In spite of being the oldest form of gas lasers, CO2 laser cutter are still considered one of the most valuable types of lasers. Also, it is included in the list of supposed versatile lasers since it is actually helpful in several applications and procedures. It is made of a combination of various chemical components. Apart from carbon dioxide, nitrogen and helium are present at the outlet as well. The ratio of these 3 components is 9.5: 13.5: 77. These have various roles to play in the technique. It is in nitrogen where the energy is engaged before it ignites carbon dioxide. Since CO2 produces a laser, nitrogen carries on igniting it. The role of helium is seen through the process of heat transfer.

Different Types of CO2 Lasers

The basic types of carbon dioxide lasers are divided into three. First, there is the axial gas flow that pumps the mixture of carbon dioxide, helium and nitrogen from one end of the tube before it exits towards the other. To ensure that the flow is maintained well, carbon dioxide is continuously pumped into the pipe. The role of helium and nitrogen in the procedure is to improve efficiency. The length of this carbon dioxide laser can be condensed with the help of folded optical methods. Also, there is a CO2 laser cutter of transverse gas flow. The gas flow for this technique is horizontally done. A third type well-known as the sealed tube is available as well. This is just same as the sealed argon and krypton lasers sealed with helium and neon. It is not filled during the process.

Different Construction Materials for CO2 Lasers

In addition to these types are various construction materials to take into account. The mirrors, for instance, use silicon, gold, and molybdenum, all coated. For windows, germanium and zinc selenide are used in construction. In some cases, the diamond can be used in the production of windows or mirrors. Some of the traditionally produced optical elements were made of sodium or potassium chloride. Currently, these materials are no longer used because, in spite of their low cost, production degrades rapidly, in particular when there is moisture in the atmosphere.

Benefits of CO2 Lasers

The cutting quality of a CO2 laser remains constant in all ranges of material thickness, while a fiber laser is a better cutter in the range of thin material, but begins to lose the quality of cutting when the thickness of the material exceeds 5 mm. Although fiber optic provides performance advantages in the range of thin material, CO2 lasers surpass them when the thickness of the metal that is cut exceeds 5 mm. While this can be true when comparing most fiber lasers to CO2, in several units the common consensus of fiber cut quality can vary. In 2kW IPG’s fiber laser units have been shown to reach a cutting quality equal to or better than the CO2 laser up to 12 mm in mild steel. With this thickness, the laser cut at the similar speed as CO2 and the power consumption per cut was even lower using fiber technology. Check this site.

Conclusion

In general, CO2 laser cutters are used in cutting, engraving, and heat treating, as well as welding. In addition, they are significant in the production of cardboard, fabric, paper, plastics, wood, and ceramics. They can also be used in medical fields especially in the world of dermatology. Dermabrasion, laser surgery, and skin rejuvenation are some of the examples in this application.

June 3rd, 2018

Posted In: Cutting Ideas

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Laser cutting is used to cut any number of items from a variety of materials, such as clock faces, jigsaw puzzles, metal tags, packaging, machinery parts and components, signs, leather upholstery pieces, patterns, and more.

According to Coherent, a company that manufactures laser cutting machines, laser cutting may:

“… Concentrate a greater amount of energy towards a small and well-defined identified spot. The heat energy result, created through the laser, will vaporize the  materials in it as a small-defined place and gas, and/or a mixture of different  gases, like CO2, Oxygen, nitrogen, or even helium is then used in blowing out the material that was being vaporized by the kerf. The energy of the beam is applied right away and directly to where it is really needed, minimizing the HAZ or the Heat Affected Zone.”

Laser cutting is a process where a laser beam is used to heat a piece to the point where it is precisely severed. According to Answers.com, laser machines include a high-powered laser and a computer to direct the laser beam onto the material to be cut. From there, the laser beam melts, vaporizes, or burns the material along the predetermined cut line, resulting in a precise, neatly cut edge.

Laser Cutting Applications

Laser cutting is used by manufacturers, small businesses, schools, and hobbyists alike. According to Coherent, common items suitable for laser machine include:

  1. Thicker non-metal materials– You’ll need a laser cutter with an average power of between 250 to 500 watts (up to 1500 watt peak power) to cut thicker non-metal materials such as thicker plastics and wood up to one inch thick. In general, lower power lasers will have to work harder to make the same cut. This reduces cutting speed and can result in excessive heat, chemical changes, or damage to the Heat Affected Zone.
  2. Thin and non-metal form of materials– Fabrics, most plastics, papers, polycarbonate,  mylar stencils, wood that up to.04 more inches, and thin acrylics can be cut with a 150 watt average power (450 watt peak power) laser.
  3. Metal materials– Metal materials generally require higher power lasers between 150 and 1,000 watts (up to 2500 watt peak power). Some thin metals (such as stainless steel or cold rolled steel) can be cut with 150 watt lasers when oxygen-assist gas is used.

When it comes to cutting metal, wood, glass, and other hard surfaces, it’s hard to imagine a beam of light being able to keep up with a spinning blade. A traditional beam of light would indeed have a tough time. That said, a concentrated laser beam makes cutting a breeze. for additional tips, learn more information at http://hackaday.com/2017/07/12/laser-cutting-orreries/

Advantages of Laser Cutting

Laser machine do not wear due to cutting, resulting in less strain on the cutting equipment. Laser cut edges are clean. In addition to cutting items, lasers can also cut small, highly detailed holes with good edge quality.  The laser machine has come of age and are proven to be a reliable, advantageous alternative to other cutting methods.

Finally, laser offers numerous advantages over other types of cutting. Not only can you cut a variety of materials such as paper, plastics, cardboard, leather, and metal, lasers are extremely precise. Once a pattern is programmed into a laser cutter, it will continue to cut an exact copies piece after piece.

July 18th, 2017

Posted In: Cutting Ideas

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