How to improve plasma cutting flatness
A common problem with thermal cutting is the cutting surface slag, which is the cutting flatness we are going to talk about. As far as CNC plasma cutting machine is concerned, there are still similar situations, taking into account that the current CNC plasma cutting machine is mainly used for stainless steel and other special materials cutting processing, its slag treatment is more difficult than carbon plate, which is more difficult for some fine processing enterprises or users who wish to reduce secondary processing, how to reduce residue residue, improve the quality of cutting plane, I believe is a concern of many enterprises.
Literally, the so-called cut surface plane plane refers to the highest point and lowest point of the cutting surface of the measured part, according to the direction of the cutting surface inclination of the two parallel lines.
Generally speaking, the cutting surface after processing with CNC plasma cutting machine is about 0.25 to 3.80mm thick melting layer, the residual chemical composition of the residue of this thickness is consistent with the material itself, including the chemical composition of the incision surface has not changed. For example, when we cut and process magnesium-containing aluminum alloy, if the magnesium metal content is 5%, after the residue analysis of the residue, the magnesium content in its composition will remain unchanged, even if the residual thickness of the slag reaches 0.25mm, there is no oxide. A dense weld can also be obtained if welding is carried out directly on the cutting surface. When cutting stainless steel, chromium carbide does not precipitate along the crystal boundary because the heating area quickly passes through a critical temperature of 649 degrees C. Therefore, cutting stainless steel with plasma arc does not affect its corrosion resistance. In other words, the residue of the slag in the permissible range does not affect the physical properties of the cutting material, but in order to reduce the thickness of the slag, by adjusting the operating gas pressure of the CNC plasma cutter and the speed of the torch walk can be achieved.
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