Tell you how to cut with a laser cutting machine

In the laser cutting machine, it is necessary to understand and deal with several types of core technologies for parts with high laser cutting precision or large thickness. The focus adjustment is only the top of the list. The first advantage of laser processing is that the power density of the light is high, so the focus of the beam is as small as possible, which is convenient for creating a narrow slit. Since the focal depth of the focusing lens is smaller, the diameter of the focused spot is larger and smaller. For high-quality laser cutting, the reasonable relative aperture is also related to the lens diameter and the cut material. Therefore, it is critical to manipulate the focus depending on where the surface layer of the material is cut off.

Laser cutting machine

Because the particle beam illumination load has a great influence on the laser shear rate, the selection of the lens focal length is a key problem. After particle beam autofocus, the spot size is positively related to the focal length of the lens. After the light is focused by the short focal length lens, the spot size is not large, and the lighting load at the focus is very high, which is very beneficial to the laser cutting of the material; but its defect is the relative aperture Very short, small adjustment capacity, usually more suitable for high-speed laser cutting thin materials. Because the fixed focal length lens has a wider focal depth, if it has sufficient power density, it is more suitable for laser cutting thick workpieces.

3D laser cutting machine

After clarifying the application of several focal length lenses, the position of focus and the surface layer of the steel part is very important to ensure the quality of laser cutting. In view of the high power density at the focal point, in most cases, the focal point is just at the surface of the steel during laser cutting, or slightly below the surface. In all laser cutting processes, ensuring that the focus and the steel parts are constant is the key prerequisite for obtaining a balanced laser cutting quality. Occasionally, the lens is heated due to improper cooling during operation, which causes the focal length to change, which requires immediate adjustment of the focus position.

Manipulator Laser Cutting Machine

When the focus is on the suitable part, the slit is small, the efficiency is high, and the laser cutting rate can get good laser cutting results. In most applications, the light focus is adjusted to just under the nozzle. The distance between the nozzle and the surface of the steel part is usually 1.6mm up and down.

Metal Laser Cutting Machine

In the steps of particle beam application, we often encounter problems such as auto-focusing. Generally, there are several simple calculations to clarify the focus position:

(1) Copy method: Make the laser cutting head work from top to bottom, carry out particle beam printing on the plastic plate, and focus on the smaller printing diameter.

(2) Oblique column method: Use a plastic plate placed on the side at an angle of view with the vertical axis to drive it to find the smaller point of the parallel beam to focus.

(3) Blue flame method: remove the nozzle, blow air, and hit the pulsed light on the stainless steel steel plate to make the laser cutting head move from top to bottom until the blue flame is focused.

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