Influence of gas to steel sheet CNC table plasma cutting machine

In order to ensure the cutting quality of steel sheet CNC table plasma cutting machine and prevent oxidation and discoloration of cutting surface, it is generally necessary to select suitable working gas according to the characteristics of raw materials in the process of using numerical control table plasma cutting machine for steel plate.

First of all, we need to know that the working gas pressure and other parameters of the CNC table plasma cutting machine for iron and steel plate are doubtful, and the impact on cutting quality is mainly reflected in the following aspects: first, the stability of plasma cutting machine cutting arc; second, the formation of plasma cutting related to vulnerability. The replacement frequency of components is improved. The instability of plasma arc has a direct impact on the cutting quality. The instability of plasma arc will lead to the disadvantage of cutting off the good and bad, accumulate tumors and so on. It will also lead to the decrease of the life of the relevant components of the control system, and the frequent replacement of nozzles and electrodes.

When the working gas pressure of the CNC table plasma cutting machine for steel plate is too low, it means that the velocity of plasma arc is weakened, and the input air flow rate is less than the prescribed value. At this moment, the plasma arc with high energy and high speed can not be formed, and then the appearance of poor cutting quality, impermeable cutting and cutting off accumulated tumors is formed. The causes of insufficient air pressure are insufficient air input from the air compressor, low pressure regulation of the air conditioning valve of the cutter, oil stain in the solenoid valve, unknown gas path, etc. We require operators to pay attention to the investigation of air compressor output pressure before operation, if not in line with the requirements, adjustable.

In addition, when the working gas pressure of the NC table plasma cutting machine for steel plate is higher than 0.45 MPa, we judge that the cutting auxiliary pressure is too high, then after the plasma cutting machine is formed into an ion arc, the excessive air flow will blow away the concentrated arc column, making the arc column energy dissipation, weakening the cutting strength of the plasma arc. The causes of excessive air pressure are: improper input air regulation, excessive adjustment of air filter pressure relief valve or failure of air filter pressure relief valve. In this case, the operator needs to check whether the air compressor is suitable for adjustment, air compressor and air filter pressure relief valve pressure is not out of balance. After starting, such as rotary air filter pressure relief valve conditioning switch, indicating no change, clarify the air filter pressure relief valve failure, need to replace. Press or repair air compressor. If the input air pressure has reached the requirement, check whether the air filter pressure relief valve is correctly adjusted and whether the meter pressure can meet the cutting requirement. Otherwise, air filter and pressure relief valve should be protected normally, so as to ensure that the air is dry and dirty. If the input air quality is poor, it will form an oil stain in the solenoid valve, the valve core is difficult to open, the valve mouth can not be fully opened. Other. The air pressure of the cutting moment nozzle of the CNC table plasma cutting machine for steel plate is too low, and the solenoid valve needs to be replaced; the air passage section becomes smaller and the air pressure is too low, so the air pipe can be replaced according to the specification.