What is the laser?
Laser, an intensified light resulting from stimulated radiation
Basic Features:
High intensity, high brightness
Wavelength and frequency determination, good monochrome
Good coherence, long coherence length
Good direction, almost a beam of parallel light
When the laser beam to the surface of the workpiece, the light energy is absorbed, converted into heat, the irradiation spot temperature rises rapidly, melting, gasification and the formation of pits, due to thermal diffusion, so that spots around the metal melting, small pit metal vapor Rapid expansion, resulting in micro-explosion, the melt spit out at high speed and produce a highly directional anti-shock wave, so the surface to be machined play a small hole up and down.
Laser features
1. Cutting quality is good
Laser cutting compared with other thermal cutting methods, the general characteristics of the cutting speed, high quality. Specifically summarized as the following aspects.
Due to the small laser spot, high energy density and fast cutting speed, laser cutting can achieve better cutting quality.
① laser cutting incision narrow, parallel to both sides of the incision and perpendicular to the surface, cutting parts of the dimensional accuracy of ± 0.05mm.
② cutting surface smooth and beautiful, the surface roughness of only a few tens of microns, and even laser cutting can be used as the last process, without machining, spare parts can be used directly.
③ After laser cutting, the width of HAZ is very small, and the performance of the material near the kerf is almost unaffected. Moreover, the deformation of the workpiece is small, the cutting precision is high, the geometry of the kerf is good, and the cross-sectional shape of the kerf is relatively regular Rectangle. Laser cutting, oxyacetylene cutting and plasma cutting methods are shown in Table 1, the cutting material is 6.2mm thick mild steel.
2. Cutting efficiency
Due to the transmission characteristics of the laser, the laser cutting machine is generally equipped with multiple CNC workstations, the entire cutting process can be fully CNC. Operation, just change the NC program, you can apply different shapes of metal parts cutting, both for two-dimensional cutting, but also to achieve three-dimensional cutting.
3. Cutting speed
Cut a 1mm thick mild steel plate with a laser power of 2000W at a cutting speed of 24m / min. Cut 2mm thick stainless steel at a cutting speed of 9m / min.
4. Non-contact cutting
Laser cutting torch without contact with the workpiece, there is no tool wear. Processing of different shapes of parts, do not need to replace the "tool", just change the laser output parameters. Laser cutting process low noise, vibration, pollution-free.
5. Cutting a wide range of materials
Metal matrix composites, leather, wood and fiber. However, for different materials, due to their own thermal physical properties and different rates of laser absorption, it shows different laser cutting adaptability. CO2 laser, laser cutting of various materials.
Laser cutting applications
Most laser cutting machines are controlled by CNC programs or are made into cutting robots. As a precision machining method, laser cutting can cut almost all materials, including two-dimensional cutting or three-dimensional cutting of thin metal plates.
In the field of automobile manufacturing, the cutting technology of space curves such as car roof windows has been widely used. Volkswagen of Germany with a power of 500W laser cutting complex shapes of body panels and a variety of curved surface. In the field of aerospace, laser cutting technology is mainly used for cutting special aviation materials such as titanium alloy, aluminum alloy, nickel alloy, chrome alloy, stainless steel, beryllium oxide, composite material, plastic, ceramic and quartz. Laser cutting of aerospace components with engine flame tube, titanium alloy thin-walled casing, the aircraft frame, titanium skin, wing stringer, tail wall panels, helicopters main rotor, shuttle ceramic tiles and so on.
Laser, an intensified light resulting from stimulated radiation
Basic Features:
High intensity, high brightness
Wavelength and frequency determination, good monochrome
Good coherence, long coherence length
Good direction, almost a beam of parallel light
When the laser beam to the surface of the workpiece, the light energy is absorbed, converted into heat, the irradiation spot temperature rises rapidly, melting, gasification and the formation of pits, due to thermal diffusion, so that spots around the metal melting, small pit metal vapor Rapid expansion, resulting in micro-explosion, the melt spit out at high speed and produce a highly directional anti-shock wave, so the surface to be machined play a small hole up and down.
Laser features
1. Cutting quality is good
Laser cutting compared with other thermal cutting methods, the general characteristics of the cutting speed, high quality. Specifically summarized as the following aspects.
Due to the small laser spot, high energy density and fast cutting speed, laser cutting can achieve better cutting quality.
① laser cutting incision narrow, parallel to both sides of the incision and perpendicular to the surface, cutting parts of the dimensional accuracy of ± 0.05mm.
② cutting surface smooth and beautiful, the surface roughness of only a few tens of microns, and even laser cutting can be used as the last process, without machining, spare parts can be used directly.
③ After laser cutting, the width of HAZ is very small, and the performance of the material near the kerf is almost unaffected. Moreover, the deformation of the workpiece is small, the cutting precision is high, the geometry of the kerf is good, and the cross-sectional shape of the kerf is relatively regular Rectangle. Laser cutting, oxyacetylene cutting and plasma cutting methods are shown in Table 1, the cutting material is 6.2mm thick mild steel.
2. Cutting efficiency
Due to the transmission characteristics of the laser, the laser cutting machine is generally equipped with multiple CNC workstations, the entire cutting process can be fully CNC. Operation, just change the NC program, you can apply different shapes of metal parts cutting, both for two-dimensional cutting, but also to achieve three-dimensional cutting.
3. Cutting speed
Cut a 1mm thick mild steel plate with a laser power of 2000W at a cutting speed of 24m / min. Cut 2mm thick stainless steel at a cutting speed of 9m / min.
4. Non-contact cutting
Laser cutting torch without contact with the workpiece, there is no tool wear. Processing of different shapes of parts, do not need to replace the "tool", just change the laser output parameters. Laser cutting process low noise, vibration, pollution-free.
5. Cutting a wide range of materials
Metal matrix composites, leather, wood and fiber. However, for different materials, due to their own thermal physical properties and different rates of laser absorption, it shows different laser cutting adaptability. CO2 laser, laser cutting of various materials.
Laser cutting applications
Most laser cutting machines are controlled by CNC programs or are made into cutting robots. As a precision machining method, laser cutting can cut almost all materials, including two-dimensional cutting or three-dimensional cutting of thin metal plates.
In the field of automobile manufacturing, the cutting technology of space curves such as car roof windows has been widely used. Volkswagen of Germany with a power of 500W laser cutting complex shapes of body panels and a variety of curved surface. In the field of aerospace, laser cutting technology is mainly used for cutting special aviation materials such as titanium alloy, aluminum alloy, nickel alloy, chrome alloy, stainless steel, beryllium oxide, composite material, plastic, ceramic and quartz. Laser cutting of aerospace components with engine flame tube, titanium alloy thin-walled casing, the aircraft frame, titanium skin, wing stringer, tail wall panels, helicopters main rotor, shuttle ceramic tiles and so on.
