If the thermal conductivity is high in a material such as aluminum, much of the energy is transferred laterally into the material, which results in inefficient cutting and reduced cutting speeds. Other conditions contribute to processing problems. The assist gas serves two purposes: to help in combustion, and to blow the debris or molten metal away from the kerf. In many instances, the laser's ability to cut can be further improved by focussing the assist gas. Ideally, the wavelength will allow 100 percent absorbability with the material. For example, a laser's cutting ability increases significantly when the spot size is narrowed from even. As thickness increases, the likelihood of a blowout or thermal runaway also increases.īy highly focusing its beam and reducing its spot size, the laser becomes a sharper cutting tool. Laser cutting thickness limitations are determined by heat conductivity, surface reflection at 10.6 microns, the vaporization point of alloys, the types of alloys, surface tension of molten materials, and part geometry. For instance, lasers may be ineffective for cutting carbon steel thicker than. Laser cutting becomes less effective when material thickness increases. In addition, materials may be heat treated after cutting without the distortion that can occur with the grinding and reforming usually needed after processing by other methods. This small kerf allows close nesting of parts and helps to minimize material waste. 010 inch enables lasers to be used for small-radius cutting. One advantage that lasers have over conventional processes such as stamping and punching is that they work with minimal contact. While lasers are not the answer for every application, they can provide flexibility, efficient material use, and a repeatable, controlled process.
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