Method to reduce cutting deformation of gantry CNC cutting machine

Generally speaking, in the case of the same thickness of the gantry CNC flame cutting machine, the parts with a larger shape have less deformation than the parts with a smaller shape. The cutting deformation of a workpiece with a small aspect ratio is smaller than that of a workpiece with a large aspect ratio; the cutting deformation of the workpiece near the middle of the steel plate is smaller than the deformation of the workpiece near the edge.

Excessive cutting deformation will cause the part size to be too large, affecting the subsequent influence on welding, and even scrapping. To this end, the following measures are taken to reduce cutting deformation and improve the dimensional accuracy of cutting parts.

In program design, choose a reasonable cutting sequence, direction and starting point. When cutting multiple workpieces, you should follow the principle of 'small workpieces, large workpieces, first cut the hole, and then cut the shape'.

When cutting, the cutting deformation trend of the part should be analyzed according to the shape of the part and the position on the steel plate, and the reasonable cutting starting point and cutting direction should be determined.

So, in the cutting process of the CNC gantry flame cutting machine, try to connect the last cutting edge of the part with the steel plate that is not easy to deform.

For some narrow, long, wide and narrow parts, the deformation can not be effectively controlled only from the cutting order when programming, and the intermittent cutting method should also be considered. That is, two or more temporary non-cutting points are set on the same edge of the part. These points connect the part and the steel plate during the cutting process. After the other parts are cut, these points are cut into one body. This can reduce the shrinkage and deformation of the parts in the length direction.

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