For welding and cutting

LaserSan®

Gas and mixtures for laser cutting and welding.

Competence in laser gases and process

The laser cutting of metals requires high purity gases and mixtures for both the resonator and the process gas. Nippon Gases has decades of experience in the production of gases and has available a portfolio of clean gases and mixtures that meet the requirements of all machine suppliers.

Cutting with lasers

Today, new cutting lasers are often supplied with fiber laser technology after many years of the industry using CO₂ lasers for cutting.

In the fibre laser, the laser beam is guided via the fibre cable to the cutting head. This means that there is no need for resonator gas, mirrors and beam tubes, which simplifies maintenance.

CO2

CO2 have a responsibility to create light emission for effect of energy excitation, that after polarisation, became laser beam.

The job of this gas is double, into the source accumulate electron to move to CO2 when It needs to maintain excitation itself, in second as protection of metal sheet during the cutting process.

Used into the laser source, the effect is to maintain system cooled.

Normally Oxygen is a problem on laser cutting process, but, as in oxyfuel cutting technology, for to cut carbon steel, the function of Oxygen is to burn the Carbon present into the middle steel to help the fusion.

Argon

Argon is used for laser cutting of titanium and for laser welding.

The laser cutting is constantly evolving and is moving towards high-quality applications, on a wider range of thicknesses and with good economic results, on batch processing with greater quantity of pieces.

Metal reactivity

Every single material requires a
specific root protection gas.

Carbon steel, stainless steel, aluminum, titanium and
many others have metallurgical different characteristics
and a reactivity towards air.

During the laser cutting or welding phases it is essential
to protect or bring heat to allow the process, while the
absence of pollutants allows to exploit all the power of
the laser sources, whether CO2 or fiber.

Gas distribution systems

To supply gas to a laser cutting system it is essential to know fluid dynamics. In fact, it is essential to guarantee high flow rates at high pressures without affecting the machine with pressure changes.

Pressure control panel

It is equally important to maintain the purity of the gases contained in the containers up to the point of use. In this case too, the experience and passion that distinguishes Nippon Gases have allowed us to design specific equipment for gas management.

Laser cutting

Thanks to the extremely precise focus that is possible with laser beams, it is possible to achieve narrow and parallel cutting edges, greatly reduced areas that are exposed to thermal stresses, limited thermal deformations, the possibility of use on complex profiles and with a very small radius of curvature. (even with sharp edges)

In reality, laser cutting produces finished workpieces that do not require further machining (eg drilling holes) or finishing (eg grinding etc.). In systems that use CO2 sources, the laser beam should be aimed at the focus lens using a mirror. It is important that no pollutants (dust, hydrocarbons, etc.) settle on these components, as this will result in greater absorption of the incoming force.

This would not only reduce the laser arriving to the material to be processed, but would also cause variations in the transmission conditions and beam focus.

The optical path

It is important that the entire optical path, from the source to the focusing element, is hermetically closed, and a protective gas (air or nitrogen) flows in slightly overpressure.

This gas must be filtered for dust (diameter <0.1 μm, density <0.1 mg / Nm3) and de-oiled (content <0.01 mg / Nm3). Many times, the failure to comply with this condition leads to serious problems in terms of reliability of the performance of the system.

Form of supply

Cylinder

Packaged

Testing

Do you still have questions?

Contact with us.

In Nippon Gases we have developed various qualities of gases to adapt to your applications. Call us or write to us and we will help you get the most out of it.