How Does Fiber Laser Cutting Machine Work?

- Nov 17, 2020-

how does fiber laser cutting machine work?


Laser cutting machine is to focus the laser emitted from the laser into high power density laser beam through the optical system. The laser beam irradiates the surface of the workpiece to make the workpiece reach the melting point or boiling point. At the same time, the high pressure gas coaxial with the beam will blow away the melted or gasified metal. With the relative position of the beam and the workpiece moving, the material will eventually form a cutting seam, thus achieving the purpose of cutting.


Laser cutting is to replace the traditional mechanical knife with invisible beam. It has the characteristics of high precision, fast cutting, not limited to cutting pattern limitation, automatic typesetting, saving materials, smooth incision and low processing cost. It will gradually improve or replace the traditional metal cutting process equipment. The mechanical part of laser cutter head has no contact with the workpiece, which will not cause Scratch on the workpiece surface in the 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 cutting seam is narrow (0.1 mm ~ 0.3 mm); the incision has no mechanical stress and shear burr; the machining precision is high, the repeatability is good, and the material surface is not damaged; NC programming, can process any plane drawing, can cut the whole board with large format, without opening the mold, economical and time-saving.


Characteristics of laser cutting


a. The cutting quality is good. Due to the small laser spot and high energy density, a good cutting quality can be obtained by one laser cutting. The slit of laser cutting is generally 0.1-0.2mm, the width of heat affected zone is very small, the geometry of slit is good, and the cross-section of slit is regular rectangle. There is no burr on the cutting surface of laser cutting, and the surface roughness R can reach more than 12.5um. Even as the last processing procedure, the cutting surface can be directly welded without further processing, and the parts can be used directly.


b. The cutting speed is fast. The speed of laser cutting is faster. For example, with 2KV laser power, the cutting speed of 8mm thick carbon steel is 1.6m/min, and that of 2mm thick stainless steel is 3.5m/min. In laser cutting, the heat affected zone of the workpiece is small, the deformation is very small, and there is no need to clamp and fix, which can not only save the clamping fixture, but also save the auxiliary time of clamping.


c. There are many kinds of cutting materials. Compared with oxygen ethane cutting and plasma cutting, there are many kinds of materials that can be cut by laser cutting, including metal, non-metal, metal matrix and non-metal matrix composites. For different materials, due to their own thermal physical properties and laser absorption rate is different, it shows different laser cutting adaptability.


d. Suitable for the processing of large products. The mold manufacturing cost of large products is very high, laser processing does not need any mold, and laser processing can completely avoid the collapse edge formed by punching and shearing, which can greatly reduce the production cost of enterprises and improve the product grade.


e. Clean, safe and pollution-free. In the process of laser cutting, the noise is low, the vibration is small, and there is no pollution.


f. It is not susceptible to electromagnetic interference. Unlike electron beam machining, laser processing is insensitive to electromagnetic interference and does not need vacuum environment.


The above is the working principle of fiber laser cutting machine and the characteristics of laser cutting. After reading the above contents, do you think the laser technology is very magical. For more knowledge about laser cutting machine, you can consult us at any time.


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