please send me seminar report pdf and seminar ppt file of the laser beam maching
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seminar report on laser beam machining pdf
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please send me seminar report pdf and seminar ppt file of the laser beam maching
31-03-2017, 10:12 AM
Laser beam machining (LBM) is a non-traditional subtractive manufacturing process, a form of machining, in which a laser is directed towards the workpiece for machining. This process uses thermal energy to remove material from metallic or non-metallic surfaces. The laser focuses on the surface to be worked and the thermal energy of the laser is transferred to the surface, heating and melting or vapourizing the material. Laser beam machining is best suited for brittle materials with low conductivity but can be used in most materials. There are many different types of lasers including gas, solid state laser, and excimer. In gas lasers, an electric current is released from a gas to generate a coherent light. Some of the most commonly used gases consist of; He-Ne, Ar and CO2. Fundamentally, these gases act as a means of pumping to ensure that the necessary population investment is achieved.
Solid-state lasers are designed by doping a rare element on various host materials. Unlike gas lasers, solid state lasers are pumped optically by flash lamps or arc lamps. Ruby is one of the materials commonly used in this type of laser. A Laser Ruby is a type of solid state laser whose average laser is a synthetic ruby crystal. These ruby lasers generate deep red light pulses of a millisecond pulse length and a wavelength of approximately 694.3 nm. The synthetic ruby bar is pumped optically using a xenon flash tube before it is used as an active laser medium.
YAG is an abbreviation for yttrium aluminum garnet crystals that are used for solid state lasers, while Nd: YAG refers to neodymium-doped yttrium aluminum garnet crystals that are used in state lasers Solid as a laser medium. Nd: YAG lasers emit a wavelength of high energy light waves. Nd: glass is a neodymium doped gain medium made of silicate or phosphate materials that are used in fiber laser. In excimer lasers, the state is different than in solid state or gas lasers. The device uses a combination of reactive and inert gases to produce a beam. This machine is sometimes known as an ultraviolet chemical laser.
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