The Relationship Between The Nozzle And The Focal Point Of The Laser Cutting Machine

During the cutting process of laser cutting machine, the selection of nozzle and focal point plays an important role in cutting quality.
Below we will introduce the relationship between the nozzle and the focal point, and how to choose the right parameters to achieve the ideal cutting effect.

Nozzle Selection:
Nozzle is the part used to spray auxiliary gas in fiber laser cutting machine, and the common nozzle sizes are 1.4, 1.6, 1.8, 2.0 and 2.5. The choice of nozzle size depends on the thickness of the cutting material and the cutting needs.
Generally, when cutting thin materials, a smaller nozzle, such as 1.4 or 1.6, can be selected to obtain a finer cut. Whereas, when cutting thicker plates, a larger nozzle (e.g. 1.8 or larger) is required to eliminate dross generated during the cutting process.

Focal Point Setting:
The focal point is where the laser beam is focused and the area of highest energy density during cutting. The proper focal point setting can affect the quality and width of the cut seam. In general, the smaller the focal point, the thinner the cutting seam.
Depending on the cutting requirements, the width of the cutting slit can be controlled by adjusting the position of the focal point.

Relationship between nozzle and focal point:
There is a certain relationship between the nozzle and the focal point. When cutting thin materials and needing a fine cutting seam, you can choose a smaller nozzle and adjust the focal point to the right position to obtain a smaller focal point.
This will improve the accuracy and detail presentation of the cut.

Summarize:
The nozzle and focus selection of the laser cutting machine is an important factor affecting the cutting quality. According to the thickness and requirements of the cutting material, choosing the appropriate nozzle and adjusting the position of the focus can realize a finer and more accurate cutting effect.
In actual operation, parameter adjustment according to the cutting requirements, combined with practical experience, can achieve better cutting results.

Please note that the specific parameter settings and usage of the metal laser cutting machine may vary depending on different equipment and manufacturers. Please follow the manufacturer's recommendations and instructions before operation.