There are many times customers have such a doubt: After using CNC plasma cutting machine processing plates, whether in the vertical section or the surface finish of the parts, compared with the CNC flame cutting machine there is a certain gap, which makes many users right The quality of plasma cutting raised doubts. In fact, if we analyze it carefully, it is not difficult to see why.
The cutting material of the flame cutting machine is less than the material of the plasma cutting machine. CNC flame cutting machine in cutting carbon plate, low alloy plate and other materials, the external surface of the parts of the attached amount of debris than, and very corporate employees will hit the parts after cutting to make the residue fall, thereby further improving the cross-section finish. Therefore, we will find that the cutting surface finish of the CNC plasma cutting machine is obviously inferior to the flame cutting machine. So, what factors in the production process will cause the cut surface finish to decrease? Sort out four reasons:
First, the cutting speed is abnormal.
Cutting speed is too fast or too slow will affect the smoothness of the cutting surface. Therefore, we must determine the cutting speed according to the material of the cutting plate. Don't be arbitrarily.
Second, abnormal gas flow We all know that the CNC plasma cutting machine blows off dregs through gas when cutting. If the gas flow rate is too small, the blowing force will easily produce dregs. Therefore, choosing the right gas flow plays an important role in ensuring the smoothness of the cutting surface.
Third, the anomaly of concentricity between the tungsten electrode and the nozzle During the cutting process, if the centering of the tungsten electrode and the nozzle is not good, the symmetry of the gas and the arc will be destroyed and the plasma arc will not be well compressed or arc generated. Blowing, cutting ability decreased. Therefore, the degree of concentricity between the tungsten electrode and the nozzle must be adjusted before cutting.
Fourth, plasma arc power anomalies In the above, we mentioned that if the centering of the tungsten electrode and the nozzle is not good, the symmetry of the gas and arc will be destroyed, and such cutting will also have obvious slag. Therefore, we can appropriately increase the power of the arc column, making it possible to use more air flow to enhance the air blowing force, which is very beneficial to eliminate incision hemangiomas.
Sometimes when we look at the problem, we can't just look at the surface. To analyze it in depth, we can find where the “root cause†is. When there is a big difference between our plasma cutting surface roughness and flame cutting, we can examine the reasons from the above four aspects.
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