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.
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.
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.
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.
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.
Laura Jones June 3rd, 2018
Posted In: Cutting Ideas