Preheating requirements of CNC flame cutting machine

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The preheating setting of CNC flame cutting machine is a means to adjust the flame flame temperature. In actual operation, the length of the preheating time of the CNC flame cutting machine needs to be considered according to the thickness of the cutting, but whether the higher the flame temperature is, the higher the cutting effect is. OK?
The Oxygen-Gas Cutting process of a CNC Flame Cutter is a process in which a stream of pure oxygen (at least 99.5%) is ignited and burned on the surface of the workpiece. The heating flame starts by heating the starting point of the workpiece to be cut to the ignition temperature. . Combustion begins by delivering cutting oxygen. As the heat rises, the combustion continues rapidly in adjacent workpieces. The moving torch cuts out a cut, and the two burning melts are blown by the kinetic energy of cutting the oxygen jet. Drop it. The following conditions must be completed when cutting.
Everyone who uses a CNC cutting machine knows that warming up in flame cutting is very important:
1. To be able to exclude the metal oxide produced, the melting temperature of the oxide must be lower than the melting point of the material.
2. The ignition temperature of the material must be lower than its melting temperature 3, and the ignition temperature should be continuously maintained at the cutting point. Heat loss is compensated by the heating flame. Unalloyed steels containing less than 0.3% carbon and low alloyed steels with carbon equivalents greater than 0.4% can be preheated to cut.
As the proportion of metal elements increases, the cutting process becomes more and more difficult. For this reason, chromium steels such as nickel or silicon metal, cast steel and other materials have no special preventive measures and are not suitable for oxygen cutting. These materials should be used for other processing. Method for thermal cutting. Others such as CNC plasma cutting machines will come in handy.
In general, about 0.25~3.80mm thick molten layer exists on the cutting surface after processing with a portable CNC plasma cutting machine. The residual slag chemical composition of this thickness is the same as the material itself, including the chemical composition of the cut surface. change. For example, when we cut and process magnesium alloy containing magnesium, if the magnesium metal content is 5%, the magnesium content of the composition will remain unchanged after the residue analysis of the residue, even if the residual thickness of the residue reaches 0.25mm, it does not appear. There are oxides. If the cutting surface is directly welded, dense welds can also be obtained.
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