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What is a metal laser cutting machine?
Metal laser cutting machine is a kind of optical mechatronics equipment that uses laser to cut metal materials. It has been widely used in aviation, aerospace, electronics, electrical appliances, subway accessories, automobiles, machinery, precision Parts, ships, metallurgical equipment, elevators, household appliances, craft gifts, tool processing, decoration, advertising and other metal sheet manufacturing and processing industries.
Currently, most laser cutting machines can be divided into CO2 laser cutting machines, fiber laser cutting machines, and YAG laser cutting machines. Among them, the fiber laser cutting machine has emerged in recent years, because its technical requirements are relatively low, and it has gradually become the mainstream metal laser cutting machine. Our apple tree workshop uses fiber laser cutting machine.
Principle of metal laser cutting
Metal laser cutting uses a laser tube to emit light, and then uses a mirror and a focusing mirror to reflect and focus the light on the laser head. The focused strong light is emitted to the material that needs to be cut or engraved, so that it melts quickly due to high temperature to achieve the purpose of cutting and engraving. During the cutting process, an auxiliary gas suitable for the material to be cut is added. When cutting steel, oxygen must be used as the auxiliary gas to produce an exothermic chemical reaction with the molten metal to oxidize the material, and at the same time help blow away the slag in the slit. The auxiliary gas entering the nozzle can also cool the focusing lens, preventing smoke and dust from entering the lens holder to contaminate the lens and cause the lens to overheat.
The advantages of metal laser cutting
Compared with other thermal cutting methods, laser cutting is characterized by fast cutting speed and high quality. Specifically summarized as the following aspects.
⑴ Good cutting quality
Because of the small laser spot, high energy density and fast cutting speed, laser cutting can obtain better cutting quality.
① The laser cutting incision is narrow, the two sides of the incision are parallel and perpendicular to the surface, and the dimensional accuracy of the cut parts can reach ±0.05mm.
② The cutting surface is smooth and beautiful, and the surface roughness is only tens of microns. Even laser cutting can be used as the last process without mechanical processing, and the parts can be used directly.
③ After the material is laser cut, the width of the heat-affected zone is small, and the performance of the material near the slit is almost unaffected, and the workpiece has small deformation, high cutting accuracy, good geometry of the slit, and the slit The cross-sectional shape presents a relatively regular rectangle.
⑶ Fast cutting speed
The material does not need to be clamped and fixed during laser cutting, which not only saves tooling fixtures, but also saves auxiliary time for loading and unloading.
⑷ Non-contact cutting
There is no contact between the torch and the workpiece during laser cutting, and there is no tool wear. To process parts of different shapes, there is no need to change the 'toolThe laser cutting process has low noise, low vibration and no pollution.
Modern metal laser cutting technology has been quite mature and has gradually become the 'sword' of 'cutting iron like mud' that people dream of.
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