Burr formation is a common occurrence during laser cutting machine processing and remains an unresolved issue in metal cutting theory. Burr affects the dimensional accuracy, shape and positional accuracy, as well as the surface roughness of the machined workpiece. Today, let’s discuss the common causes of burrs in laser cutting and the available solutions.
Causes and solutions of burrs in laser cutting.
Cause 1: Offset Position of Laser Beam Focus
- Problem: The laser beam focus generated by the laser cutting machine has a deviation between its upper and lower positions, resulting in the energy not being concentrated precisely on the workpiece and causing incomplete vaporization. This leads to an increased amount of molten slag and burr formation.
- Solution: Adjust the position of the laser beam focus to its optimal state based on the offset position.
Cause 2: Insufficient Output Power
- Problem: The laser cutting machine has insufficient output power, causing ineffective vaporization of the metal and leading to excessive slag and burr formation.
- Solution: Check if the laser cutting machine is functioning properly. If there are any malfunctions, repair and maintain it promptly. If the machine is functioning normally, verify if the output value is correct.
Cause 3: Slow Cutting Line Speed
- Problem: The cutting line speed of the laser cutting machine is too slow, leading to poor surface quality and burr formation.
- Solution: Adjust and improve the cutting line speed to reach the normal value.
Cause 4: Impure Auxiliary Gas
- Problem: The purity of the auxiliary gas used in the laser cutting machine does not meet the required standard, leading to burr formation on the workpiece.
- Solution: Replace the auxiliary gas with a higher purity.
Cause 5: Extended Operating Time
- Problem: The laser cutting machine has been operating for too long, causing it to be in an unstable state and leading to burr formation.
- Solution: Turn off the laser cutting machine and restart it after a certain period of time to allow it to have a full rest.
Conclusion
In fact, burrs are the excessive residual particles on the surface of metal materials. When the laser cutting machine processes a workpiece, the energy generated by the laser beam irradiating the workpiece surface causes the surface to vaporize and evaporate, achieving the cutting purpose. If a material has burrs, it can be considered substandard; the more burrs there are, the lower the quality.
Therefore, we must pay extra attention to this issue during future processing!
