The optimal cutting speed for a laser cutting machine depends on several factors, including material type, thickness, laser power, and assist gas. Below are general speed ranges for common materials (using a **fiber laser** with 1kW–3kW power as an example):
1. Carbon Steel (O₂ Assisted Cutting)
1mm: 6–12 m/min
3mm: 2–4 m/min
6mm: 1–1.5 m/min
10mm: 0.5–0.8 m/min
Oxygen increases speed but may cause oxidation on edges.
2. Stainless Steel (N₂ Assisted Cutting)
1mm: 8–15 m/min
3mm: 2–5 m/min
6mm: 1–2 m/min
10mm: 0.3–0.6 m/min
Nitrogen prevents oxidation but requires slower speeds for thicker sheets.
3. Aluminum (High Reflectivity, N₂ Recommended)
1mm: 3–8 m/min
3mm: 1.5–3 m/min
6mm: 0.5–1.2 m/min
Slower than steel due to high reflectivity and thermal conductivity.
Key Factors Affecting Speed:
1. Laser Power: Higher power (e.g., 6kW) allows faster speeds, especially for thick metals.
2. Material Thickness: Speed drops significantly as thickness increases.
3. Assist Gas:
O₂: Faster for carbon steel (exothermic reaction).
N₂: Cleaner cuts on stainless/aluminum but slower.
4. Focus Position**: Incorrect focus reduces efficiency.
Tips for Optimization:
Test cuts: Start with manufacturer-recommended settings.
Quality check: Smooth edges = optimal speed; slag/dross = adjust speed/gas pressure.
Machine variations: Speeds differ by laser type (fiber vs. CO₂) and brand.
For precise parameters, provide material grade, thickness, and laser power.
--------Victor Feng
Rayther Laser