How to Solve Burrs During Laser Cutting Machine？

4月 3, 2025

Summary: Burrs often result from inefficient material ejection or excessive heat input. Test cuts and incremental adjustments to power, speed, gas pressure, and focus are critical. Always tailor settings to the specific material and thickness, and maintain equipment regularly to ensure consistent results. If burrs persist, review the entire process chain (gas quality, nozzle alignment, material prep, etc.) to identify hidden issues.

metal laser cutter machine

To solve burrs (rough edges) during レーザー切断, you need to address factors like heat input, material ejection, and equipment setup. Here are key strategies to minimize or eliminate burrs:

1. Optimize Laser Parameters

  • Power and Speed Balance:

Excessive power or slow cutting speed can over-melt material, leaving burrs.

Too low power or high speed may result in incomplete cuts, causing rough edges.

Adjust settings based on material type and thickness (e.g., higher power for thicker metals, but paired with appropriate speed).

  • Pulse Frequency (for pulsed lasers):

Use shorter pulses and controlled frequency to reduce heat accumulation and improve edge quality.

2. Assist Gas Selection and Pressure

  • Gas Type:

Use nitrogen (N₂) for non-ferrous metals (e.g., aluminum, stainless steel) to prevent oxidation and improve slag ejection.

Use oxygen (O₂) for carbon steel to enhance cutting speed, but ensure proper pressure to avoid excessive burning and burrs.

  • Gas Pressure:

Higher pressure improves molten material ejection, reducing burrs.

For example, stainless steel typically requires 12–20 bar nitrogen pressure, while carbon steel may need 6–10 bar oxygen.

3. Nozzle and Focus Alignment

  • Nozzle Condition:

Use a clean, undamaged nozzle of the correct diameter (e.g., 1.5–3.0 mm). Clogged or worn nozzles disrupt gas flow, leading to poor cuts.

  • Focus Position:

Ensure the laser beam is focused precisely on the material surface. An incorrect focal point (e.g., too high/low) reduces cutting efficiency and increases burrs.

4. Material Considerations

  • Surface Cleanliness:

Remove rust, oil, or coatings from the material surface, as contaminants can interfere with cutting.

  • Thickness Compatibility:

Ensure the laser’s power and gas settings match the material thickness. Thicker materials require slower speeds and higher gas pressure.

5. Equipment Maintenance

  • Lens and Mirrors:

Clean or replace contaminated optics to maintain beam quality and cutting precision.

  • Gas Purity:

Use high-purity assist gas (≥99.95% for nitrogen/oxygen) to avoid impurities that worsen burrs.

6. Post-Processing

  • Deburring Tools:

Use mechanical methods (e.g., grinding, filing, or sanding) to remove residual burrs if they occur.

  • Chemical Etching:

For small burrs, chemical solutions can smooth edges (common in stainless steel).

7. Advanced Techniques

  • Piercing Optimization:

Use a “soft start” piercing technique to avoid splatter and initial burrs.

  • Beam Modulation:

Adjust beam intensity dynamically during cutting (e.g., ramping power at corners) to reduce heat buildup.

タグファイバーレーザー切断機, レーザー切断機, metal laser cutter machine