Common problems and solutions for fiber laser cutting metal materials

Laser cutting uses laser energy to cut the material to obtain the desired workpiece.

For example, stainless steel, carbon steel, etc.

The irradiated material is rapidly melted, vaporized, ablated or reaches a burning point.

And the molten material is blown off by a high-speed airflow coaxial with the beam, thereby cutting the workpiece.

If  we strictly control the laser cutting process parameters during the cutting process, we can maintain the cutting quality.

The most important process parameters affecting the quality of material cutting are cutting speed, laser power, focus position, auxiliary gas pressure, nozzle height, and nozzle diameter.

The specific problems and debugging methods for cutting stainless steel and carbon steel are as follows.

1.Fiber laser cutting for carbon steel 

Fiber laser-cut stainless steel is a tiny regular burr that produces droplets.

The reasons and solutions for the condition that there are some tiny regular burr when the fiber laser cutting.

At first,if the focus is too low, we should raise the focus.

Secondly,if the feed rate is too high, we should slow down the speed.

Thirdly,if the power is not big enough, we should increase the power.

The reasons and solutions for the condition that there is long irregular burrs only on one side of the cutting edge.

1.If the nozzle misalignment, we should make the nozzle centering

2.If the focus is too high, we should reduce the focus.

3.If the air pressure is too low, we should increase air pressure.

4.If the speed is too low, we should accelerate the cutting speed.

5.If the nozzle diameter is too small or the nozzle hole is not round, we should check the nozzle hole condition with a nozzle with a larger diameter.

The reasons and solutions for the condition that there is long irregular burrs on both sides, discoloration of the surface of the cut sheet.

1.If the feed rate is too slow, we should raise the speed.

2.If the focus is too high, we should reduce the focus.

3.If the air pressure is too low, we should increase air pressure.

4.If the nozzle is too small, we should change a bigger one.