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laser cutting: the fundamentals -

by:QUESTT     2020-06-13

When we think of a laser, we may think of what we see in a movie.However, the laser can be found in realityThe world industry, in industry, makes it easier to cut and transform objects.In laser material processing, the laser will hit the target and make changes to the object, such as by absorbing photons, which are particles of light emitted from the laser.These particles turn into thermal energy.A laser is a device that controls high-excitation atoms to emit photons to generate optical flow.When the laser is connected to the material, only three things can happen.The laser optical flow is either reflected, sent, or absorbed by an object.Sometimes this can happen two or three times at the same time, such as transmission and absorption.The beam will be a certain wavelength and a certain color, and will be closely concentrated, unlike the beam that is common in daily life.If most of the beam is absorbed into an object, this is the most common case in laser material processing, the main features that must be taken into account are the average intensity of the laser, the intensity and wavelength on the object to which it is irradiated.The intensity at the basic level is the brightness of the laser beam.The wavelength is the sequence of waves produced by photons.Think about moving water waves, where photons fluctuate in the same type of waves.Measure the average power of the laser beam in watts (W.All lasers have active media that absorb energy.The medium can be composed of solid crystals-Keep the atomic absorption energy like material, fluid, gas (such as CO2 laser), or diode.The laser must also have a way to get the atom excited.This may be a light source, for example.The optical cavity is a set of mirrors in the laser system.One of the capabilities of the laser is to inject energy into the atoms, leaving them in a state of excitement.This is done by pumping inside the laser called the laser medium.At every extreme of the laser medium is a mirror.Photons are reflected out of two mirrors and motivate other electrons to emit more photons.The mirror at one end allows some light to pass through, which is the laser beam.Getting atoms excited requires matching electrons at high energy.Charged electrons that were initially soaked in energy are now able to emit energy as light or photon streams.The laser is rated according to the characteristic of average power, wavelength and intensity.That means they\'re either solid.State, fluid, gas, or semiconductor laser.Solid-The state is a laser with an optical transparent material and a solid bonding medium.A fluid or dye laser has a liquid environment where they can work at a pulse or continuous wavelength.Gas of gas.Examples of gas lasers are CO2 lasers and neon lights seen in store displays.The fourth group is a semiconductor or diode laser, which is the most common type of laser.Taking a CO2 laser as an example, the carbon dioxide atom in the form of a gas is excited at a low pressure between the two mirrors.One of the mirrors can escape a little light.They produce a lot of heat.The light output is at the end of the infrared spectrum.It is important to have high quality beams, especially in cutting.A laser cut by a laser beam.The beam begins by melting what is ahead of it, or often by evaporation.A cut occurs when the beam passes through the object.Various types of lasers designed for cutting various materials.CO2 lasers have high absorption capacity and are commonly used for cutting other metals such as plastic, wood, stainless steel, carbon steel, aluminum and titanium.Besides carbon dioxide, there are other materials for CO2 lasers.They have a mixture of gases such as helium (He) and nitrogen (N2.In addition to aluminum, nitrogen is cut into inches of stainless steel.Oxygen cuts carbon steel.The advantages of laser cutting include no wear and tear machinery, faster than using other cutting methods, and can cut thicker materials.The use of lasers ranges from communication to medicine.They have completely changed the technology of surgery and cutting in the industrial field.It\'s interesting to see what\'s going to happen with laser cutting capabilities in the future.
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