How is the cutting effect of metal laser cutting machine

How is the cutting effect of metal laser cutting machine
The metal processing industry occupies a very important position in the manufacturing industry, and the application of metal laser cutting machines allows many metal materials to be processed and shaped without deformation, making metal laser cutting machines more and more widely used. Although the processing speed of the laser cutting machine is still slower than the die punching, but it is no mold consumption, no need to repair the mold, but also save time to replace the mold, thus saving the processing costs, reducing the production costs, so from the overall consideration is more cost-effective. Here, we will briefly understand how the metal laser cutting machine cutting effect.
Metal laser cutting machine can be processed materials
Applicable materials: carbon steel, stainless steel, aluminium alloy, brass, copper, pickled plate, galvanised plate, silicon steel plate, electrolytic plate, titanium alloy, manganese alloy and many other metal materials. However, for highly reflective materials such as gold, silver, copper and aluminium alloys, which are also good conductors of heat transfer, laser cutting is difficult, if not impossible.
How well the metal laser cutting machine cuts
Laser cutting is burr-free, wrinkle-free and highly accurate. This is followed by an explanation of several common metal materials.
Carbon steel. Because carbon steel contains carbon, the reflection of light is not strong, absorbing the beam is very good, carbon steel in all metal materials is suitable for laser cutting machine processing, so carbon steel laser cutting machine in carbon steel processing has an unshakeable position.
The application of carbon steel is becoming more and more widespread, modern laser cutting machines can cut carbon steel plates up to a maximum thickness of 20MM, the use of oxidation melting cutting mechanism to cut carbon steel can be controlled in a satisfactory width range, for thin plates its cut can be as narrow as 0.1MM or so.
Stainless steel. Laser cutting of stainless steel uses the energy released when the laser beam hits the surface of the steel plate to melt and evaporate the stainless steel. For the manufacturing industry, where thin stainless steel sheets are the main component, laser cutting of stainless steel is a fast and effective process. Important process parameters that affect the quality of stainless steel cutting are cutting speed, laser power and air pressure.
Compared with mild steel, stainless steel cutting requires higher laser power and oxygen pressure, and stainless steel cutting although to achieve a more satisfactory cutting effect, but it is difficult to obtain a completely non-stick slag cut, more will use high-pressure nitrogen and laser beam coaxial injection method to blow away the molten metal and make the cutting surface does not form any oxide. This is a good method, but it is more expensive than conventional oxygen cutting. An alternative to pure nitrogen is the use of filtered shop compressed air, which consists of 78% nitrogen.
When laser cutting mirror stainless steel, laser film is required to prevent severe burns to the sheet!
Aluminium and alloys. Although laser cutting machines can be used in the processing of a wide range of materials, both metallic and non-metallic. But also some materials, such as copper, aluminium and its alloys, due to some of their own characteristics (high reflectivity) caused by laser cutting is not easy to process.
At present, aluminum laser cutting, widely used is the fiber laser and YAG laser, these two devices whether cutting aluminum or cutting other materials, such as stainless steel, carbon steel and other materials have not bad performance, but also can not process thicker aluminum. Generally the thickest 6000W can cut up to 16mm, 4500W can cut up to 12mm, but the processing costs are high. The auxiliary gas used is mainly used to blow away the molten product from the cutting area, which usually results in a good cut surface quality. For some aluminium alloys, care should be taken to prevent intergranular micro-cracks from developing on the cut surface.
Copper and alloys. Pure copper (violet copper) is basically not cut by CO2 laser beams because of its too high reflectivity. Brass (copper alloys) can be cut on thinner plates using a higher laser power and an auxiliary gas of air or oxygen.
Titanium and alloys. Laser cutting of titanium alloys commonly used in aircraft manufacturing is of good quality, although there will be a little sticky slag at the bottom of the cut, but it is easy to clear. Pure titanium couples well with the thermal energy transformed by the focused laser beam. The chemical reaction is intense when oxygen is used as an auxiliary gas, and the cutting speed is fast, but it is easy to generate an oxide layer at the cutting edge, which can also cause overburning if not careful. To be on the safe side, it is better to use air as an auxiliary gas to ensure the quality of the cut.
Alloy steels. Most alloy structural steels and alloy tool steels can be laser cut to achieve good edge quality. Even for some high-strength materials, flat, slag-free edges can be obtained with proper control of the process parameters. However, for high speed tool steels and hot die steels containing tungsten, melt and slagging can occur when processed by laser cutting machines.
Nickel alloys. There are many varieties of nickel-based alloys. Most of them can be cut by oxidation melting
Factors affecting the cutting speed and cutting effect of metal laser cutting machine
1, the working power and mode of laser equipment:
After research has proved that the higher the power of the laser equipment, even if it is cutting the same plate, the effect will be better than the general to. Laser cutting mode and the material is a certain degree of fit, the higher the effect is better.
2, the thickness of the material and the degree of roughness:
Laser cutting machine is most suitable for cutting thin plates, the best effect is the thickness of carbon steel below 12mm and stainless steel below 6mm, the quality of processing out of the significantly enhanced, efficiency also appeared to guarantee. If we say cutting <1mm material, the kerf will also be extremely smooth. Material surface roughness, material surface roughness also determines the quality of cutting, generally the smoother the material, the better the quality of cutting out.
3, cutting speed:
In fact, no matter what kind of material, can make cutting speed and material extremely coincident, then this time the cutting effect is the best, too fast or too slow will have an impact on the laser cutting.
4, the location of the focus:
Laser cutting machine focal point can be on, the cutting accuracy and precision to achieve the desired requirements.
5, auxiliary gas pressure and type:
The higher the pressure of the auxiliary gas, the higher the purity of the gas, the material adheres to the impurities will be very little, the cutting mouth is increasingly smooth. In general, oxygen cutting speed is the fastest, nitrogen cutting effect is the best, the cost is also low. Different gases will have different cutting effects.
The new ultra-high power laser cutting machine of Xintian Laser adopts a truss beam with truss plate and spacer to form a truss beam type composite bed, with high strength welding process, high temperature annealing to relieve stress, anti-deformation, low vibration to ensure high precision cutting; the cutting head adopts water-cooled air-cooled dual cooling structure to intelligently control the temperature and heat of the cutting head; the large enveloping time-sharing, zoning and segmented dust extraction structure to ensure the air volume, solving the problem of cutting fume that customers have been troubled with It can make the cutting heat expelled together with the smoke and dust, which has a very good protection effect on the stability of cutting. The new Tianwanwa integrates the performance advantages of ultra-high power, ultra-high precision, ultra-stability, intelligent operating system, convenience and efficiency, etc., and becomes the laser solution expert to solve the pain points of the industry.

Translated with DeepL

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