Types of Lasers Used in Laser Cutting Process
LASER is a short form which stands for “Light Amplification by Stimulated Emission of Radiation.” Laser cutting is a process that utilizes a focused and magnified beam of light to create heat and pressure which then helps to reshape the material into a different shape with great precision as its cutting head moves over the surface. The thermal power produced by the laser beam helps the material to melts material, while a mixture of gases forced through the burndown tip of the machine removes the molten metal. Laser cutting in Melbourne has been in use since the ’60s but these days it is as important as it has ever been due to its expanding usage within industrial processes. Laser technology serves a variety of functions including engraving, drilling, and cutting depending on the power of the laser, the main element material it uses to produce the laser beam, and the substance it is acting upon. Laser cutting in Melbourne is one of the most important processes to make sheet metal parts. Differences in laser cutters occur from the types of lasers in the machines, and the kind of laser regulates the type of thickness of the material the laser may be able to cut. A high-powered laser will be good for professional applications where large portions of plastic or metal need to be cut. Whereas on the other hand, a low-power laser is good for thinner materials like wood, card stock, plastic, and paper.
There are 3 types of lasers: CO2 (gas lasers), Fibre lasers, and Nd: YAG or Nd: YVO (vanadate crystal lasers).
Each uses a different base material to encourage the laser either electrically using a gas mixture or passed through natural diodes.
CO2 Lasers: A CO2 laser manages electricity with the help of a gas mixture-filled tube, generating light beams. These gas mixture-filled tubes contain mirrors on each end. One of the mirrors is partially reflective and the other is full which lets light come through. The gas mixture used in these tubes is usually nitrogen, hydrogen, carbon dioxide, and helium. The CO2 lasers emit invisible light, in the far-off infrared range of the light spectrum. This type of laser is commonly used for working with paper or wood, Polymethylmethacrylate, and other plastics. It can also be used working with fabric, leather, and similar products. CO2 lasers can process metals also, but they are generally best for non-metallic materials. It can usually cut thin sheets of aluminum and other non-ferrous metals. You can enhance the power of the CO2 beam by enhancing the oxygen content, although this can be risky.CO2 laser has sufficient energy to pierce through a thicker material compared to a fiber laser keeping the same power. It also gives a softer finish when used to cut thicker materials. CO2 lasers are the most used laser cutters because they are inexpensive, efficient, and can be used to cut different materials.CO2 lasers are available with different beam movement formations to create a continuous cut.
Fiber Lasers: This is a part of the solid-state laser group and uses the seed laser. They magnify the beam using specifically designed glass fibers which derive energy from pump diodes. They are also the most expensive of the different laser-cutting devices. These types of lasers are generally maintenance-free and contain a long life of a minimum of 25,000 laser hours. As compare to the other two types of lasers, fiber lasers have a far longer lifecycle and can produce strong and stable beams. Fiber lasers work with alloys, metals, and non-metals alike, glass, wood, and plastic. Fiber lasers do not have moving parts, are around 2-3 times more energy-efficient, and can also cut reflective materials as compared to Gas lasers. They are good to work with both metal and non-metal materials. Fiber lasers require less maintenance therefore offer a cheaper and long-lasting service compared to gas lasers.
Nd: YAG/Nd: YVO Lasers: Crystal laser cutting processes can be in nd: YAG (neodymium-doped yttrium aluminum garnet), but more frequently they tend to use nd: YVO (neodymium-doped yttrium ortho-vanadate, YVO4) crystals. Crystal laser cutters produce beams from nd: YAG (neodymium-doped yttrium aluminum garnet) and nd: YVO (neodymium-doped yttrium ortho-vanadate). These devices allow an exceptionally high cutting power. This machine is very expensive- it does not mean that their initial price is high instead they have a life expectancy of 8000 to 15000 hours. These lasers are commonly useful for a huge range of applications, from medical to military and manufacturing. Nd: YVOshows higher pump absorption and gain, a broader bandwidth, broader wavelength range, a tinier upper‐state lifetime, a more refractive index, and less thermal conductivity. When it comes to constant operation, Nd: YVO has an overall same performance level compared to Nd: YAG in cases with medium or high power. Nd: YAG/Nd: YVO Laserscan be used with both metals and non-metals, including plastics. It can also process a few ceramics materials under some specific circumstances. They can cut all through stronger and thicker materials because they do have smaller wavelengths as compared to C02 lasers, which implies they have a greater intensity. Because of their high power, their parts wear out quickly as compared to other lasers.
In Accugroup out of these three, C02 lasers are used mostly for laser cutting in Melbourne, by both professionals and manufacturers, and in other parts of Australia. They are mainly used for cutting non-metal materials, and even though they have developed to cut through metals, they are still better suitable for non-metals and organic materials like rubber, leather, and wood, leather, rubber, and engraving hard materials. Accugroup professionals have clear knowledge about these lasers and are clear about using them.