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Due to the maturity of laser cutting technology, manufacturers of laser cutting machines have appeared on the market, forming a competitive mass production scale and ensuring sufficient market supply. Taking the use of laser cutting machines as an example, comparing fiber laser cutting machines and CO2 lasers Processing characteristics of cutting machine and YAG solid-state laser cutting machine.
The focal point of the fiber laser can reach 25um, the heat-affected zone is small, the kerf is small, the deformation of the workpiece is small, and the cutting precision is higher. As a flexible processing method, pipeline lasers are more suitable for automatic control systems, with active tracking, active edge seeking, and active nesting, which greatly improves production efficiency. It is widely used in sheet metal cutting and has better performance and better satisfaction. Precise close processing requirements.
Now in the use of metal sheet cutting, fiber lasers have replaced a proper part of CO2 lasers and YAG solid-state lasers. Fiber laser cutting machines have been sold for many years. With the application of fiber laser cutting machines in various industries, more and more people are beginning to come into contact with optical fibers. laser cutter.
What are the advantages of fiber laser in laser cutting machine?
(1) Cutting capacity
The laser comes in at a much faster rate than traditional cutting. At a longer frequency, the laser can work at about 30 meters per minute, and the cutting speed and quality of the fiber laser cutting machine are several times that of the same power laser cutting machine. Fiber laser cutting machine has good beam quality, small cutting gap and flat cutting edge
(2) More efficient performance
The carbon dioxide laser cutting machine needs to adjust the laser bare, and the effect of optical path adjustment will affect the cutting quality, so the operator must have certain technical requirements, and the external optical path needs to be protected; YAG solid-state laser has a significant thermal lens effect, which requires Frequent protection; fiber laser fiber transmission, no adjustment, no protection, high stability, and simpler operation. Energy consumption level and comprehensive cost The photoelectric conversion rate of fiber laser is more than 30%, the energy conversion rate of carbon dioxide laser cutting machine under the same power is 5% to 15%, and the photoelectric conversion rate of solid-state laser is 3%, relatively It is said that the cutting cost of fiber laser cutting machine is lower.
(3) Quality, precision and cutting
Most of the traditional workbenches and low-quality machine tools are primitive and only feasible in a limited range. The raw materials are there and the quality is low. In order to maintain the position of the surface, two processing must be carried out until they are separated, and the accuracy cannot be accurately measured. Since the laser has a nice advantage of processing small additional parts, the damage to the raw material is almost zero, because the device works better, cutting spare parts as low as 0.05 mm.
(4) High efficiency and high precision
The fiber laser cutting machine is easy to operate, saving time and effort. It can realize high-density directional emission of energy, making its cutting route small and high-precision. And it adopts “non-contact processing”, which will not squeeze the material, so that the incision will not be deformed, and it will be smooth and burr-free. Compared with the traditional cutting, it will save the grinding work of the forming material.
(5) Applicability and wide range of use
The fiber laser cutting machine can use a lot of metal materials such as carbon steel, copper and other highly reflective materials, which is more suitable for the processing requirements of sheet metal manufacturing, 3C home appliance industry, and new energy industry. With high levels of capacity, minimal handling, low efficiency and air pollution.
How to judge the cutting quality of laser fiber cutting machine?
1. Section roughness
On the cutting surface of the cutting part, the surface roughness of the upper layer is generally uniform and does not change with the height, while the lower layer changes with the height. The closer to the lower edge, the greater the roughness of the surface .
2. Bottom burrs
The principle of laser cutting is that the high-energy laser beam vaporizes the metal surface, and the slag on the workpiece surface is blown away by the auxiliary gas. If the light spot is very small after gathering, the cutting precision is very high, and if the gap after cutting is also very small. Under the same circumstances, the precision of cutting stainless steel and cutting aluminum will be very different, the cutting precision of stainless steel will be higher, and the cutting surface will be smoother.
3. Verticality
When a laser cutting machine cuts a plate with a thickness of more than 2mm, the cuts are unevenly distributed, and the thickness direction varies greatly. Whether it is continuous laser cutting or pulse laser cutting, the surface of the cutting piece will be divided into top, The difference between the lower two layers is that the cutting stripes on the upper part of pulse laser cutting are directly related to the frequency of the pulse. The higher the frequency, the finer the stripes and the smaller the surface roughness.
4. Slit width
The beam emitted by the laser is conical, so the cut slit is also conical. Under this condition, the greater the thickness of the workpiece, the lower the accuracy, so the larger the kerf. The kerf width determines the minimum inner diameter of the profile. The smaller the kerf width, the more precise the profile and the smaller the hole diameter can be processed. This is also one of the important advantages of laser cutting instead of plasma cutting.
Post time: Aug-03-2023
