Which materials can be cut by fiber laser cutting machine

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XT Laser-laser cutting machine

What are the material processing methods and existing problems of fiber laser cutting machine? Nowadays, fiber laser cutting machine is widely used in various industries because of its advantages such as high processing speed and good cutting quality. The sheet metal processing industry has not only brought great economic benefits to our enterprises, but also brought convenience to the production and life of our residents.

Optical fiber laser cutting technology is developed with the development of sheet metal processing industry and plays an important role in promoting the progress of social production.

The common processing materials of fiber laser cutting machine include stainless steel, carbon steel, aluminum, copper, titanium, etc.

Then let’s look at the common processing methods of these materials.

When the carbon steel fiber laser cutting machine uses oxygen as the processing gas, the cutting edge will have slight oxidation. For plates with thickness up to 4mm, nitrogen can be used as the processing gas for high-pressure cutting. In this case, the cutting edge will not be oxidized. For plates with a thickness of more than 10 mm, the laser special plate of the steel plate laser cutting machine can be used. During the processing, the workpiece surface can be coated with oil to obtain better results.

Both copper and brass have high reflectivity and excellent thermal conductivity. Brass with thickness less than 1mm can be cut with nitrogen. Copper with thickness less than 2mm can be cut, and oxygen must be used for processing gas. Copper and brass can only be cut if the system is equipped with a “reflection absorber”. Otherwise, the reflection will damage the optical element.

Stainless steel, stainless steel is the most used in various industries. When cutting stainless steel, the fiber laser cutting machine uses nitrogen to obtain edges without oxidation and burr without affecting the edge oxidation. Applying oil film on the surface of the plate can obtain better perforation effect without reducing the processing quality.

Although aluminum has high reflectivity and thermal conductivity to fiber laser cutting machine, it can cut aluminum with thickness less than 6 mm according to alloy type and laser capability. When cutting with oxygen, the cutting surface is rough and hard. When nitrogen is used, the cutting surface is smooth. Pure aluminum is difficult to cut due to its high purity, so it can only be cut by installing a “reflection absorption” device on the fiber laser cutting machine system. Otherwise, the reflection will damage the optical element.

Titanium and titanium slices are cut with argon and nitrogen as processing gas. Other parameters can refer to nickel chromium steel.

We know that in the process of processing various materials, more or less problems will occur. So how to solve these problems and ensure the processing quality.

When laser processing and cutting stainless steel and aluminized zinc plate, if the workpiece has burr, it first depends on the burr when cutting stainless steel. Check whether the nozzle needs to be replaced and whether the guide rail movement is unstable. However, the reason of cutting speed is not excluded. The cutting speed is too fast, which sometimes leads to the situation that the plate cannot be cut. This situation is particularly prominent when processing aluminum-zinc coated plates.

Small holes will be deformed during cutting. This is because the machine tool does not use the explosive piercing method when processing small holes, but uses the pulse piercing method. This makes the laser energy too concentrated in a small area, scorching the non-processing area, forming hole deformation and affecting the processing quality. At this time, the pulse perforation method should be changed to the explosive perforation method in the processing procedure. For laser cutting machines with lower power, the opposite is true. When machining small holes, pulse piercing method shall be adopted to obtain better surface finish.

When cutting carbon steel, there will be abnormal sparks, which will affect the cutting surface finish and processing quality of parts. At this time, when other parameters are normal, the following situations should be considered: NOZZEL loss of the nozzle of the laser head. If there is any loss, it should be replaced in time (if there is no new nozzle, the pressure of the cutting operation gas should be increased). Check whether the thread at the connection between the nozzle and the laser head is loose. If it is loose, stop cutting immediately and reinstall the thread.

The material processing methods and existing problems of the fiber laser cutting machine are different. The materials that can be processed by the fiber laser cutting machine cover most of the metal, and the problems in the cutting process are also different. The specific analysis shall be based on the actual cutting situation, and the problems found shall be timely fed back to the manufacturer for technical guidance.

Otherwise, the reflection will destroy the optical components.

Stainless steel, stainless steel is the most used in various industries. When cutting stainless steel by optical fiber laser cutting machine, nitrogen is used to obtain the edge without oxidation and burr under the condition that the edge oxidation is not affected. Coating oil film on the surface of the plate will get better perforation effect, but will not reduce the processing quality.

Aluminum. Although aluminum has high reflectivity and thermal conductivity for fiber laser cutting machine, aluminum with thickness less than 6mm can be cut, depending on the alloy type and laser capability. When cutting with oxygen, the cutting surface is rough and hard. When using nitrogen, the cutting surface is smooth. Pure aluminum is very difficult to cut because of its high purity. It can only be cut when the “reflection absorption” device is installed on the fiber laser cutting machine system. Otherwise, the reflection will destroy the optical components.

Titanium and titanium plate are cut with argon and nitrogen as processing gas. Other parameters can refer to nickel chromium steel.

We know that some problems will occur more or less in the processing of various materials. So how to solve these problems and ensure the processing quality?

When cutting stainless steel and aluminum-coated zinc plate by laser processing, the workpiece has burr. First of all, we should look at the burr condition when cutting stainless steel. We can check whether the nozzle needs to be replaced and whether the guide rail movement is unstable. However, the reason of cutting speed can not be ruled out. Cutting speed sometimes leads to the condition that the plate can not be cut through, which is particularly prominent when processing aluminum-zinc coated plate.

Deformation occurs when cutting and processing small holes, which is because the machine tool does not use the method of explosive perforation when processing small holes, but uses the method of pulse perforation. This causes the laser energy to gather too much in a small area, scorching the non-processing area, forming hole deformation and affecting the processing quality. At this time, the pulse perforation mode should be changed to the explosive perforation mode in the processing program to solve the problem. On the contrary, for the laser cutting machine with small power, the method of pulse perforation should be adopted in the small hole processing to obtain better surface finish.

Abnormal spark occurs when cutting carbon steel, which will affect the smoothness and processing quality of the cut section of the part. At this time, under the condition that other parameters are normal, the following conditions should be considered: the loss of the laser head nozzle NOZZEL. If the loss occurs, the nozzle should be replaced in time (in the case of no new nozzle replacement, the cutting operation gas pressure should be increased); Check whether the thread at the connection between the nozzle and the laser head is loose. If it is loose, stop cutting immediately and screw on the thread again.

The material processing methods and problems of fiber laser cutting machine are different. The materials that can be processed by the fiber laser cutting machine cover most of the metal, and the problems encountered in the cutting process are also different. The specific analysis should be based on the actual cutting situation, and the problems should be fed back to the manufacturer in time for technical guidance.



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