Reasons for roughness of cutting section of CNC flame cutting machine
When controlling the CNC flame cutting machine, due to the influence of factors such as thermal deformation, there is often a deep mark on the head of the cut billet. As far as actual cutting is concerned, for many processing technologies that require high cutting accuracy, uneven closing marks cannot meet the cutting requirements. From the analysis of the cutting cross-section traces, it is mainly due to the influence of the CNC flame cutting machine equipment that the uneven closing is caused. Specifically, it is mainly caused by unreasonable cutting processing. To sum up, there are four main points: 1. The position of the cutting torch must be fixed at a reasonable height and vertically, and there must be no deviation from front to back, left or right. The CNC flame cutting machine cutting torch can automatically adjust the height to find the appropriate cutting height, which not only improves the service life of the cutting nozzle but also ensures cutting quality. 2. To adjust the flame, the flame of the cutting gun must be adjusted to the best. If it is too large or too small, it will affect the cutting surface of the slab. The CNC cutting machine instruction manual provided by the CNC cutting machine manufacturer has better flame adjustment. In just a few hours of instruction, you can master the basics of flame adjustment. 3. The mechanical components must be tightly coupled, and the gaps between the bearings and pin holes should not be too large. Because the cutting process is carried out simultaneously with the movement of the slab, the looseness of the mechanical components will cause the cutting gun to swing, thereby affecting the cutting effect. . 4. The swing and positioning control parts of the cutting gun in the billet casting machine cutting machine should not have a short sloping plate. The on-site sloping plate was appropriately lengthened by about 7cm, and the balance wheel was lengthened by about 2cm, which solved the problem of jitter caused by the movement of the cutting gun. Causes of cross-section roughness: 1. Is the drag amount too large after cutting the section? Phenomenon: The cutting grain of the cutting section is greatly offset backward, and at the same time, depressions of varying degrees appear with the amount of offset. reason: 1. Cutting speed is too fast; 2. The cutting nozzle used is too small, the cutting oxygen flow is too small, and the cutting oxygen pressure is too low; 3. The height between the cutting nozzle and the workpiece is too large. 4. Near the lower edge of the cutting section, the cutting grain advance is too large. Phenomenon: The cutting grain advance amount near the lower edge of the cutting section is too large. reason: 1. The cutting nozzle is blocked or damaged, and the wind line is blocked and deteriorated; 2. The cutting torch is not vertical or there is a problem with the cutting nozzle, causing the wind line to be incorrect or tilted. 3. In the upper half of the cutting section, the cutting grain advance appears. Phenomenon: A certain degree of cutting grain advance is formed near the upper edge. reason: 1. The cutting torch is not perpendicular to the cutting direction, and CNC flame cutting machine nozzle is blocked or damaged; 2. The wind line is blocked and deteriorates;
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