Tell you how to use a laser cutting machine to cut
Source：本站Time：2019/9/10 15:02:36
In laser cutting machines, it is essential to understand and handle several core technologies for parts with high precision or large thickness in laser cutting. Focusing area adjustment is just the first step in the table. The first advantage of laser processing is the high power density of the light, so the focused spot is as small as possible to create a narrow slit. Due to the smaller depth of focus of the focusing lens, the smaller the diameter of the focused spot. For high-quality laser cutting, a reasonable relative aperture is also related to the lens diameter and cutting material. Therefore, the manipulation of focus depends crucially on the area where the material surface is cut off.
Laser cutting machine
Because the particle beam illumination load has a significant impact on the laser cutting rate, the selection of lens focal length is a key challenge. After automatic focusing of particle beams, the size of the light spot is positively correlated with the focal length of the lens. When the light is focused by a short focal length lens, the size of the light spot is not large, and the illumination load at the focusing point is high, which is very beneficial for material laser cutting; But its drawback is that the relative aperture is very short, the adjustment capacity is small, and it is usually more suitable for high-speed laser cutting of thin materials. Because fixed focal length lenses have a wider focal depth, if they have sufficient power density, they are more suitable for laser cutting thick workpieces.
3D laser cutting machine
After specifying the application of several focal length lenses, the focus on the surface of the steel part depends on the location to ensure the quality of laser cutting. Given the high power density at the focal point, in most cases, during laser cutting, the focal point is just at the surface of the steel component or slightly below the surface. In the entire laser cutting process, ensuring that the focus and steel parts remain constant depending on the location is a key prerequisite for achieving balanced laser cutting quality. Occasionally, the lens may experience a change in focal length due to improper cooling, which requires immediate adjustment of the focusing area.
Mechanical arm laser cutting machine
When the focus is on the appropriate location, the cutting seam is small, efficient, and the laser cutting rate can achieve good laser cutting results. In most applications, the light focus is adjusted to just below the nozzle. The distance between the nozzle and the surface of the steel component is usually around 1.6mm.
Metal laser cutting machine
In the application of particle beams, difficulties such as autofocus are often encountered. There are several simple calculations for determining the focus area:
(1) Copying method: Use the laser cutting head to move power from top to bottom and perform particle beam printing on the plastic plate, focusing on the smaller diameter of the printed area.
(2) Oblique column method: Use a plastic plate placed on the side at a viewing angle with the vertical axis to drive it and focus on the smaller point of the parallel beam.
(3) Blue flame method: Remove the nozzle, blow air, and apply pulsed light onto the stainless steel plate, causing the laser cutting head to move from top to bottom until the blue flame is focused on a large area.