Key Parameters of Metal Sheet Laser Cutting Machines
1. Auxiliary Gas Pressure
Functions: Blow away slag, cool material, support combustion. Common gases: oxygen (boosts efficiency for most metals), compressed air/nitrogen/inert gases (prevent combustion for alloys/non-metals).
Adjustment: Too high → wide slits/rough surfaces; too low → slag adhesion. Tune during operation for optimal quality.
2. Laser Power
Influences: Cutting speed, slit width, thickness, and quality. High-melting (alloys) or high-reflectivity (copper/aluminum) materials need higher power.
Optimal range: Below it → incomplete penetration/slagging; above it → excessive burning.
3. Cutting Speed
Ideal speed: Smooth, burr-free cuts with stable lines.
Trade-offs: Too slow → wide slits/low efficiency; too fast → incomplete penetration. Balances with gas pressure and laser power.
4. Focus Position
Definition: Distance between laser focus and workpiece surface, affecting roughness, slit shape, and residue.
Material-specific: Carbon steel → focus on surface; stainless steel → focus at 1/2 sheet thickness. Misalignment causes stains or residues.
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