Mastering the following key points will help you better complete the precision cutting of laser cutting machines.
2018-09-13
The main advantage of laser cutting machines is that the beam energy density is high, the diameter is small, and the cutting seam is fine, allowing for the cutting of finer lines. However, to truly leverage its advantages, several key points must be mastered, the most important of which is to set the focal position correctly. The positive and negative positions of the focus can determine the diameter of the light spot, and the energy Password is also different. Therefore, controlling the focal position is very important. So how can we achieve the precision cutting advantages of laser cutting machines?
Since the laser power density greatly affects the cutting speed, the choice of lens focal length is an important issue.
The size of the light spot after focusing the laser beam is proportional to the lens focal length. The light spot size is very small when focused by a short focal length lens, and the power density at the focus is very high, which is very beneficial for material cutting. However, its disadvantage is that the focal depth is very short, and the adjustment margin is small, making it generally more suitable for high-speed cutting of thin materials.
Due to the wide focal depth of long focal length lenses, as long as there is sufficient power density, they are more suitable for cutting thick workpieces.
After determining which focal length lens to use, the relative position of the focus to the workpiece surface is particularly important for ensuring cutting quality.
Since the power density is highest at the focus, in most cases, the focus position is just at the surface of the workpiece or slightly below the surface.
Throughout the cutting process, ensuring a constant relative position of the focus to the workpiece is an important condition for obtaining stable cutting quality. Sometimes, due to poor cooling during lens operation, heat can cause changes in focal length, which requires timely adjustment of the focal position.
When the focus is in the optimal position, the cutting seam is minimized, and efficiency is maximized, resulting in the best cutting speed and optimal cutting results.
In most applications, the beam focus is adjusted to just below the nozzle.
The distance between the nozzle and the workpiece surface is generally about 1.5mm. Laser cutting.
Here are three simple methods for adjusting the focal position:
1. Printing Method: Move the cutting head from top to bottom, print the laser beam on laser adjustment paper, and the smallest printed diameter is the focus.
2. Inclined Plate Method: Use laser adjustment paper placed at an angle to the vertical axis and pull it horizontally to find the smallest point of the laser beam as the focus.
3. Blue Spark Method: Remove the nozzle, blow air, and pulse the laser onto a stainless steel plate, moving the cutting head from top to bottom until the blue spark is at its maximum, which is the focus.
As long as you master the above methods, it will be difficult to cut with poor processing technology! However, these also require the reliability and stability of the laser cutting machine itself to exert its effectiveness!
About Us
Shenzhen SHINHOP Laser Equipment Co., Ltd. It is a scientific and technological enterprise specializing in the research and development, production and sales of industrial laser processing equipment. It has been deeply engaged in the new energy industry for 20 years, focusing on the non-standard customization of automatic lithium battery cell assembly line and module PACK production line. It has successively obtained the national high-tech and specialized new enterprise certification.
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Customer service E-mail:info@shinhop.com
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