CNC Laser Cutting

CNC stands for ‘Computer Numerical Control’. That means computer has the ability to change the design patterns into numbers, produced by Computer Aided Design Software (CAD). These converted numbers control the movement of the cutter. In this way, computer controls the cutting and engraving of the objects. A CNC Laser Cutter allows for extremely precise cutting and engraving of many materials such as wood, foam, concrete, different metals and many others. It contains a sharp and pointed router to produce clean and exact cutting of the material. This sharp cutter can even cut most organic materials and depending on the power metals as well.

  • High accuracy.
  • Excellent cut quality.
  • High processing speed
  • Very small heat-affected zone compared to other thermal cutting processes
  • Very low application of heat, therefore minimum shrinkage of the cut material.
  • Easy and fast control of the laser power over a wide range (1-100%) enables a power reduction on tight or narrow curves.
  • High-pressure laser cutting with nitrogen enables oxide-free cutting.
Lasers are used for many purposes. One way they are used is for cutting metal plates. On mild steel, stainless steel, and aluminum plate, the laser cutting process is highly accurate, yields excellent cut quality, has a very small kerf width and small heat affect zone, and makes it possible to cut very intricate shapes and small holes.
  • Depending on the material to be cut the cutting methods used differ :

  • Fusion Cutting ( high pressure cutting):

  • The material is fused by the energy of the laser beam.

  • The gas, in this case nitrogen at high pressure (10 to 20 bar), is used to drive out the molten material from the kerf.

  • The gas also protects the focusing optics from splashes

  • This cutting method protects the cut edges from oxidation and is mainly used with stainless steels, aluminum and their alloys.
    II. Oxidation cutting (laser torch cutting):
  • The material is heated by the laser beam to combustion temperature.

  • The gas, in this case oxygen at a medium pressure (0.4 to 5 bar) is used to oxidize the material and to drive the slag out of the kerf.

  • The gas also protects the focusing optics from splashes.

  • The exothermic reaction of the oxygen with the material supplies a large part of the energy for the cutting process.

  • This cutting method is the quickest and is used for the economical cutting of carbon steels.