Machine à découper au laser

Comment éviter les bavures des machines de découpe laser

Comment éviter les bavures des machines de découpe laser

laser cutting machine burrslaser cutting machine burrslaser cutting machine burrs The most common problem of laser cutting machines in the processing process is that they are prone to burrs. In layman’s terms, sharp corners, burrs, and other irregular metal parts appear at the transition of the work-piece surface. However, common does not mean that the generation of burrs can be accepted. It directly affects the dimensional accuracy, shape and position accuracy, and surface roughness of the processed parts reduces product quality and brings subsequent inspection, assembly, use performance, and aesthetics. There are many problems, so burrs should be avoided as much as possible.

Causes courantes et solutions aux problèmes

laser cutting machine burrs
laser cutting machine burrs

Raison 1 : Les positions haut et bas du foyer du faisceau laser généré par la machine de découpe laser sont déviées, ce qui entraîne une non convergence de l'énergie sur la pièce à usiner et la pièce à usiner n'est pas entièrement vaporisée, ce qui augmente la quantité de laitier produite et n'est pas facile à souffler, ce qui facilite la production de bavures.

Solution: Ajustez la position du foyer du faisceau laser et ajustez-le au meilleur état en fonction de la position de décalage qu'il produit.

Raison 2 : La puissance de sortie de la machine de découpe laser n'est pas suffisante pour vaporiser efficacement le métal, ce qui entraîne des scories et des bavures excessives.

Solution: Vérifiez si le découpe au laser la machine fonctionne normalement. S'il est anormal, il doit être réparé et entretenu à temps ; si c'est normal, vérifiez si la valeur de sortie est correcte.

Raison 3 : La vitesse de la ligne de coupe de la machine de découpe laser est trop lente, ce qui endommage la qualité de surface de la surface de coupe et produit des bavures.

Solution: Ajustez et augmentez le Coupe vitesse de ligne à temps pour atteindre la valeur normale.

Raison 4: La pureté du gaz auxiliaire de la machine de découpe laser n'est pas à la hauteur de la norme requise, ce qui entraînera également la production de bavures sur la pièce.

Solution: Remplacez le gaz auxiliaire par une pureté plus élevée.

Raison 5: Le temps de travail de la machine de découpe laser est trop long, ce qui rend l'équipement instable, ce qui provoquera également des bavures.

Solution: Éteignez la machine de découpe laser et redémarrez-la après un certain temps, afin qu'elle puisse se reposer suffisamment.

Laser cutting is a precise and efficient method for cutting a wide range of materials, including metals, plastics, and composites. While laser cutting offers numerous advantages, it may still produce some burrs, though they are typically minimal compared to other cutting methods like mechanical cutting or plasma cutting.

Here’s what you need to know about burrs in laser cutting:

1. What Are Burrs in Laser Cutting?

Burrs are small, unwanted projections or irregularities along the edge of the cut material. They can be tiny metal flakes, raised edges, or sharp points. Burrs can affect the quality and appearance of the cut, especially in precision applications.

2. Causes of Burrs in Laser Cutting:

  • Material Properties: The type and thickness of the material being cut can influence the presence of burrs. Softer materials may produce fewer burrs than harder ones.
  • Laser Settings: The laser power, focus, and cutting speed settings impact the quality of the cut. Inappropriate settings can lead to burr formation.
  • Gas Type and Pressure: The choice of assist gas (typically oxygen, nitrogen, or air) and its pressure can affect burrs. Oxygen, for example, may create more burrs than nitrogen.
  • Material Surface Condition: The surface condition of the material (e.g., rust or contaminants) can influence burr formation.
  • Cutting Technique: The specific cutting technique, such as continuous wave or pulsed laser cutting, can also affect burr formation.

3. Reducing Burrs in Laser Cutting:

To minimize or eliminate burrs in laser cutting, consider the following strategies:

  • Optimize Laser Parameters: Adjust the laser power, focus, and cutting speed to achieve the best results for the specific material being cut.
  • Use Proper Assist Gas: Select the appropriate assist gas and control its pressure to minimize burrs. Nitrogen is often preferred for cleaner cuts in metals.
  • Material Preparation: Ensure the material’s surface is clean and free from contaminants, rust, or oxidation.
  • Use a Backing Plate: When cutting thin materials prone to warping, using a backing plate can help reduce burrs by providing support on the underside of the material.
  • Post-Processing: If minimal burrs are acceptable, you can remove them through secondary processes like grinding, deburring, or sanding.
  • Advanced Laser Systems: Some advanced laser cutting systems include features like automatic focus control and beam oscillation to further reduce burrs.

4. Importance of Burr Control:

Controlling burrs is essential in applications where precision and aesthetics matter. For example:

  • In the aerospace industry, burrs on critical components can compromise performance and safety.
  • In medical device manufacturing, burr-free edges are essential to prevent contamination and ensure the highest quality.

5. Consult with Laser Cutting Experts:

For specialized or critical applications, it’s advisable to consult with laser cutting experts who can provide guidance on the best techniques and settings to achieve the desired cut quality and minimize burrs.

In conclusion, while laser cutting is known for its precision and minimal burr formation compared to other cutting methods, it’s essential to optimize laser parameters, choose the right assist gas, and consider material properties to control and minimize burrs in laser-cut parts.

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