(1) Introduction to the process
Laser cutting is a non-contact processing with high energy density and good controllability. It focuses the laser beam into a spot with a minimum diameter of less than 0.1 mm, so that the power density at the focus can exceed 107 W to 108 W/cm 2 , and the irradiated material is quickly heated to the vaporization temperature to evaporate to form small holes. As the beam moves relatively linearly with the material, the apertures are continuously formed into slits having a width of about 0.1 mm. An auxiliary gas adapted to the material to be cut is also added during the cutting to accelerate the melting of the material, blow away the slag or protect the slit from oxidation.
Many metal materials, regardless of their hardness, can be laser-deformed without distortion. Most organic and inorganic materials can be laser cut. Among the commonly used engineering materials, except for copper, carbon steel, stainless steel, alloy steel, aluminum and aluminum alloys, titanium and titanium alloys, and most nickel alloys can be laser cut.
(B), the advantages of laser cutting
â—The slit is the narrowest, the heat affected zone is the smallest, the local deformation of the workpiece is very small, and there is no mechanical deformation.
â— It is a kind of contactless processing with good controllability. No tool wear, any hardness material (including non-metal) can be cut.
â— Wide adaptability and flexibility, easy to automate, and unlimited imitation cutting ability.
Laser cutting offers significant advantages over traditional sheet metal cutting methods. It has high cutting speed and high production efficiency; good cutting quality and narrow slit; good material adaptability and no tool wear; whether it is simple or complicated parts, it can be laser-precision and rapid prototyping; high degree of automation and simple operation. Low labor intensity, no pollution; low production cost and good economic benefits; the technology has a long effective life cycle.
Laser cutting also has significant advantages over conventional processing methods. In the thermal cutting method, neither oxygen-burnable (such as acetylene) cutting nor plasma cutting concentrates energy in a very small area like a laser beam, resulting in a wide slit, a large heat-affected zone, and a more pronounced deformation of the workpiece. Oxygen combustible cutting equipment is small, low investment, can cut steel plates up to 1m thick, is a very flexible cutting tool, mainly used to cut low carbon steel. However, due to its large heat-affected zone and low cutting speed, the incision is severely jagged and corrugated. Therefore, it is rarely selected for cutting materials up to 20 mm thick and requiring dimensional accuracy. Plasma cutting is similar to laser cutting speed and is significantly higher than acetylene flame cutting. However, the cutting energy is low, the top of the trimming edge is rounded, and the trimming edge is obviously curved. In operation, it is also necessary to prevent damage to the operator caused by the ultraviolet radiation generated by the arc.
Compared with laser cutting, plasma cutting is slightly better: it is more suitable for cutting thicker steel plates and aluminum alloys with high beam reflectivity. However, lasers can cut non-metals, while other thermal cutting methods do not. In the mechanical stamping processing method, the mass punching method is used to produce large-volume parts, which has the advantages of low parts cost and short production cycle. However, this method is difficult to adapt to design changes, equipment-specific, long manufacturing cycle and high cost. For small and medium-sized companies, the expertise of laser cutting will be fully demonstrated. Laser cutting facilitates the close fitting of the workpiece, which saves material compared to the need to reserve more material around each workpiece. For large and complex parts that require segmental punching, punching is required, resulting in a number of small shell-like edges on the cut edges, resulting in a large amount of corner fill. For thin metal sawing, the cutting speed is much slower than laser cutting. Moreover, as a flexible, non-contact, profiling tool, the laser can be cut from any point in the material in any direction, which is a great sigh for sawing. EDM or wire cutting is used for fine processing of hard materials. Although the cut is flat, the cutting speed is several orders of magnitude slower than laser cutting. Although water cutting can cut many non-metallic materials, the operating cost is high.
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Body Material: PVC
Sealing Material: EPDM
Design pressure:1.0Mpa(PN10 bar)
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