Coloured galvanized sheet is a kind of steel sheet which is not easy to rust for a long time because it is galvanized on the outside to maintain the inner carbon steel. Although this kind of sheet is slightly more expensive than ordinary carbon steel plate, it is still cost-effective in terms of the cost of the whole product, because there is no need for subsequent processes such as spraying to prevent rust.

However, after laser processing, the condition of color-coated galvanized sheet is different. From the viewpoint of auxiliary gas, there are generally three kinds of cutting processes for color-coated galvanized sheet, namely air cutting, oxygen cutting and nitrogen cutting. Air cutting: The advantage is that the processing cost is very low. It only needs to consider the electricity cost of the laser and the air compressor. There is no high cost of auxiliary gas. However, the cutting power on the thin plate can resist nitrogen cutting. It is an economical and efficient cutting method.

However, the defects in the blocking section are also significant. Above all, the bottom burr will occur in the section cut by air, and the products processed by laser must be processed through the past burr and other secondary processing, which is not conducive to the whole production cycle of the product. Secondly, the section cut by air is simply blackened, which affects the quality of products.

Therefore, the advantages of laser processing of hot-dip galvanized sheet can not be shown without follow-up treatment, so many enterprises are reluctant to choose air cutting in the processing of color-coated galvanized sheet. We also know the advantages and disadvantages of these three kinds of cutting technology. Air cutting technology is seldom used nowadays. When we use it, we still need to combine our actual situation