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Precautions for laser cutting machines in different materials in the machinery industry

by:VENTECH     2022-02-11

Guide: With the rapid development of laser cutting technology, laser cutting machines play a unique role in all walks of life due to their unique advantages. Laser cutting machines have different characteristics in the cutting of various materials in the machinery industry, and there are different precautions for different materials when using laser cutting machines. At present, there are mainly the following types of metal materials that need to be processed by laser cutting machines:

1. Carbon steel plate

Falile laser cutting machine cutting samples

Good results will be obtained when this material is cut with oxygen. When oxygen is used as the processing gas, the cutting edge will be slightly oxidized. Modern laser cutting machines can cut carbon steel plates with a maximum thickness of up to 20mm. The cutting seam of carbon steel can be controlled within a satisfactory width by using the oxidation melting cutting mechanism, and the cutting seam for thin plates can be as narrow as about 0.1mm.

2. Stainless steel

Falile laser cutting machine cutting samples

Laser cutting is an effective processing tool for the manufacturing industry that uses stainless steel sheet as the main component. Cutting stainless steel requires: Use high-pressure nitrogen to get an oxidation-free and burr-free edge, and no further treatment is required. Coating the oil film on the surface of the board will get a better perforation effect without reducing the processing quality.

3. Aluminum

Falile laser cutting machine cutting samples

Aluminum cutting is a melting laser cutting mechanism, the auxiliary gas used is mainly used to blow away the molten product from the cutting area, and usually a better cut surface quality can be obtained. For some aluminum alloys, attention should be paid to prevent the occurrence of micro-cracks between the surface of the slit. Pure aluminum is very difficult to cut because of its high purity. Aluminum can only be cut when the 'reflective absorption' device is installed on the fiber laser cutting machine system. Otherwise, the reflection will destroy the optical components.

4. Titanium and alloys

Falile laser cutting machine cutting samples

Pure titanium can very well couple the heat energy converted by the focused laser beam. When the auxiliary gas is oxygen, the chemical reaction is fierce and the cutting speed is faster, but it is easy to form an oxide layer on the cutting edge, and it will cause overburn if you are not careful. For the sake of safety, it is better to use air as the auxiliary gas to ensure the cutting quality.

5. Copper and brass

Falile laser cutting machine cutting samples

Both materials have high reflectivity and very good thermal conductivity. Pure copper (red copper) basically cannot be cut with CO2 laser beam due to its high reflectivity. Brass (copper alloy) uses a higher laser power, and the auxiliary gas uses air or oxygen, which can cut thinner plates. Brass with a thickness of 1mm or less can be cut with nitrogen; copper with a thickness of 2mm or less can be cut, and the processing gas must be oxygen.

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