Precision Analysis Of Metal Laser Cutting Machine.

The accuracy of laser cutting is composed of many factors:

1. The size of the spot after the laser beam passes through the focus: the smaller the spot after the laser beam is concentrated, the higher the cutting accuracy, especially the smaller the slit, the smallest spot can reach 0.01mm.

2. The positioning accuracy of the worktable determines the repeatability of the cutting: the higher the worktable accuracy, the higher the cutting accuracy.

3. The greater the thickness of the workpiece, the lower the accuracy, and the greater the slit: Since the laser beam is tapered, the slit is also tapered. Stainless steel with a thickness of 0.3MM is much smaller than the slit of 2MM.

4. The material of the workpiece has a certain influence on the laser cutting accuracy: under the same circumstances, the cutting accuracy of stainless steel is higher than that of aluminum, and the cut surface is smoother. The cutting quality of the laser cutting machine is good. The incision width is narrow (generally 0.1-0.5mm), high precision (generally the hole center distance error is 0.1-0.4mm, the contour size error is 0.1-0.5mm), the surface roughness of the cut is good (generally Ra is 12.5-25μm) ), the cut seam can be welded without further processing.

Laser cutting machine cutting accuracy.

The cutting accuracy of a laser cutting machine is an important part of measuring the quality of a laser cutting machine, but the laser cutting accuracy does not entirely depend on the equipment itself, but is composed of many factors, mainly as follows:

1. The size of the focused spot of the laser beam.

The smaller the spot after the laser beam is concentrated, the higher the cutting accuracy, especially the smaller the slit, and the smallest spot can reach 0.01mm. The focused spot of the fiber laser is very small, which is suitable for high-precision cutting and processing.

2. The positioning accuracy of the worktable determines the repeatability of the cutting.

The higher the table accuracy, the higher the cutting accuracy. The high-energy laser cutting machine machine tool is manufactured by a large military industry enterprise. It adopts a movable gantry structure, and the beam and bed are processed as a whole. After a long-term aging treatment, the stress of the machine tool is eliminated.

3. The greater the thickness of the workpiece, the lower the accuracy and the greater the slit.

Since the laser beam is tapered, the slit is also tapered. The thickness of 0.3mm stainless steel is much smaller than the slit of 2mm.

4. The material of the workpiece has a certain influence on the accuracy of laser cutting.

In the same situation, stainless steel has a higher cutting accuracy than aluminum, and the cut surface is smoother.

5. The cleanliness of the compressed air has a direct impact on the quality and efficiency of laser cutting. Therefore, the air post-treatment device cannot be sloppy. Customers with heavy workload should strengthen on the basis of the traditional configuration. It is best to add a high-efficiency degreaser or adsorption dryer to deeply remove the oil, water and dust in the compressed air. To ensure that the cleanliness of the compressed air can meet the process requirements of laser cutting, reduce the frequency of replacement of protective lenses, improve the quality of laser cutting, and greatly reduce production costs.

Advantages: Choose a high-pressure air compressor as auxiliary gas than conventional oxygen; nitrogen can save energy by 35-40%.

Disadvantages: The stainless steel incision will change in depth due to the difference in thickness, and the incision with a thickness of 10mm or more is not very clean.

Generally, the cutting efficiency is the highest under 4mm, and the saving is the most obvious.

Conclusion: The laser cutting machine adopts compressed air as auxiliary gas and has a wide range of applications. It can replace oxygen to cut carbon steel sheets, and can replace nitrogen to cut stainless steel, galvanized sheets, aluminum alloys, and copper alloys. The correct selection and use of air compressors can not only guarantee the quality of laser cutting, but also obtain good cutting efficiency and very obvious processing cost savings.