What is the general power of plasma CNC cutting machine

No matter what kind of plasma cutting machine, it has its own most suitable cutting size range. Generally, low-power plasma is suitable for cutting thin plates. It is well known that plasma power is too large, but it is not suitable for cutting thin plates!

At present, domestic 40-60A plasma cutting machines are used for domestic steel plates below 2mm, and imported ones are occasionally used, but the number is not large. Here is a serious statement that for steel plates below 2mm, remember that except for the high-speed desktop thin plate special plasma cutting machine, any other models: such as portable, gantry, etc., are not suitable for cutting. Anything over 2mm is not subject to this restriction and can be used. For thicker steel plates, such as 2-16mm steel plates, portable and gantry models can be cut, even thicker steel plates, such as 25mm plates or even thicker ones, are only suitable for gantry models!

1. Increasing the cutting current can also increase the power of the plasma arc, but it is subject to the maximum allowable current Limit, otherwise the plasma arc column will become thicker, the slit width will increase, and the electrode life will decrease.

2. Electrode shrinkage The so-called shrinkage refers to the distance between the electrode and the end surface of the cutting nozzle. A proper distance can make the arc get a good compression in the cutting nozzle and obtain The plasma arc with concentrated energy and high temperature performs effective cutting. If the distance is too large or too small, the electrode will be seriously burned, the cutting tip will be burnt and the cutting ability will be reduced. The shrinkage is generally 8-11mm. Pay attention to the WeChat public account: Huining Welding and cutting More exciting information is waiting for you!

3. Plasma cutting power supply with no-load voltage and arc column voltage must have a high enough no-load voltage to easily start the arc and make the plasma arc burn stably. The no-load voltage is generally 120-600V, and the arc column voltage is generally half of the no-load voltage. Increasing the arc column voltage can significantly increase the power of the plasma arc, thus increasing the cutting speed and cutting larger thickness metal plates. 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.

4. The above factors of 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 It depends on the cutting speed, so all the above factors are related to the cutting speed. On the premise of ensuring the cutting quality, the cutting speed should be increased as much as possible. This not only improves productivity, but also reduces the amount of deformation of the cut parts and the heat-affected area in the kerf zone. If the cutting speed is not appropriate, the effect is opposite, and the sticking slag will increase and the cutting quality will decrease.

5. Increasing gas flow rate can not only increase the arc column voltage, but also enhance the compression of the arc column so that the plasma arc energy is more concentrated and the jetting force is stronger. Therefore, the cutting speed and quality can be improved. However, if the gas flow is too large, it will shorten the arc column, increase the heat loss, and weaken the cutting ability until the cutting process cannot be performed normally.

6. Cutting nozzle height Cutting nozzle height refers to the distance from the end of the cutting nozzle to the surface of the workpiece to be cut. The distance is generally 4~10mm. It is the same as the internal shrinkage of the electrode, and the distance must be appropriate to give full play to the cutting efficiency of the plasma arc, otherwise the cutting efficiency and cutting quality will be reduced or the cutting nozzle will burn out.

This general metal processing technician knows that plasma is used to cut stainless steel and other alloy materials is its strength, and carbon steel plates mainly rely on flame cutting machines. So as long as there is stainless steel, a plasma cutting machine must be selected! Otherwise, processing cannot be achieved with flame!