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20kw Fiber Laser Cutting Machine Cutting 40mm Carbon Steel

Cutting 40mm (approximately 1.57 inches) carbon steel with a 20kW fiber laser cutting machine requires precise control of various parameters to achieve optimal results.

Factors for Cutting 40mm Carbon Steel with a 20kW Fiber Laser

  1. Power and Speed Settings:
    • Power: A 20kW laser provides sufficient power to cut through 40mm carbon steel, though this is near the upper limit for many machines.
    • Cutting Speed: The cutting speed for this thickness is relatively slow, typically ranging from 0.1 to 0.4 meters per minute. The exact speed depends on the material’s quality and specific machine capabilities.
  2. Assist Gas:
    • Type: Oxygen (O2) is commonly used as the assist gas for carbon steel cutting. It helps to create an exothermic reaction, which aids in the cutting process.
    • Pressure: The assist gas pressure is crucial for thick materials, generally set between 8 to 15 bar (115 to 220 psi), depending on the desired cut quality.
  3. Focusing Lens and Beam Quality:
    • Focal Length: A longer focal length lens, such as 300-350mm, is often used to ensure the laser beam penetrates deep into the material.
    • Beam Quality: High beam quality (M² < 1.5) is essential for deep penetration and consistent cutting.
  4. Nozzle Design:
    • Nozzle Type: A suitable nozzle type and size, often larger to accommodate the thicker material and higher gas flow, should be used.
    • Nozzle Distance: The nozzle should be kept at an optimal distance from the material, typically around 2-3mm, to maintain effective gas flow and focus.
  5. Material Preparation:
    • Surface Condition: The surface of the carbon steel should be clean, free from rust, oil, and other contaminants to ensure a smooth cutting process.
    • Flatness: Ensuring the material is flat and stable is crucial to maintain focus and cut quality.
  6. Machine Parameters and Settings:
    • Piercing Technique: Controlled piercing is essential for starting the cut on thick materials. A gradual power ramp-up helps prevent excessive heat buildup and material warping.
    • Cut Path and Strategy: The cutting path should be optimized to minimize heat accumulation in one area, which can lead to distortion and poor cut quality.
  7. Cooling and Post-Processing:
    • Cooling: Adequate cooling mechanisms should be in place to manage the heat generated during the cutting process, such as water cooling or additional gas flow.
    • Deburring: Post-processing might be necessary to remove slag or rough edges, ensuring a clean and precise final product.
20kw fiber laser cutting machine
20kw fiber laser cutting machine

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