Laser
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Work of art from the company THOMAS KOHLER KG., Trossingen, Germany
 It shows a combination of Laser and Water-Jet cuts.

CO2 - LASER Cutting

In general, there are various possibilities for laser cutting within machine constructions: 

1. Laser beam source fastened on tool holder:

Laser is moved in the X- and  Y-direction

2. Laser beam source fastened on MC-bridge:

Laser is moved in the X-direction, focusing is moved in the Y-direction

3. Laser beam source fastened external:

Working material is moved in the X- and  Y-direction

4. Laser beam source fastened external:

Focusing is moved in the X- and Y-direction

Solution 1 and 2 need compact and robust capsuled laser products (available in 40 W or 100 W power). They have the advantage that no external laser gas supply is needed. The gas filling has to be carried out after an operation time in full power of ca. 3000-4000 hours.

The compact and robust construction of this laser beam source enables the fitting on moveable machine parts (see construction principles 1 + 2). That also means large format cutting systems can be realised which otherwise could not be manufactured.

With our system you can choose various machine constructions depending on the application of laser
power and machine size.

Depending on the material to be cut, the following equipment is required:

      •    Lens with various focal lengths, e.g. 2.5", 5"
      •    Gas to be pressed into the cutting gap, e.g. air, N², CO²
      •    Working surface in form of a grid or hexagonal pattern
      •    Exhaust gas suction
      •    Exhaust gas filter, e.g. for toxic gases

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Various patterns made from metal or wood (1200 Watt)

Materials

Typical materials which can be cut  with a laser of  40 - 100 Watt power.

Material

Thickness (mm)

Cutting speed with 40 W CO2 Laser m/min

Thickness (mm)

Cutting speed with 100 W CO2 Laser m/min

Plexiglas

6

0.2

15

0.2

Cardboard, Paper

1

0.6

2

0.6

Wood

2

0.3

5

0.3

“Marine textiles” and other textiles

 

Test recommended

 

Test recommended

ceramic, glass, steel

 

Test recommended

 

Test recommended

The mentioned examples for material thickness and cutting speed are approximate values only and, therefore, can vary in praxis. Additionally, all the mentioned materials can be engraved or marked with a laser. The, thereby, used speed is depending on the penetration depth.
Through it’s thin cutting zone laser cutting is a high precision cutting technology. The thermal influence is limited to a very small area.

During cutting the material melts and / or vaporises. This requires, therefore, a suction system and suitable filter systems depending on the material. Several types of material produce highly toxic gases. Therefore it is not recommended to cut those materials with a laser, even if it is technically possible. In such cases we recommend to use our CAMTEC Water-Jet Systems.

The working surface is a grid.

For certain materials it may be necessary to blow gas into the cutting gap. In general it is appropriate to protect the lens system near the cutting jet from cutting fumes (blocked air). An additional gas can improve the cut result and even can prevent inflammation of the material. With some applications it is expedient to control the laser power according to the machine speed along the cutting contour. This guarantees a high cutting edge quality. 

Generally, it can be said, that a laser beam source with 40 or 100 W is most suitable for cutting procedures on cardboard, paper, Plexiglas, textiles and similar materials. Laser with 600 W, 1200 W and more are used for cutting of ceramics, glass, metals, steel or wood. Special non-ferrous metals with good conductivity such as aluminium and copper are rather difficult to cut with laser. In such cases our CAMTEC Water-Jet Systems come into operation.

The CAMTEC Laser Cutting Machines 1200 W and higher are equipped with the TRIAGON LASER Series from WB LASER GMBH, Germany.

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View into the TRIAGON 2000 (2000 Watt)

Technological Advantages

•

Space required:           1.5 x 1.2 m bis 3 kW
                                   1.5 x 1.3 m bis 6 kW

•

Helium Consupmtion:    25 Ni/h bis 2000 Watt
                                    36 Ni/h bis 3000 Watt
                                    39 Ni/h bis 6000 Watt

•

Socket efficiency:          > 12 %

•

Radial compression for a quiet and pulsation free gas circulation.

•

Oil free vacuum pump and an oil free radial compression.

•

Resonance structure in the unique ZERODUR Glass Ceramic.

•

MOS-FET high voltage mains connection

•

SMD-Micro processor control

•

Portable operation board

•

Power stability +/- 1.5% 

•

Ready to operate after only 5 minutes

•

Telephone Modem

•

Prolonged maintenance intervals