HOW DOES LASER ENGRAVING WORK?

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  • HOW DOES LASER ENGRAVING WORK?

    Precio : Gratis

    Publicado por : dnfsdd810

    Publicado en : 21-10-21

    Ubicación : A Coruña

    Visitas : 1



    HOW DOES LASER ENGRAVING WORK?

    What is laser engraving and how does it work?

    Laser engraving is a process that vaporizes materials into fumes to engrave permanent, deep

    marks. The laser beam acts as a chisel, incising marks by removing layers from the surface

    of the material. The laser hits localized areas with massive levels of energy to generate

    the high heat required for vaporization.
        To choose the right laser marking process, you should rely on three factors:       
                The markings resistance: the capacity to remain legible under harsh conditions 

     
                The laser marking speed: the marking time that prevents production bottlenecks
           
                The material being marked: its compatibility with the marking method
        Small

    Laser Engraving Machine
    is typically used to engrave metal workpieces that will be

    exposed to various types of wear or surface treatments. Metal engraving works with steel

    and aluminum (including anodized and die-casting aluminum).
        The most outstanding feature of this process is its ability to engrave 2D codes that

    keep high readability rates after post-process treatments. Those treatments can include

    shot blasting, e-coating and heat treatments, addressing the most complex traceability

    issues.
        But if engraving the most resistant identifiers is not needed, laser etching is

    generally preferred because it’s a high-speed method that does not rely as heavily on

    ablation.

        From Solid to Gas: How It Works
        Whereas laser etching melts the material surface to change its roughness,

    Laser Engraver sublimates the material

    surface to create deep crevices. This means that the surface instantly absorbs enough

    energy to change from solid to a gas without ever becoming a liquid.
        To achieve sublimation, the Portable Laser Engraving Machine system

    must generate enough energy to allow the material’s surface to reach its vaporization

    temperature within milliseconds. Considering the extreme temperatures required for

    sublimation, laser engravers are pretty powerful tools.
        Materials are vaporized into fumes when they reach this temperature. As a result, when

    you buy a laser system, it should always come equipped with a fume extraction system to

    protect the work environment and an air knife to protect the laser’s lens.
        Fiber lasers are the ideal engraving tools for this because they generate a wavelength

    that reacts well with metals.
        Find a Laser Engraving Machine
        If you are looking for a Laser

    Engraving Machine
    , this list will help you find the right laser:     
                To integrate custom solutions yourself or with an integrator, view our OEM

    marking systems, including multiple types of lasers for industrial applications. Our range

    of laser systems includes fiber lasers and CO2 lasers.
                For turnkey automated or semi-automated laser solutions, consult our integrated

    laser machines page,
                To find information specific to the metal you’ll be marking, scroll through

    the list of metals.
                If you need guidance, you can always ask an expert.
        Why lasers are used for cutting
        Lasers are used for many purposes. One way they are used is for cutting metal plates.

    On mild steel, stainless steel, and aluminum plate, the Laser Cutting Machine is highly accurate, yields excellent cut

    quality, has a very small kerf width and small heat affect zone, and makes it possible to

    cut very intricate shapes and small holes.
        Most people already know that the word “LASER” is actually an acronym for Light

    Amplification by Stimulated Emission of Radiation. But how does light cut through a steel

    plate?
        How it works
        The laser beam is a column of very high intensity light, of a single wavelength, or

    color. In the case of a typical CO2 laser, that wavelength is in the Infra-Red part of the

    light spectrum, so it is invisible to the human eye. The beam is only about 3/4 of an inch

    in diameter as it travels from the laser resonator, which creates the beam, through the

    machine’s beam path. It may be bounced in different directions by a number of mirrors, or

    “beam benders” before it is finally focused onto the plate. The focused laser beam goes

    through the bore of a nozzle right before it hits the plate. Also flowing through that

    nozzle bore is a compressed gas, such as Oxygen or Nitrogen.
        Focusing the laser beam can be done by a special lens, or by a curved mirror, and this

    takes place in the Wood Laser Cutting Machine head. The beam has to be precisely focused so

    that the shape of the focus spot and the density of the energy in that spot is perfectly

    round and consistent, and centered in the nozzle. By focusing the large beam down to a

    single pinpoint, the heat density at that spot is extreme. Think about using a magnifying

    glass to focus the sun’s rays onto a leaf, and how that can start a fire. Now think about

    focusing 6 KWatts of energy into a single spot, and you can imagine how hot that spot will

    get.


       

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