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Advantages of fiber laser cutting machine used in sheet metal processing industry

Views: 0     Author: hu     Publish Time: 2021-09-22      Origin: dapeng

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The traditional cutting process methods include flame cutting, plasma cutting, waterjet cutting, wire cutting and punch processing, etc. Laser cutting, as an emerging process method in recent years, is to irradiate a laser beam with a high energy density to the workpiece to be processed. It is partially heated and melted, and then the slag is blown off by high-pressure gas to form a slit. Laser cutting has the following advantages.


   1. Narrow slit, high precision, good slit roughness, no need for further processing after cutting.


2. The laser processing system itself is a set of computer systems, which can be conveniently arranged and modified, and is suitable for personalized processing, especially for some sheet metal parts with complex contours and shapes. There are many batches and small batches, and the product life cycle is not long. From the perspective of technology, economic cost and time, manufacturing molds is not cost-effective, and laser cutting is particularly advantageous.


  3. The energy density of laser processing is large, the action time is short, the heat affected zone is small, the thermal deformation is small, and the thermal stress is small. In addition, the laser is non-mechanical contact processing, which has no mechanical stress on the workpiece, and is suitable for precision processing.


  4. The high energy density of the laser is enough to melt any metal, and it is especially suitable for processing some materials that are difficult to process with high hardness, high brittleness, and high melting point.


   5. The processing cost is low. One-time investment in equipment is more expensive, but continuous and large-scale processing ultimately reduces the processing cost of each part.


  6. The laser is non-contact processing, with low inertia and high processing speed. The CAD/CAM software programming with the numerical control system is time-saving and convenient, and the overall efficiency is high.


  7. The laser has a high degree of automation, can be completely enclosed processing, no pollution, low noise, which greatly improves the working environment of the operator.


   Advantages of fiber laser cutting over early laser cutting:


   1. The laser is transmitted to the focusing head through the optical fiber, and the flexible connection method is easy to realize the automation work with the production line.


  2. The ideal beam quality of the optical fiber greatly improves the cutting quality and work efficiency.


3. The extremely high stability of the fiber laser and the long life of the pump diode determine that there is no need to adjust the current to adapt to the aging problem of the xenon lamp like the traditional lamp pumped laser, which greatly improves the stability of production and the consistency of the product. sex.


  4. The photoelectric conversion efficiency of the fiber laser is higher than 25%, and the system consumes less power, has a small size, and occupies a small area.


5. Compact structure, high system integration, few failures, simple and easy to use, no optical adjustment, low maintenance or even zero maintenance, truly "light emitting from the ground", plus anti-shock vibration, anti-dust, really suitable for industrial processing fields Applications.

At present, the low- and medium-priced laser cutting machine with a price of about 1 million, the selected lasers are basically 1-2KW fast axial flow CO2 lasers, which need to be filled with He, Ne, CO2 and other gases, and the maintenance cost is 20 yuan/hour The power consumption of the system is about 30KW (the main power-consuming components are the power supply of the laser, the cooling system and the bed), plus the blowing cost, the lens and the cutting nozzle and other consumables, the accumulated hourly usage cost is nearly 100 Yuan. The system including cooling and charging covers an area of up to tens of square meters.


There is also a low-priced laser cutting machine. The optional lasers are all 500W bi-xenon lamp pumped YAG lasers. Two xenon lamps need to be replaced every few hundred hours. The total cost is about 3 yuan/hour, and the system consumes The electricity is about 30KW (the main power consumption parts are the power supply of the laser, the cooling system and the bed), plus the blowing cost, the consumables such as the lens and the cutting nozzle, and the accumulated hourly usage cost is about 60 yuan. The footprint of the system including cooling and inflation is slightly smaller than that of the fast axial flow CO2 laser cutting system.


But the biggest problem of this system is that the life of the xenon lamp is short, and the current needs to be adjusted frequently to adapt to the aging problem of the xenon lamp, the second is to change the xenon lamp frequently to re-adjust the light path, and the third is a more complex hard light path system that requires frequent debugging and maintenance. Excellent optical quality suitable for cutting. All these factors have greatly affected the stability of industrial production and the consistency of products.


   At present, the industry generally combines the characteristics of the sheet metal industry to launch a combination of large format platform + fiber laser for cutting, which completely and effectively solves the above problems. The main design concepts are as follows. First, use fiber lasers instead of CO2 lasers and lamp-pumped lasers. Fiber laser technology is a laser technology that has developed rapidly in recent years. Compared with traditional lasers, it has better cutting quality, lower system cost, longer service life, lower maintenance costs, and lower power consumption. Moreover, the laser of the fiber laser can be transmitted through the fiber, which is convenient for connection with the motion platform and realizes flexible processing, which greatly simplifies the system design of the traditional laser cutting machine, improves the stability of the system, reduces the amount of maintenance, and is truly suitable for industrial processing. Field of application.


Secondly, based on the characteristics of the sheet metal industry, most of the workpieces are thin plates with a thickness of less than 2MM, and a fiber laser of 200 to 300 watts is selected. The cutting speed of thin carbon steel can reach 5-6 meters per minute, which can be compared with 2000W. The actual processing speed of the CO2 laser cutting system is equivalent, but the cost of the laser system is greatly reduced. In terms of bed accuracy, considering the accuracy requirements of most sheet metal parts, the positioning accuracy is generally designed to be around 100uM, which greatly reduces the cost of the bed. Of course, users can also choose our company's series of products with higher power levels and higher positioning accuracy according to the material and thickness of the processed workpieces, as well as the accuracy requirements.


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Dapeng laser specializing in R&D, manufacturing laser marking, cutting and welding machines, we also provides Laser sources and spare parts to the laser machine manufacturers in China and surrounding countries.
 

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