What is a laser cutting machine?
laser cutting machineThe laser light emitted from the laser is focused into a laser beam of high power density through the optical path system. The laser beam irradiates the surface of the workpiece to make the workpiece reach the melting point or boiling point, while the high-pressure gas coaxial with the beam blows away the molten or vaporized metal.
As the relative position of the beam and the workpiece moves, the material eventually forms a slit, so as to achieve the purpose of cutting.
Laser cutting processing uses invisible beams to replace traditional mechanical knives. It has the characteristics of high precision, fast cutting speed, unrestricted cutting patterns, automatic typesetting, material saving, smooth cuts, and low processing costs. It will gradually improve or replace the traditional metal cutting equipment. The mechanical part of the laser cutter head has no contact with the workpiece, and the surface of the workpiece will not be scratched during work; the laser cutting speed is fast, the incision is smooth and flat, and generally no subsequent processing is required; the cutting heat affected zone is small, the plate deformation is small, and the slit is narrow (0.1mm ~ 0.3mm); There is no mechanical stress and no shearing burr at the cut. High machining accuracy, good repeatability, no damage to material surface; CNC programming, it can cut the whole plate with large width without mold opening, which is economical and time-saving.
Laser is a kind of light. Like other natural light, it is produced by the transition of atoms (molecules or ions, etc.).). But unlike ordinary light, the laser only relies on spontaneous radiation in the initial short period of time, and the subsequent process is completely determined by laser radiation. Therefore, the laser has a very pure color, almost no divergence directivity, high luminous intensity and high coherence.
Laser cutting is achieved by using the high power density energy generated by laser focusing. Under the control of the computer, the laser is pulsed and discharged to output a high-frequency pulsed laser with a controlled repetition rate to form a beam with a certain frequency and a certain pulse width. The pulsed laser beam is guided and reflected by the optical path, and focused on the surface of the processed object through the focusing lens group to form a fine and high energy density spot. The focus is located near the surface to be processed, and the processed material is melted or vaporized at an instantaneous high temperature. Each high-energy laser pulse instantly sputters a small hole in the surface of the object. Under the control of the computer, the laser processing head and the material to be processed are constantly moving relative to each other, and the objects are processed into the desired shape according to the pre-drawn graphics.
Cutting process parameters (cutting speed, laser power, gas pressure, etc.) And the motion trajectory is controlled by the numerical control system, and the slag at the cutting position is blown off by a certain pressure of auxiliary gas.
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