The surface of plasma cutting is rough, cutting thick plates has advantages, and the price is low. The cutting surface of laser cutting is smooth, and the plasma is rough, so you need to send someone to repair the burrs. The laser cutting surface is smooth, the compensation is small, the precision is higher, and it is a bit more expensive. In terms of cost, plasma is about 1/3 cheaper than laser. The disadvantage of plasma is the slit width, which is about 3mm. The most important component of plasma is the power supply, which is equivalent to the laser of a laser cutting machine. The power consumption of plasma is quite severe. Commonly used spare parts electrode protection nozzles are also quite expensive, especially the electrode punching is very expensive.
1: Flow and stability of air pressure
The air pressure, flow and stability of the plasma are very important factors in the cutting process. Many customers use a small flow air pump to supply plasma power. The air pressure supplied can reach a certain pressure when it is not working. If the plasma cutting gun starts when it is working When the gas is discharged, the air pressure displayed by the gas meter on the oil-water separator of the plasma power supply is lower than 0.4MPa, which means that your air pump has insufficient flow. The standard air pump flow of a normal 60A plasma power supply cannot be lower than 0.25m. Generally, the air pump stops the pressure when the pressure reaches 0.8MPa, and starts the pressure when it is lower than 0.4MPa. This setting is incorrect, because in the plasma cutting process, the pressure is started when the air pump is lower than 0.4MPa. In the uninterrupted cutting process of the plasma power supply, the loss of air pressure cannot meet the standard stable air pressure cutting above 0.4MPa, so the pressure of the air pump must be adjusted to less than 0.5MPa to start the pressure, so as to ensure that the plasma power supply is at a stable pressure. Carry out cutting to ensure cutting quality.
2: Burning torch nozzle and electrode
When you are in the cutting process, the incision quality is poor, incomplete cutting, incision buildup, dregs, and burning black phenomenon. If the problem of the water cooling system is ruled out, you should consider whether the electrode nozzle is used for too long at this time. Or the problem caused by the improper installation of the electrode nozzle.
3: Poor contact between the ground clamp and the workpiece
Because the plasma ground clamp is clamped on the back end of the equipment for a long time, it is often ignored by customers. After a long period of cutting, it will cause oxidation and rust, which will lead to poor contact between the plasma ground clamp and the machine tool and affect the plasma cutting effect. Wire clamps and fixed end workpieces are treated with rust prevention.