Saturday, 19 March 2011

Laser cutter

Laser cutting technology refers to the use of a laser beam to cut materials. This technology has led to the invention of numerous industrial processes that have redefined the speed of production-line manufacturing and the strength of industrial manufacturing applications.

Laser cutting is a relatively new technology. The strength of a laser or electromagnetic radiation is used to cut materials of varying strength. This technology is specially used to quicken the production-line processes. The use of laser beams for industrial manufacturing applications are especially used in the moulding of structural and/or piping material. Compared to mechanical cutting, laser cutting does not contaminate the material, due to lack of physical contact. Also, the fine jet of light enhances precision, a factor that is very important in industrial applications. Since there is no wear on the laser, the computerized jet reduces the chances of the expensive material being warped or exposed to extensive heat.

Laser Cutting Process:

The laser cutting process involves the emission of a laser beam, on the stimulation of some lasing material. The stimulation takes place when the lasing material, either a gas or radio frequency, is exposed to electrical discharges within an enclosure. Once the lasing material is stimulated, a beam is reflected and bounced off a partial mirror. It is allowed to collect strength and sufficient energy, before escaping as a jet of monochromatic coherent light. This light further passes through a lens and is focused within an intense beam that is never more than 0.0125 inch in diameter. Depending on the material to be cut, the width of the beam is adjusted. It can be made as small as 0.004 inch. The point of contact on the surface material is usually marked with the help of a 'pierce'. The power pulsed laser beam is directed to this point and then, along the material according to requirement. The different methods used in laser cutting include:
  • Vaporization.
  • Melt and blow.
  • Melt, blow and burn.
  • Thermal stress cracking.
  • Scribing.
  • Cold cutting.
  • Burning.

How does Laser Cutting Work?

Laser cutting is an industrial application obtained by the use of a laser device to emit the generated electromagnetic radiation via stimulated emission. The resultant 'light' is emitted through a low-divergence beam. Laser cutting refers to the use of directed high-power laser output to cut a material. The result is quicker smelting and melting of the material. In the industrial sector, this technology is extensively used to burns and vaporizes materials such as sheets and bars of heavy metals and industrial components of varying size and strength. The advantage of using the laser cutting technology is that a jet of gas blows the debris away after the desired alteration is made, giving the material a quality surface finish.

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