Difficulties and Solutions of High Power Laser Cutting Technology

If the cutting effect is found to be poor, the following reasons should be checked first:

1. All lenses in the laser head are clean and free of contamination;

2. The water temperature in the water tank is normal, and the laser has no condensation;

3. The cutting gas has excellent purity, smooth gas path and no air leakage.

Problem 1: Cutting with stripes

Possible causes:

1. Wrong nozzle type selection and too large nozzle;

2. The air pressure is not set correctly, and excessive air pressure will cause excessive burning and streaking;

3. If the cutting speed is not correct, too slow or too fast cutting speed will also cause full overburn.

terms of settlement:

1. Replace the nozzle, replace the nozzle with a small diameter, such as 16mm carbon steel bright cutting, and choose the high-speed nozzle D1.4mm; High speed nozzle D1.6mm can be selected for 20mm carbon steel bright surface;

2. Reduce cutting air pressure and improve end face cutting quality;

3. Adjust the cutting speed, and the power and cutting speed can be matched appropriately to achieve the effect shown in the right figure below.

Problem 2: There is slag at the bottom

Possible causes:

1. The nozzle is too small, and the cutting focus does not match;

2. The air pressure is too small or too large, and the cutting speed is too fast;

3. The plate material is poor, the plate quality is poor, and it is difficult to remove the slag with small nozzles.

terms of settlement:

1. Replace the large diameter nozzle and adjust the focusing point to the proper position;

2. Increase or decrease the air pressure until the air flow is appropriate;

3. Select good plates.

Problem 3: Burrs on the bottom

Possible causes:

1. The nozzle diameter is too small to meet the processing requirements;

2. Negative defocusing does not match. Increase the negative defocusing and adjust the proper position

3. The air pressure is too small, resulting in burr at the bottom and insufficient cutting.

terms of settlement:

1. Large diameter nozzle can increase air flow;

2. Increase negative defocusing to make the cutting section reach the bottom position;

3. Increasing the air pressure can reduce the burr at the bottom.