Laser cutting is one of the thermal cutting methods, using a focused high power density laser beam to irradiate the workpiece, so that the irradiated material quickly melts, vaporizes, ablates or reaches the ignition point, while blowing away the molten material with the help of a high-speed airflow coaxial to the beam, thus realizing to cut the workpiece apart.
First, laser cutting applications
Most laser cutting machines are operated by CNC programs for control or made into cutting robots. Laser cutting as a precision processing method, almost all materials can be cut, including two-dimensional cutting of thin metal plates or three-dimensional cutting.
In the field of automobile manufacturing, the cutting technology of small car roof windows and other space curves have been widely used. Germany's Volkswagen uses a laser with a power of 500W to cut complex shapes of thin body panels and various curved parts. In the aerospace field, laser cutting technology is mainly used for cutting special aerospace materials, such as titanium alloys, aluminum alloys, nickel alloys, chrome alloys, stainless steel, beryllium oxide, composite materials, plastics, ceramics and quartz. The aerospace parts processed by laser cutting are engine flame cylinder, titanium alloy thin-walled magazine, aircraft frame, titanium alloy skin, wing long truss, tailplane wall plate, helicopter main rotor, space shuttle ceramic heat insulation tile, etc.
Laser cutting and forming technology also has a wide range of applications in the field of non-metallic materials. Not only can cut high hardness, brittle materials, such as silicon nitride, ceramics, quartz, etc.; can also cut and process flexible materials, such as fabric, paper, plastic plates, rubber, etc., such as the use of laser for clothing cutting, can save 10% to 12% of the clothing material, improve the efficacy of more than 3 times.
Second, laser cutting materials
1. Structural steel
The material will get better results when cut with oxygen. When oxygen is used as the processing gas, the cutting edge will be slightly oxidized. For plates up to 4mm thick, high pressure cutting can be performed with nitrogen as the processing gas. In this case, the cut edges will not be oxidized. Thickness of 10mm or more plate, the laser use special pole plate and in the process to the workpiece surface oiling can get better results.
2. Stainless steel
In the case of acceptable cutting end oxidation can be used oxygen; using nitrogen to get oxidation-free burr-free edge, no further treatment is required. Coating oil film on the surface of the plate will get better perforation effect without reducing the processing quality.
With high reflectivity and thermal conductivity, aluminum up to 6mm thick can be cut, depending on the alloy type and laser capability. When cutting with oxygen, the cut surface is rough and hard. When cut with nitrogen, the cutting surface is smooth. Pure aluminum is very difficult to cut because of its high purity and can only be cut if the system is equipped with a "reflection and absorption" device. Otherwise the reflection will destroy the optical components.
Titanium sheets are cut with argon and nitrogen as process gases. Other parameters can be found in Nickel-Chromium steel.
5. Copper and brass
Both materials have high reflectivity and very good thermal conductivity. Brass up to 1 mm thick can be cut with nitrogen; copper up to 2 mm thick can be cut and the process gas must be oxygen. Copper and brass can be cut only if the system is equipped with a "reflection absorption" device. Otherwise, the reflection will destroy the optical components.
Third, the laser cutting machine processing cost calculation method
For the first contact with laser cutting processing products for friends, calculating its processing costs, is a big headache, if the manufacturer directly quoted, they always feel high, can not afford to pay, and let themselves to calculate it, they do not have a measure of the standard, because I do not know whether the price is the real price, as long as the recognition of laser cutting processing manufacturers rip off some, and today I help you solve This problem, to teach you how to calculate the cost of laser cutting.
Laser cutting processing by hourly billing and regional differences.
General per hour in the 400-1000 range, regional differences are also relatively large, Hefei, Zhejiang, Shenzhen area is relatively cheap; Beijing, Shanghai, Chongqing and other places are relatively expensive.
This and your region has a clear distinction, because the region's sheet metal materials and other prices are different, their labor costs are different, so the offer will also vary, but the price fluctuations are certainly within this range, but beyond this range.
Laser cutting processing cost calculation multiplier relationship
There are many companies in the calculation of the cost, not necessarily according to the laser cutting process, but according to the length of the cutting line to quote, carbon steel plate is generally 1.5 times the thickness of the plate per meter, that is, 4mm carbon steel plate cutting fee per meter = 4 * 1.5 = 6 yuan / meter.
The algorithm on the market price is generally: the price of cutting a meter = to cut the material plate thickness × 1.5 (not including the price of material costs, customers with material processing)
6 mm of mild steel plate laser cutting a meter of price: 6 (plate thickness) × 1.5 = 9 yuan / m
10 mm mild steel laser cutting a meter of price: 10 (plate thickness) × 1.5 = 15 yuan / m
12 mm mild steel laser cutting a meter of price: 12 (plate thickness) × 1.5 = 18 yuan / m
According to this formula can be derived from the price of cutting a meter of different thicknesses.
The price per meter of stainless steel is generally 2.5 times the thickness of the plate, and the price per meter of aluminum plate is generally 4 times the thickness of the plate.
At the same time, if the middle of the plate to cut holes, to charge perforation fee, perforation fee according to the different thickness of the plate is generally in 0.4-2 yuan ranging.
Some companies also charge air freight transfer, the general total price multiplied by 1.2 times, some companies do not charge air freight transfer, the price of large quantities can be cheaper.
Of course, the specific price has a lot to do with the size of the processing volume, the shape of the parts (compared to all the small holes can not be fully calculated by the number of meters), whether it includes freight, whether it is with material processing, etc.. Therefore, the general factory or processing plant will fluctuate, will be automatically measured according to the volume.