High power laser cutting machines, with irreplaceable advantages such as large cutting width, fast cutting speed, and the ability to cut thicker plates, have gained widespread market recognition once they were launched. However, due to the fact that high-power laser cutting technology is still in the initial stage of popularization, although staff from the laser cutting machine manufacturer have conducted systematic training for enterprise operators when delivering equipment and training, some operators are still not proficient in the skills of high-power laser cutting.
Therefore, based on the summary of technical engineers and customer common problems, the editor summarizes the following solutions to the difficult problems in high-power laser cutting technology.
How to Improve Three Difficulties in Laser Cutting
When poor cutting effects are found, the following situations should be checked first:
1. All lenses in the laser head are clean and free of contamination;
2. The water temperature of the water tank is normal, and the laser has no condensation;
3. The cutting gas has excellent purity, smooth gas path, and no gas leakage.
Problem 1: Cutting Stripes
Factors that cause the problem:
1. Incorrect nozzle selection, nozzle too large;
2. The air pressure is not set correctly, and the set air pressure is too high, resulting in excessive burning and streaking;
3. Incorrect cutting speed, too slow or too fast cutting speed can also cause sufficient burnout.
terms of settlement:
1. Replace the nozzle, replace the nozzle with a small diameter, such as 16mm carbon steel bright surface cutting, and select high-speed nozzle D1.4; 20mm carbon steel bright surface can choose high-speed nozzle D1.6;
2. Reduce cutting air pressure and improve end cutting quality;
3. Adjust the cutting speed so that the power matches the cutting speed appropriately,
Problem 2: There are nodules at the bottom
Factors that cause the problem:
1. The nozzle selection is too small, and the cutting focus does not match;
2. The air pressure is too low or too large, and the cutting speed is too fast;
3. The material of the plate is poor, the quality of the plate is poor, and it is difficult for the small nozzle to remove the slag.
terms of settlement:
1. Replace the large diameter nozzle and adjust the focus to the appropriate position;
2. Increase or decrease the air pressure until the air flow rate is appropriate;
3. Select a good plate.
Problem 3: There are burrs at the bottom
Factors that cause the problem:
1. The nozzle diameter is too small to meet the processing requirements;
2. Negative defocus mismatch, negative defocus should be increased and modulated to an appropriate position;
3. The air pressure is too low, resulting in burrs at the bottom and insufficient cutting.
terms of settlement:
1. Selecting a large diameter nozzle can increase air flow;
2. Increase negative defocus to make the cutting section reach the bottom position;
3. Increasing air pressure can reduce bottom burrs.