Fiber laser cutting is a non-contact processing with controllable high-energy density. The machine focuses the laser beam into a spot with whose minimum diameter less than 0.1mm, makes the power density at the focus exceeds 107W ~ 108W / cm2. The irradiated material is heated to the vaporization temperature and evaporates to form small holes. As the linearly movement of the beam that relative to the material, the small holes connect to form a cutting edge with width about 0.1 mm. The cutting also works with auxiliary gas during the cutting to accelerate the melting of materials, and blowing away the slag or preventing the materials oxidizing.
Some metal materials, no matter what hardness they have, all can be no cut with laser machine without deformation. Most organic and inorganic materials can be process with laser cutting. During the common engineering materials, except copper, most can be cut with laser, include carbon steel, stainless steel, alloy steel, aluminum and aluminum alloys, titanium and titanium alloys.
Compared with the traditional cutting methods, laser cutting has obvious advantages. Laser cutting with fast cutting speed, high production efficiency, good cutting quality and narrow cutting seam; good adaptability of materials and no tool wear; no matter simple or complex parts, all can be cut rapidly and accurately once; high automation, simple operation, low labor intensity, no pollution; low production costs, good economic returns; the technology effective life cycle is long.
Due to the intensification of technological transformation of large-scale enterprises such as domestic automobile, petroleum, textile machinery, farm machinery, motor vehicles and aerospace, the military enterprises are increasing their investment and the scale and product upgrading of SMEs such as sheet metal, electrical appliances and elevators are accelerating. China's cutting machine application market has entered a period of rapid growth. In 2000 and 2001 alone, more than 100 sets of large-scale cutting equipment were introduced in China. According to statistics, in recent years the average annual rate of increase of 25%. This pace of development shows that China's steel companies and establishing cross-industry and trans-regional laser processing centers will be good business opportunities for high returns on investment.
For iron and steel enterprises, it will take some unique advantages to establish a laser processing sheet distribution center. First of all, the self-produced sheet is large in scale and full in variety, it will save a great deal of time and cost throughout the production process. Secondly, as the national key production and sales base of sheet metal, we build a wide range of sales channels, customer relations and sales network; For some users that with small quantities but more varieties, we can provide finished products with laser high precision process, extending the service chain of the product, resulting in a second benefit; and the cutting waste can be quickly recycled and reused, at the same time, thus reduce the intermediate transporting time, saved costs and achieved the maximum profit.
Laser cutting can be used to establish a "plate distribution center" in the steel industry, according to the requirements of users to provide free follow-up cutting products and make computer discharging, to achieve a two-dimensional or three-dimensional cutting, and save materials maximumly, to achieve a win-win cooperation with steel mills and customers.