Titanium, tantalum and magnesium are examples of materials that form nitrides, as they undergo strong reaction with nitrogen. In order to weld these materials without performing post-processing operations such as milling, grinding or pickling, it is recommended to use argon for cutting.

Gas applications Gas quality recommandations

GAS QUALITY RECOMMANDATIONS

Gas quality recommandations

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