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CNC flame cutting machine uses oxygen and gas (acetylene, propane, liquefied gas, etc.) to burn the heat energy to preheat the workpiece to a certain temperature, and then ejects high-speed cutting oxygen flow to make the preheated metal burn and release heat to achieve cutting. method. The flame cutting process is essentially a process in which the cut material (Fe) is burned in pure oxygen and is not a melting process. The entire flame cutting process is divided into the following four stages:
The metal surface of 1 cutting point is heated with a hot flame to the ignition point, and then starts to reflect the combustion in the cutting oxygen.
2 Burning reflects progress toward the lower metal layer.
3 Exclude slag that is reflected by combustion.
4 Heat the slag and the heat of the preheating flame to heat the metal upper layer of the cutting edge to the ignition point so that it will continue to produce a combustion reaction with oxygen.
Only Fe, low carbon steel, Mn, Ti and other materials have good flame cutting performance. High carbon steel, cast iron, stainless steel, non-ferrous metals, etc. cannot be cut with flame. Flame cutting to adapt to the cutting thickness of 5mm or more, generally can be cut to 200mm, or even thicker. For different sheet thicknesses, the corresponding type of torch must be selected. As the thickness of the plate increases, the oxygen pressure used for cutting also increases.
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