How to improve the processing quality of CNC plasma cutting machine

How to improve the processing quality of CNC plasma cutting machine, let's first understand the concept of flame cutting and plasma cutting:

      1. What is flame cutting Flame cutting is the oldest thermal cutting method, and the thickness of the cutting metal ranges from 1 mm to 1 meter, but when the thickness of the vast majority of low carbon steel plates you need to cut is below 20 mm, other cutting method. Flame cutting is to use the high temperature generated during the combustion of iron oxide to cut carbon steel. The design of the flame cutting torch provides sufficient oxygen for burning iron oxide to ensure good cutting results. The cost of flame cutting equipment is low and it is a relatively cost-effective means of cutting thick metal sheets, but it has its shortcomings in thin sheet cutting. Compared with plasma, the heat affected zone of flame cutting is much larger, and the thermal deformation is relatively large. In order to cut accurately and effectively, the operator needs to have high technology to avoid the thermal deformation of the metal plate in time during the cutting process.

      2. What is plasma cutting? Plasma cutting is the use of high-speed ionization of high-speed airflow ejected from the nozzle at high temperature to form electrical conductors. When the current passes through, the guide gas flow forms a high-temperature plasma arc. The heat of the arc melts (and evaporates) the metal at the incision of the workpiece locally, and uses the power of the high-speed plasma gas flow to remove the molten metal to form a processing method of the incision. The elongated and stable plasma arc formed by annular gas flow technology ensures smooth and economical cutting of any conductive metal. After years of exploration, plasma technology has developed by leaps and bounds. Recent advances have been to increase the power to speed up plasma cutting while improving the quality of the cut.

      The following editor will share with you some suggestions on how to improve the processing quality of CNC plasma cutting machine:

     1. The height and stability of the cutting nozzle;

     2. The matching of cutting speed and working air pressure.

     3. It has the advantages of high speed, small deformation, high precision and high section finish. The parts cut by the CNC cutting machine can be directly welded and applied without machining. But CNC plasma cutting machine uses plasma arc for cutting, which is compared with oxygen cutting. There are still some defects, mainly reflected in the large inclination of the cutting surface, and the finish is not as good as oxygen cutting. The main criteria for evaluating the quality of CNC plasma cutting are: the inclination of the cutting surface, the cutting depth of the cutting seam, and the amount of slag.

       If the manual adjustment method is adopted, the height of the cutting nozzle from the steel plate is controlled at 6-8 mm. Through a series of cutting tests, it can be proved that the cutting quality has been significantly improved. In addition, in order to improve the cutting quality, we have carried out a comprehensive cutting test, analyzed and sorted out the test data, and obtained some of the best working parameters of the CNC plasma cutting machine. Now it is organized as follows: CNC plasma cutting machine can cut various flat special-shaped parts, and has the advantages of fast cutting speed, high efficiency, good cutting surface quality, accurate cutting size, and small thermal deformation of the workpiece.

      The inclination of a high-quality cutting surface should be below 30, and the cutting depth should be O. Less than 15 mm, and less slag, easy to remove.

When the height of the cutting nozzle from the steel plate is controlled by the arc voltage height controller, because the dynamic positioning accuracy can reach ±0.013, it can ensure that the height of the cutting nozzle and the steel plate remains unchanged, so the inclination of the cutting surface is small. And even, and the finish is good. When adjusting the height of the cutting nozzle from the steel plate by hand, the steel plate to be cut should be placed as flat as possible to reduce the adjustment times of the cutting torch and ensure the stability of the cutting torch during the cutting process.