Guide to Choosing and Replacing Nozzles for Fiber Laser Cutters

In fiber laser cutting, nozzles may be small, but they have a direct impact on cutting quality and equipment lifespan. Choosing the right nozzle and replacing it in a timely manner is crucial for ensuring efficient and stable operation. This article will guide you through the functions, selection methods, and replacement steps for nozzles, helping you achieve optimal cutting performance.

Main Functions of the Nozzle

Nozzles play a vital role in fiber laser cutting:

They prevent molten material and debris from rebounding into the cutting head and damaging the lens;

They focus the assist gas flow and control its dispersion range and speed, improving cutting quality and precision.

Relationship Between Nozzle and Cutting Quality

Any deformation or residue in the nozzle can affect cutting performance, resulting in rough edges or incomplete cuts. Therefore, it is essential to regularly clean the nozzle and replace it promptly if any issues are detected, ensuring consistent processing quality.

Nozzle Selection

 By Diameter

Small-diameter nozzles: high gas speed, strong molten material removal, suitable for thin sheet cutting and precise edges.

Large-diameter nozzles: lower gas speed, weaker molten material removal, suitable for low-speed cutting of thick sheets. Using a large-diameter nozzle for thin sheets at high speed may cause splatter and damage protective lenses.

 By Type

Single-layer nozzle: commonly used for stainless steel cutting.

Multi-layer nozzle: typically used for carbon steel cutting.

How to Replace the Nozzle

Unscrew the old nozzle;

Install the new nozzle onto the nozzle holder and tighten;

After replacement, perform a capacitor calibration to ensure proper alignment.

Replacing the Nozzle Holder (Ceramic Body)

During cutting, collisions may occur, requiring the replacement of the nozzle holder:

Unscrew the nozzle;

Press the ceramic body by hand to keep it aligned, then remove the compression sleeve;

Align the two 2mm positioning holes on the new ceramic body with the positioning pins on the nozzle holder, press down, and rotate the compression sleeve into place;

Finally, reinstall the nozzle.

Although small, the nozzle directly determines cutting stability and precision. Proper selection and timely replacement of the nozzle not only ensure high cutting quality but also extend equipment lifespan. Xianming Laser consistently provides high-performance laser equipment and original accessories, helping businesses achieve efficient, precise, and reliable metal processing solutions.

Choosing Xianming laser means choosing professionalism and quality!

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