Today's sheet metal enterprises, the use of laser cutting has long been commonplace. The advantage of laser cutting is that it is a non-contact material processing means, so it will not damage the surface of the plate, as well as cut off the surface will not leave burrs, is a can greatly reduce the process of the back channel process process process. However, laser cutting will also encounter a variety of practical difficult problems. Here we look at the cutting difficulties and solutions of galvanized steel plates, which are more commonly used in daily processing.
As we all know, the role of galvanized steel plate is to protect the carbon steel inside by galvanizing the surface, long-term use is not easy to rust a sheet. Although this plate will be slightly more expensive than ordinary carbon steel plate, but because there is no need for rust-proof spraying and other back-channel processes, so from the cost of the entire product, or cost-effective.
But after laser processing, the situation is different. From the auxiliary gas point of view, there are generally three cutting processes for galvanized steel plates, namely air cutting, oxygen cutting and nitrogen cutting. Let's first analyze the advantages and disadvantages of each of the three cutting processes:
Air cutting: The advantage is that the processing cost is very low, only need to consider the laser itself and the air compressor's electricity bill can be, without the need to generate high auxiliary gas costs, while the cutting efficiency on the sheet can match nitrogen cutting, is a cost-effective and efficient cutting method. But the drawbacks on the cut-off surface are equally obvious. First of all, the air cutting section will produce the bottom surface burrs, laser processing products must also go through the secondary processing of hairsabers, etc. , not conducive to the entire product production cycle. Secondly, the air cutting section is prone to blackening, affecting the quality of the product. Therefore, the advantages of laser processing without subsequent treatment can not be reflected, so in the processing of galvanized steel plate, many enterprises are not willing to choose air cutting methods.
Oxygen cutting: This is the most traditional and standard cutting method. The advantage is the low cost of gas, and in sheet metal processing based on carbon steel, there is no need to switch auxiliary gases frequently, making it easy for plant management. However, the disadvantage is that after oxygen cutting, the surface of the cut-off surface will be left a layer of oxidizing skin, if the product with oxidizing skin is soldered directly, a long time, oxidizing skin will naturally peel off. This is one of the reasons why galvanizing plate welding is easy to fake.
Nitrogen cutting: the use of nitrogen for high-speed processing, because the use of nitrogen is different from the role of combustion oxygen, but play a protective role, so the cutting section will not produce oxide skin. Many enterprises also like this advantage, so the cutting of galvanized steel plate will often use nitrogen processing. But the downside of nitrogen cutting is here: because the cutting section is completely unsealed, the product is prone to rust. And in order not to let the product rust, it had to be sprayed again, as a result, at a greater cost to buy back the galvanized plate, but also did not play its galvanizing layer characteristics, I have to say quite a pity.
Summarizing the advantages and disadvantages of these processing methods, we recommend Ermaksan Yumak's unique galvanized steel plate cutting solution. Using the same, almost negligible auxiliary gas cost as air cutting, to achieve a cutting section between oxygen cutting and nitrogen cutting, although the cutting section will have a small amount of oxide skin, but it has been proved that will not affect the back process. Instead, because of these oxidizing skins, protect the cutting section, not easy to rust.
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