1. Cutting height and stability

2. Matching of cutting speed and working pressure.

Parts cut by CNC cutting machine can be directly welded and applied without machining. However, CNC plasma cutting machine is cut with plasma arc, compared with oxygen cutting. There are still some defects, which are mainly reflected in the large inclination of the cutting surface, and its smoothness 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 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, and a series of cutting tests can prove that the cutting quality has been significantly improved. In addition, in order to improve the cutting quality, we conducted a comprehensive cutting test, and analyzed and classified the test data, and obtained some optimal working parameters of the CNC plasma cutting machine. It is now described as follows: The CNC cutting machine can cut complex workpieces of various shapes, with the advantages of fast cutting speed, high efficiency, good cutting surface quality, accurate cutting size, and small thermal deformation of workpieces.

The slope of the high-quality cutting surface should be less than or equal to 30, and the cutting depth should be less than 15 mm, with less slag and easy to remove. When the cutting nozzle is controlled by the arc voltage height regulator, the dynamic positioning accuracy can reach ±0.013 Shan, so the height of the CNC plasma cutting machine cutting nozzle and the steel plate can remain unchanged, so the inclination of the cutting surface is small. It is uniform and has good finish. When the CNC plasma cutting machine manually adjusts the height of the cutting nozzle from the steel plate, the steel plate to be cut should be as horizontal as possible to reduce the number of adjustments to the cutting torch and ensure the stability of the cutting torch during cutting.