Various plasma arc cutting process parameters directly affect the stability, cutting quality and effect of the cutting process. The main cutting specification is briefly described as follows:
1. No-load voltage and arc-column voltage plasma cutting power supply must have a sufficiently high no-load voltage for easy arc ignition and stable plasma arc ignition. The no-load voltage is generally 120-600V, and the arc-column voltage is generally half of the no-load voltage. Increasing the voltage of the arc column can significantly increase the power of the plasma arc, which can increase the cutting speed and cut a larger thickness of sheet metal. The arc-column voltage is often not reached by adjusting the gas flow and increasing the internal shrinkage of the electrode, but the arc-column voltage cannot exceed 65% of the no-load voltage, otherwise the plasma arc will be unstable.
2. The increase of the cutting current and the cutting current can also increase the power of the plasma arc, but it is limited by the maximum allowable current. Otherwise, the plasma arc column will become thicker, the kerf width will increase, and the electrode life will decrease.
3. Increased gas flow rate The gas flow rate can not only increase the voltage of the arc column, but also enhance the compression of the arc column to make the plasma arc energy more concentrated and the injection force stronger, thus improving the cutting speed and quality. However, if the gas flow rate is too large, the arc column will become shorter and the loss of heat will increase, which will weaken the cutting ability until the cutting process is not performed properly.
4. The amount of shrinkage in the electrode The so-called shrinkage is the distance from the electrode to the end surface of the cutting nozzle. A suitable distance will allow the arc to be well compressed within the cutting nozzle and obtain an energy-concentrated, high temperature plasma arc for efficient cutting. If the distance is too large or too small, the electrode may be severely burned, the cutting nozzle burned, and the cutting ability may be reduced. The inner shrinkage generally takes 8-11mm.
5. Cutting nozzle height Cutting nozzle height refers to the distance from the cutting nozzle face to the surface of the workpiece being cut. The distance is generally 4~10mm. It is the same as the internal shrinkage of the electrode, and the distance must be appropriate in order to make full use of the cutting efficiency of the plasma arc, otherwise the cutting efficiency and the cutting quality will be reduced or the cutting nozzle will be burned.
6. Various factors above the cutting speed directly affect the compression effect of the plasma arc, that is, the temperature and energy density of the plasma arc, and the high temperature and high energy of the plasma arc determine the cutting speed. Therefore, all the above factors are related to the cutting speed. related. In the premise of guaranteeing the cutting quality, the cutting speed should be increased as much as possible. This not only increases productivity but also reduces the amount of deformation of the cut parts and the heat affected zone of the kerf area. If the cutting speed is not appropriate, the effect is reversed, and the sticky slag will increase, and the cutting quality will decrease.
Thanks to each user's support and trust, Wuhan Linghang CNC will live up to your trust, relying on sincerity, backed by strong technical strength, and committed to creating China's cost-effective, easy to operate, and thoughtful service of CNC cutting equipment; pilot licensing CNC cutting is a CNC cutting machine that can be used by the machining industry and can be used for ordinary oxygen cutting. Excellent product quality, excellent after-sales service, first-class management level, dedicated sales staff to serve you! Each CNC cutting machine has a complete after-sales service commitment and process, we will provide you with affordable prices, high-quality products and comprehensive after-sales service.
1. No-load voltage and arc-column voltage plasma cutting power supply must have a sufficiently high no-load voltage for easy arc ignition and stable plasma arc ignition. The no-load voltage is generally 120-600V, and the arc-column voltage is generally half of the no-load voltage. Increasing the voltage of the arc column can significantly increase the power of the plasma arc, which can increase the cutting speed and cut a larger thickness of sheet metal. The arc-column voltage is often not reached by adjusting the gas flow and increasing the internal shrinkage of the electrode, but the arc-column voltage cannot exceed 65% of the no-load voltage, otherwise the plasma arc will be unstable.
2. The increase of the cutting current and the cutting current can also increase the power of the plasma arc, but it is limited by the maximum allowable current. Otherwise, the plasma arc column will become thicker, the kerf width will increase, and the electrode life will decrease.
3. Increased gas flow rate The gas flow rate can not only increase the voltage of the arc column, but also enhance the compression of the arc column to make the plasma arc energy more concentrated and the injection force stronger, thus improving the cutting speed and quality. However, if the gas flow rate is too large, the arc column will become shorter and the loss of heat will increase, which will weaken the cutting ability until the cutting process is not performed properly.
4. The amount of shrinkage in the electrode The so-called shrinkage is the distance from the electrode to the end surface of the cutting nozzle. A suitable distance will allow the arc to be well compressed within the cutting nozzle and obtain an energy-concentrated, high temperature plasma arc for efficient cutting. If the distance is too large or too small, the electrode may be severely burned, the cutting nozzle burned, and the cutting ability may be reduced. The inner shrinkage generally takes 8-11mm.
5. Cutting nozzle height Cutting nozzle height refers to the distance from the cutting nozzle face to the surface of the workpiece being cut. The distance is generally 4~10mm. It is the same as the internal shrinkage of the electrode, and the distance must be appropriate in order to make full use of the cutting efficiency of the plasma arc, otherwise the cutting efficiency and the cutting quality will be reduced or the cutting nozzle will be burned.
6. Various factors above the cutting speed directly affect the compression effect of the plasma arc, that is, the temperature and energy density of the plasma arc, and the high temperature and high energy of the plasma arc determine the cutting speed. Therefore, all the above factors are related to the cutting speed. related. In the premise of guaranteeing the cutting quality, the cutting speed should be increased as much as possible. This not only increases productivity but also reduces the amount of deformation of the cut parts and the heat affected zone of the kerf area. If the cutting speed is not appropriate, the effect is reversed, and the sticky slag will increase, and the cutting quality will decrease.
Thanks to each user's support and trust, Wuhan Linghang CNC will live up to your trust, relying on sincerity, backed by strong technical strength, and committed to creating China's cost-effective, easy to operate, and thoughtful service of CNC cutting equipment; pilot licensing CNC cutting is a CNC cutting machine that can be used by the machining industry and can be used for ordinary oxygen cutting. Excellent product quality, excellent after-sales service, first-class management level, dedicated sales staff to serve you! Each CNC cutting machine has a complete after-sales service commitment and process, we will provide you with affordable prices, high-quality products and comprehensive after-sales service.
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