Laser cutting uses laser energy to cut materials to obtain the required workpiece. For example, stainless steel, carbon steel, etc., the irradiated materials quickly melt, vaporize, ablate or reach the burning point, and the molten materials are blown away by the high-speed airflow coaxial with the beam, thus cutting the workpiece.
If the laser cutting process parameters are strictly controlled during the cutting process, the cutting quality can be maintained. The most important process parameters affecting material cutting quality are cutting speed, laser power, focusing position, auxiliary gas pressure, nozzle height and nozzle diameter. The specific problems and commissioning methods for cutting stainless steel and carbon steel are as follows.
Carbon steel fiber laser cutting
The stainless steel cut by fiber laser is a small regular burr, which will produce droplets.
The reason and solution of regular tiny burr in fiber laser cutting.
Common problems of laser cutting machine cutting metal materials
1. If the focus is too low, we should improve the focus.
2. If the feed speed is too high, we should slow down.
3. If the power is not large enough, the power should be increased.
Reasons for and solutions to irregular long burrs only on one side of the cutting edge.
Common problems of laser cutting machine cutting metal materials
1. If the nozzle is not aligned, center the nozzle
2. If the focus is too high, reduce the focus.
3. If the air pressure is too low, increase the air pressure.
4. If the speed is too low, speed up the cutting speed.
5. If the nozzle diameter is too small or the nozzle hole is not round, the nozzle with larger diameter shall be used to check the nozzle hole condition.
The reason and solution of long irregular burr on both sides and discoloration on the surface of cutting paper.
Common problems of laser cutting machine cutting metal materials
1. If the feed speed is too slow, we should increase the speed.
2. If the focus is too high, reduce the focus.
3. If the air pressure is too low, increase the air pressure.
4. If the nozzle is too small, we should replace it with a larger one.
Reasons and solutions for cutting materials from above the machine.
Common problems of laser cutting machine cutting metal materials
1. If the focus is too slow, we should improve the focus.
2. If the power is too small, the power should be increased.
3. If the feed speed is too high, reduce the speed.
Note: In case of the above conditions, please press "Pause" immediately to prevent the slag from splashing on the focusing lens.
The reason why the cutting edge is yellow and the solution.
1. If the nitrogen concentration is not pure, check the purity of nitrogen
2. If there is oxygen or air in the air pipe, check whether the oxygen solenoid valve or air solenoid valve is tightened.
Note: The laser cutting principle of aluminum alloy and brass is the same as that of stainless steel, and the problems caused by cutting are similar. The difference is that due to the high reciprocity of aluminum alloy and brass, other parameters are similar to stainless steel, as long as the cutting speed is properly reduced and the linear speed is introduced. When cutting brass of more than 3mm, it is recommended to use oxygen as an auxiliary gas.
Carbon steel fiber laser cutting
The reason and solution for the situation that the bottom deviation of the stay wire is large and the bottom of the notch is wide.
Common problems of laser cutting machine cutting metal materials
1. If the feed speed is too high, we should slow down.
2. If the power is too small, the power should be increased.
3. If the air pressure is too low, increase the air pressure.
4. If the focus is too high, we should reduce the focus.
The burr on the bottom surface is similar to the slag, which is dripping and easy to remove.
1. If the feed speed is too high, we should slow down.
2. If the air pressure is too low, increase the air pressure.
3. If the focus is too high, we should reduce the focus.
The reasons and solutions for the difficulty in removing the metal burrs on the bottom surface.
Common problems of laser cutting machine cutting metal materials
1. If the feed speed is too high, we should slow down.
2. If the air pressure is too low, increase the air pressure.
3. If the focus is too high, we should reduce the focus.
Reasons and solutions for cutting burrs only on one side of the sheet.
Common problems of laser cutting machine cutting metal materials
1. If the nozzle is not aligned correctly, center the nozzle.
2. If the incoming line speed is too fast or the incoming mode is wrong, we should reduce the incoming line speed or change the import mode.
Reasons and solutions for inaccurate cutting surface.
Common problems of laser cutting machine cutting metal materials
1. If the air pressure is too high, reduce the air pressure.
2. If the focus is too high, reduce the focus.
3. If the diameter of the nozzle is too large, we should install a suitable nozzle.
The reason and solution for the very rough cutting surface.
Common problems of laser cutting machine cutting metal materials
1. If the focus is too high, reduce the focus.
2. If the air pressure is too high, reduce the air pressure.
3. If the feed speed is too slow, we should increase the speed.
Note: The cutting principle of structural steel is the same as that of carbon steel. Therefore, we can refer to carbon steel to debug their laser cutting process, and we can solve the problem defects by referring to the above carbon steel methods.