It is believed that some customers who buy optical fiber laser cutting machines may not be very clear about the principle of laser cutting machines. Now let Xiao Bian explain the basic principle of optical fiber laser cutting machines to you.

1、 Principle of laser cutting

The laser beam is focused into a very small light spot, which makes the light spot reach a very high power density. The material under the light spot is quickly heated to the gasification temperature, and then evaporates to form a hole. The material moves relative to the speed of light, making the hole continuous and forming a slit with very narrow width.

2、 Characteristics of laser cutting

1: Good cutting quality. Because the laser spot is small and the energy density is high, a laser cutting can obtain better cutting quality. The kerf of laser cutting is generally 0.1-0.2mm, the width of the heat affected zone is very small, the geometric shape of the kerf is good, and the cross section of the kerf presents a relatively regular rectangle. The cutting surface of laser cutting is free of burrs, and the surface roughness R can generally reach above 12.5um. Laser cutting is even the last processing procedure. The cutting surface can be directly welded without further processing, and parts can be directly used.

2: Fast cutting speed. Laser cutting is fast. For example, using 2000W laser power, the cutting speed of 8mm thick carbon steel is 1.6m/min, and that of 2mm thick stainless steel is 5.5m/min Because the heat affected zone of the workpiece is small and the deformation is very small during laser cutting, there is no need for clamping and fixing, which can save the clamping fixture and auxiliary time such as clamping.

3: There are many kinds of materials that can be cut. Compared with oxygen ethane cutting and plasma cutting, laser cutting has many kinds of materials, including metal, non-metal, metal matrix and non-metal matrix composites. For different materials, due to their different laser absorption, they will show different laser cutting adaptability.

4: Suitable for processing large products. The mold manufacturing cost of large products is very high. Laser processing does not require any mold. Moreover, laser processing completely avoids the collapse edge formed during material punching and shearing, which can greatly reduce the production cost of enterprises and improve the product grade.

5: Clean, safe and pollution-free. In the process of laser cutting, the noise is low, the vibration is small, and there is no pollution, which greatly improves the working environment of operators.

6: Not susceptible to electromagnetic interference. Different from electron beam processing, laser processing is not sensitive to electromagnetic interference and does not require a vacuum environment.

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