What is the difference Single-layer and double laser nozzles?

The airflow speed of a single-layer nozzle is relatively slow, which is only suitable for cutting medium thickness materials; The double-layer nozzle has a very fast airflow speed and is suitable for cutting metal materials of various thicknesses.
Single-layer laser cutting nozzle and double-layer laser cutting nozzle have the following main differences in structure and function:

Structural Design:

• Single-layer nozzle: This type of laser cutting nozzle has only one airflow channel, where the gas flows through a single hole directly onto the cutting area.
• Double-layer nozzle: This nozzle features two airflow channels, typically an inner and outer layer, allowing gas to flow from both layers separately.

Airflow Control:

• Single-layer nozzle: With only one airflow channel, the direction and speed of the airflow are relatively fixed, making it difficult to adjust for more complex cutting needs.
• Double-layer nozzle: The inner and outer airflow can be controlled separately, allowing more flexibility in adjusting the pressure and direction of the airflow, which improves cutting precision and results.

Application Scenarios:

• Single-layer nozzle: Suitable for cutting thin materials or in situations where cutting quality is not a high priority. Its design is simple and cost-effective.
• Double-layer nozzle: Designed for cutting thicker materials and applications that demand higher precision. It offers better control over slag and gas, resulting in smoother cutting edges.

Cutting Quality:

• Single-layer nozzle: The single airflow can lead to slag adhesion during cutting, making the cut surface less smooth.
• Double-layer nozzle: By controlling the dual airflow, it reduces slag generation and adhesion, resulting in a smoother cut surface and improved overall cutting quality.

Cost:

• Single-layer nozzle: Its manufacturing cost is low, making it ideal for small workshops or businesses with limited budgets.
• Double-layer nozzle: Due to its more complex design, the manufacturing cost is higher. However, it significantly enhances cutting efficiency and quality, making it suitable for professional laser cutting and high-precision industrial applications.

In laser cutting nozzles, different nozzle diameters have a significant impact on the cutting process, affecting airflow speed, cutting quality, cutting speed, and material compatibility:
Airflow Speed and Pressure:

• Small diameter: A smaller nozzle diameter generates higher airflow speed and pressure, which helps to remove slag and oxides more effectively from the cutting area, improving cutting quality and precision. This is ideal for fine cutting of thin materials.
• Large diameter: A larger nozzle diameter generates lower airflow speed and pressure but provides broader coverage. It is suitable for cutting thicker materials, helping with heat dissipation and slag removal.

Cutting Quality:

• Small diameter: Delivers more concentrated airflow, ideal for precision cutting with higher edge quality and less burrs or roughness.
• Large diameter: Suitable for rough cutting and thick materials. Although the edge quality may be slightly lower, it ensures adequate airflow coverage and cooling.

Cutting Speed:

• Small diameter: Due to its concentrated airflow and higher pressure, it typically achieves faster cutting speeds, mainly for thin materials and fine cuts.
• Large diameter: Cutting speed is relatively slower but works well for thicker materials, ensuring sufficient cooling and slag removal.

Applicable Materials:

• Small diameter: Suitable for cutting thin metal sheets, fine parts, stainless steel, aluminum, and other materials requiring high precision.
• Large diameter: Ideal for cutting thick metal plates, carbon steel, alloy steel, and other materials where broader airflow coverage and cooling are required.

Examples:

• Small diameter (e.g., 1.0mm or 1.5mm):
  • Advantages: High precision, better cutting quality.
  • Applications: Fine parts, thin sheets, stainless steel, aluminum, etc.
• Large diameter (e.g., 2.5mm or larger):
  • Advantages: Suitable for thick materials, better cooling and slag removal.
  • Applications: Thick plates, carbon steel, alloy steel, etc.

Choosing the right laser nozzle diameter depends on factors like material thickness, required cutting quality, and specific processing needs. Smaller diameters are ideal for high-precision and thin materials, while larger diameters are better suited for thicker materials and situations where cooling is critical. Proper nozzle selection can significantly improve laser cutting efficiency and quality.