For example, when a steel plate having a thickness of 12 mm is cut, as the oxygen flow rate increases, the cutting speed gradually increases, and the cutting quality increases, but the value corresponding to a certain limit value decreases. The gas flow rate of the CNC flame cutting machine is mainly determined by the thickness of the cutting material. The fixed flow of gas supply will affect the overall cutting speed when cutting materials of different thicknesses. On the contrary, when the flow rate is fixed, the cutting speed can be cut at different cutting speeds. The thickness of the material that penetrates is also different. It should be pointed out here that the cutting of a single thickness material can improve the final cutting effect if the gas flow rate is properly increased, but if it exceeds the limit value, it will decrease. Therefore, there is an optimum oxygen flow value for each steel plate thickness. When cutting at the optimal oxygen flow value state, not only the cutting speed is the highest, but also the cutting effect is the best.
There are many factors that affect the gas flame cutting process, in which cutting oxygen flow plays a vital role in gas flame cutting. Cutting the oxygen stream requires both burning of the metal and blowing of the oxides formed by the combustion from the slit. Therefore, various parameters of cutting oxygen have an important influence on the gas cutting quality and cutting speed. Here Shanxi huaheng cutting effect on the cutting quality of the oxygen pressure to be briefly analyzed.
As the cutting oxygen pressure increases, the oxygen flow rate increases accordingly, so the thickness of the sheet that can be cut increases. However, the pressure is increased to a certain value, the thickness of the cuttable is also maximized, and the pressure is increased, and the thickness of the cuttable is decreased. The effect of cutting oxygen pressure on the cutting speed is roughly the same as the principle of cutting oxygen flow.
When cutting with a diffusion nozzle, if the cutting oxygen pressure meets the design pressure of the cutting nozzle, the cutting speed will increase as the flow rate and momentum of the cutting oxygen flow increase as the pressure increases. Under normal circumstances, when the CNC cutting machine uses ordinary cutting nozzle gas cutting, the cutting speed increases with the pressure increase under the condition of low pressure, but when the pressure exceeds 0.3MP, the cutting speed decreases instead; continue to increase the pressure. Not only will the cutting speed decrease, the incision will widen, and the incision section will be rougher.
In the gas flame cutting process of CNC flame cutting machine, there are many factors affecting the final cutting quality, in addition to the above mentioned factors, such as the power of preheating flame, composition of the metal to be cut, performance, surface state and initial Temperature, etc. Only by considering various factors can we make the cutting effect more perfect! Â
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