Measures to reduce cutting deformation of CNC cutting machine

Generally speaking, when the thickness of the gantry type CNC cutting machine is the same, the parts placed in the middle of the plate have less cutting deformation than the parts placed on the edge of the plate; the deformation of the large-shaped parts is smaller than the deformation of the small-shaped parts. The deformation of a part with a small cutting time ratio is less than that of a part with a large length-to-width ratio.

The cutting deformation is large, which will cause the size of the parts to become smaller, affect the subsequent assembly and welding, and even cause scrap. In order to reduce cutting deformation and improve the dimensional accuracy of cutting parts, the following measures can be taken.

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.

In the program design, choose a reasonable cutting direction, cutting sequence, and starting point. When cutting and blanking multiple workpieces, follow the principle of 'hole first, shape first, small workpiece followed by large workpiece'.

In gantry CNC machining, it is necessary to connect the last side of the part with the non-deformable steel plate as much as possible.

For some narrow, wide, and narrow strip parts, the deformation can not be effectively controlled only from the cutting order during programming, and the method of intermittent cutting must 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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