Control of current and speed during operation of CNC plasma cutting machine

The choice of the process parameters of the CNC plasma cutting machine is crucial to the cutting effect of cutting quality, cutting speed and efficiency. Proper use of CNC plasma machines for high-quality rapid cutting requires a deep understanding and mastery of cutting process parameters.

Cutting current: It is the most important cutting process parameter, which directly determines the thickness and speed of cutting.

1. The cutting current increases, the arc energy increases, the cutting ability increases, and the cutting speed increases accordingly;

2. The cutting current increases, the arc diameter increases, and the arc becomes thicker to make the slit widen;

3. If the cutting current is too large, the nozzle heat load will increase, the nozzle will be damaged prematurely, and the cutting quality will naturally drop, and even the normal cutting cannot be performed. Therefore, the cutting current and the corresponding nozzle should be correctly selected according to the thickness of the material before cutting.

Cutting speed: The cutting speed range can be selected according to the equipment description or determined by experiment. Due to the thickness of the material, the material, the melting point, the thermal conductivity and the surface tension after melting, the cutting speed also changes accordingly. main performance:

1. Moderately improving the cutting speed can improve the quality of the incision, that is, the slit is slightly narrowed, the surface of the incision is flatter, and the deformation can be reduced. 2. The cutting speed is too fast, so that the cutting line energy is lower than the required amount. The jet in the slit cannot quickly blow off the melted cutting melt to form a large rear drag, accompanied by the slit slag, the slit The surface quality is degraded. 3. When the cutting speed is too low, since the cutting point is the anode of the plasma arc, in order to maintain the stability of the arc itself, the anode spot or the anode region must find a place of conduction current near the slit near the arc, and at the same time, it will flow toward the jet. More heat is transferred radially, so that the slit is widened, and the molten material on both sides of the slit gathers and solidifies at the bottom edge, forming a dross that is difficult to clean, and the upper edge of the slit is rounded due to excessive melting by heating. 4. When the speed is extremely low, the arc will even go out because the slit is too wide. It can be seen that good cutting quality and cutting speed are inseparable.

Wuhan Fire Safety Cutting Machine Co., Ltd. is mainly engaged in research and development of various types of CNC metal cutting equipment. The main products are: high-precision metal laser cutting machine, CNC fiber laser cutting machine, high-speed precision plasma cutting machine, CNC laser plasma cutting machine, CNC metal plate tube dual-use plasma cutting machine, CNC gantry plasma flame cutting machine, CNC plasma drill Cut one machine. The product has obtained a number of invention patents and utility model patents. Over the years, it has cooperated with many famous universities in Wuhan, which has greatly improved the company's product research and development strength, cutting process research ability and product quality. Products are widely used in metal processing, machinery manufacturing, shipbuilding, engineering machinery, mining machinery, locomotive manufacturing, chassis cabinets, ventilation and refrigeration and elevators, steel structure, lighting, advertising and other industries.