Application

1. Laser cutting machine: The laser cutting machine is mainly used for medium and thin plates. It is mainly used for carbon steel and stainless steel plate material preparation with a plate thickness of less than 8mm, especially for parts with complex shapes and high cutting surface accuracy requirements. In addition to cutting various high melting point materials, heat-resistant alloys and superhard alloys and other special metal materials, laser cutting machines can also cut semiconductor materials, non-metallic materials and composite materials. Laser light has extremely high luminous intensity due to its almost non-divergent directivity. Compared with plasma cutting, the laser cutting speed is fast, the processing accuracy is high, the slit is narrow, the heat-affected zone is small, the deformation of the cutting plate is small, the cutting surface is not damaged, and subsequent processing is generally not required.

2. Plasma cutting machine: It can be used for cutting various metal materials such as stainless steel, aluminum, copper, cast iron, carbon steel, etc. The plate thickness is generally 6~40mm. Taking 260A plasma cutting as an example, the maximum cutting thickness can reach 60mm. The plasma cutting speed is fast, the slit is narrow, the slit is flat, and the allowable cost is low, and it has significant energy saving and economic effects.

Principle

1. The working principle of plasma cutting is to use oxygen or nitrogen as the working gas, use the heat of the high-temperature plasma arc to partially melt and evaporate the metal at the incision of the workpiece, and use the momentum of the high-speed plasma flow to remove the molten metal to form a slit. processing methods. Plasma cutting is suitable for cutting various metal materials, mainly for medium and heavy plate cutting. The advantages are fast cutting speed, narrow kerf, small heat affected zone, small deformation, and low operating cost; the disadvantage is that there is an inclination angle of 0.5°~1.5° in the verticality of the section, and the incision is hardened.

2. Laser cutting is a laser beam generated by a laser, transmitted through a series of mirrors, and finally focused on the surface of the workpiece by a focusing mirror, generating a local high temperature at the focus, so that the heated point of the workpiece is instantly melted or vaporized to form a slit. At the same time, in the process of cutting, auxiliary gas is added to blow out the slag at the cutting seam, and finally the purpose of processing is achieved. Laser cutting is mainly based on medium and thin plates, and the range of cutting materials is very wide (metals, non-metals, ceramics, glass, etc.). Because the laser has the characteristics of high direction, high brightness and high strength, the laser cutting speed is fast, the processing accuracy is high, and the cutting seam is very narrow, and generally no follow-up processing is required. To sum up, in terms of cutting materials, laser cutting has a wider range of material choices than plasma cutting; in thin plate cutting, laser cutting has more significant advantages; and in terms of cost, plasma cutting is cheaper than laser cutting. a lot of.

Cutting method

1. Advantages of laser cutting machine:

①The laser cutting kerf is small, and the cutting surface can be directly used for welding without grinding.

②The speed of the laser cutting machine is fast: the speed of cutting thin plates can reach 10m/min, which is much faster than that of the plasma cutting machine.

③The cutting quality of the laser cutting machine is good: the deformation is small, the surface roughness value is low, and the bevel is small.

④The laser cutting machine has high precision: the positioning accuracy can reach 0.05mm, and the repeat positioning accuracy can reach 0.02mm.

Disadvantage:

The cost of laser cutting is high, and the initial investment and post-maintenance require high costs; at present, the laser is cost-effective in cutting thin plates, but the efficiency is low when cutting medium and thick plates. Unless the quality requirements are high, it is not suitable for laser cutting.

2. Advantages of plasma cutting:

In the process of cutting medium and thick plates, very high cutting speeds can be achieved, much higher than laser and flame. The initial equipment investment is lower than that of laser, and the later maintenance cost is also lower than that of laser.

Disadvantages of plasma cutting:

①The verticality of the cutting surface is poor: one side of the cutting surface will have a large bevel, and the verticality will be poor.

② Generate more cutting slag: During the cutting process, cutting slag will be generated below the cutting surface. In order not to affect the quality of the subsequent process, this cutting slag must be removed by grinding, which also increases the labor cost.

③ Harmful gas and arc light will be generated: The principle of plasma cutting determines that harmful dust and arc light will be generated during the cutting process. However, underwater plasma cutting has also been used to avoid this defect.

④The consumption of cutting nozzles in the later stage will be more, and the current cutting nozzles are mainly imported, and the cost is high.