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The factors that affect the cutting accuracy of tube laser cutting machines

There are many factors that affect the cutting accuracy of machine de découpe de tubes au laser. Specifically, there are the following main reasons:

1.The shape of the laser beam

The beam from the laser is tapered, so the slit cut out is also tapered, in this case, the cutting thickness of 0.6MM stainless steel will be smaller than the 3MM slit. Therefore, the shape of the laser light speed will be a major factor affecting the cutting accuracy of the metal pipe laser pipe cutting machine. In this cone-shaped laser speed of light conditions, the greater the thickness of the workpiece, the lower the accuracy will be.

2.The spot size of the laser beam

Spot size is also one of the factors affecting the cutting accuracy of the pipe laser cutting machine. When the cone-shaped laser focus together, the spot will become smaller and smaller, the higher the laser cutting accuracy. The smallest spot can be up to 0.01mm, can cut out the tiny cutting gap, to ensure the processing accuracy.

3.The different materials of the pipe

Different materials pipe laser cutting machine cutting accuracy is also less different, even the same material, if the composition of the material is different, the cutting accuracy will also be different. Therefore, the workpiece material on the pipe laser cutting accuracy also has a certain impact. For example, under the same circumstances, stainless steel has higher cutting accuracy and smoother cutting surface than aluminum.

Generally speaking, different pipes to be cut have different physical and chemical properties.

In terms of physical properties, the pipes to be cut vary in terms of hardness, melting and boiling points, and whether they are easy to melt. In terms of chemical properties, such as the flammability, stability, oxidation, and combustion-supporting properties of the pipes to be cut, there are also great differences. This makes the different pipes to be cut different in terms of the size of the chuck, the type and pressure of the auxiliary gas. And the requirements such as laser cutting power are different.

Under normal circumstances, the greater the thickness of the pipe to be cut, the higher the laser cutting power required. When cutting pipes of special materials such as aluminum pipes, copper pipes, stainless steel pipes, and even pipes made of materials with excellent oxidation resistance, as well as pipes of special shapes such as special-shaped pipes, H-shaped steel, channel steel, and angle steel, the laser The cutting power, the choice of auxiliary gas type, and the performance of the chuck itself also have different requirements. When cutting and processing lengthened and weighted pipe fittings, in addition to considering laser power and auxiliary gas, the selection of supporting components must also be considered to ensure the accuracy of the entire cutting process.

4.Workpiece thickness

The greater the thickness of the workpiece, the lower the accuracy and the larger the slit. Since the laser beam is conical, the cutting slit is also conical. For example, the cutting gap of a material with a thickness of 0.3mm is much smaller than a material with a thickness of 2mm.

5.Choice of cutting system

For hardware to fully play its role, suitable software assistance is needed, such as an excellent pipe cutting system.
The more popular pipe cutting systems on the market now include cutting systems independently developed by FS, Siemens, Beckhoff or companies. Different systems support different cutting methods, pipe shapes, and number of chucks. For example, FSCUT’s system supports offset tube center error in production to improve through holes cutting precision. Excellent tube cutting software is one of the necessary factors to achieve high precision.

6.Selection of auxiliary gas

When the laser cutting machine is working, the light spot formed by focusing the laser beam through the lens is irradiated on the surface of the material to be cut, causing the temperature to rise in a very short time, thereby reaching the melting point or boiling point of the material to be cut. During the cutting process, the surface of the material to be cut can reflect the laser to a certain extent. During cutting, auxiliary gas can be blown to increase the absorption of the laser by the surface of the material to be cut and improve cutting efficiency. Auxiliary gases generally use oxygen, nitrogen, compressed air and other inert gases.


Oxygen is commonly used as an auxiliary gas because oxygen promotes the oxidation reaction on the surface of the pipe being cut, thereby improving cutting efficiency. When the laser cutting power and cutting speed are constant, the greater the oxygen pressure, the larger the cutting seam, and the cutting section stripes will be thicker and larger; when the oxygen pressure is reduced, the cutting seam becomes thinner, and the cutting section stripes are thin and smooth, but when When the pressure drops to a certain value, the cutting effect on one side of the pipe will be significant, but at the same time, slag will appear. The slag falling to the opposite side will affect the entire cutting accuracy, and sometimes it will even be difficult to cut off the cut pipe.


When cutting high-thickness pipes, special-shaped pipes or pipes of special materials, nitrogen and other inert gases need to be used as auxiliary gases. Combined with the metal and physical properties of the pipe being cut, compressed air can be selected as the auxiliary gas in order to control costs without affecting the overall cutting efficiency.

7.Summary

In general, the factors affecting pipe cutting accuracy are complex. Therefore, buyers should choose laser pipe cutting machine manufacturers with reliable quality and mature experience, and actively express their needs and provide detailed information during the procurement process. Only by selecting good hardware equipment can the stability of cutting accuracy be ensured.

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