In the laser cutting machine for high-precision, large-thickness parts, some key technologies must be mastered and solved. Focus position control is one of them. One of the advantages of laser cutting is that the beam energy density is high, so the diameter of the focal point should be as small as possible to produce a narrow slit. Because the smaller the focal depth, the smaller the focal spot diameter. For high-quality cutting, the effective focal depth is also related to the lens diameter and cutting material. Therefore, it is very important to control the position of the focus relative to the surface of the material to be cut.
Since laser power density has a great influence on cutting speed, the choice of lens focal length is an important issue. The spot size is proportional to the focal length of the lens after the laser beam is focused. After the laser is focused by a short focal length lens, the spot size is small, and the power density at the focal point is very high, which is beneficial to the cutting of materials. But its disadvantage is that the focal depth is very short and the adjustment margin is small. It is generally suitable for high-speed cutting of thin materials. Since the long focal length lens has a wide focal depth, as long as there is sufficient power density, it is more suitable for cutting thick workpieces.
After determining which focal length lens to use, the relative position of the focal length and the surface of the workpiece is particularly important to ensure cutting quality. Due to the high power density of the focus, in most cases, the focus position is only on the surface of the workpiece or slightly below the surface during cutting. In the entire cutting process, ensuring that the relative position of the workpiece remains unchanged is an important condition to ensure the stability of the cutting quality. Sometimes, the lens is heated due to poor cooling, resulting in a change in focal length, so it is necessary to adjust the focal length in time.
When the focus is at the right position, the slit is small, the efficiency is high, and the cutting speed is fast, and good cutting results can be obtained. In most applications, the beam focus is adjusted to below the nozzle. The distance between the nozzle and the surface of the workpiece is generally about 1.5mm.
During laser application, problems such as focusing are often encountered. There are three simple ways to determine the focus position:
(1) Printing method: The cutting head is moved from top to bottom, and the laser beam is used to print on the plastic plate, focusing on the place with a smaller printing diameter.
(2) Inclined plate method: Use a plastic plate placed at an angle to the vertical axis to pull out horizontally, and find the smaller part of the laser beam as the focus.
(3) Blue spark method: Take off the nozzle, blow air, and irradiate the pulse laser on the stainless steel plate to move the cutting head from top to bottom until the big blue spark becomes the focus.
Metal laser cutting machine equipment has many advantages when used. First of all, the cutting accuracy of the fiber cleaver is very high. Even if a small workpiece can be cut to a set size, the cutting accuracy can be kept within a small error range. In addition, the cutting effect is that the surface of the workpiece is very smooth, and there are no burrs and uneven places after touching it with the hand.
And optical cutting speed The speed of fiber laser cutting machine is very fast, several times or even dozens of times faster than ordinary equipment. So when you use these equipment, you can complete related work in a short time, and others can improve your work efficiency, and the later maintenance cost is very low, basically there will be no equipment problems, as long as the big family Regular maintenance and maintenance of the metal fiber laser cutting machine can make it long-term use.
Due to the excellent performance of the laser cutting machine, whether it is processing stainless steel, alloy steel, silicon steel, etc., high-precision cutting can be achieved, and the overall cutting effect is very narrow. At present, my country has a great demand for stainless steel products, and the application of laser cutting machines will become more and more extensive. Compared with the past, the processing of stainless steel plates is a headache. Now the thickest stainless steel plate with this laser cutting machine has made a qualitative leap in processing. Therefore, with future development, it may require more application areas.
With the rapid growth of the production and consumption of stainless steel tubes, carbon tubes, aluminum tubes and other materials in my country, tube processing technology has also been rapidly developed, especially the emergence of automatic laser tube cutting machines, which has brought quality to the processing of tubes. leap. As a special automatic laser cutting machine, the automatic laser cutting machine is mainly used for laser cutting of metal pipes.
This automatic laser cutting machine can cut all kinds of programmed pipes of any shape. The high flexibility of the laser automatic pipe cutting machine provides strong technical support for more and more personalized processing.
Compared with traditional processing equipment, the precision of laser cutting sheet metal is much higher. At present, laser cutting technology is very mature, and curved overtaking made in China is becoming more and more popular in the international market. Fully automatic laser cutting machine equipment jumping laser occupies a place in the global market, which is inseparable from the product characteristics of the equipment itself.
If we want to choose a reliable fiber laser cutting machine manufacturer, we can compare from the following aspects:
First of all, you can see how long equipment manufacturers have been in this industry, because if they have been working in this industry for a long time, they will have more industry experience and more authoritative production of high-precision equipment Technology, such as laser cutting machine.
Next, can we look at the service attitude of fiber laser cutting machine manufacturers? If you want to understand this aspect, you can go to the factory for field inspection. Through close contact with employees, you can become more familiar with their service processes. We can see whether their production is more specialized, and we can study every detail repeatedly.
When we choose a fiber laser cutting machine manufacturer, we should see if they can produce the machine configuration they need. Since many manufacturers do not produce certain models, we may not be able to choose the models they need. In short, we can only make a choice after doing a lot of research.