Causes of hot deformation of steel plate caused by CNC gas cutting machine

Many customers have reacted to the use of numerical control gas cutting machine cutting steel plate, there will be thermal deformation, cutting steel plate is wasted, simply can not be used. This is closely related to the working principle of the CNC gas cutting machine for steel plate. Most of the NC cutting machines now use trajectory to carry out cutting. Before cutting, the plate should be placed on the cutting table, and then start gas cutting. When cutting, the temperature of the entry point of the cutting torch is much higher than that of other parts of the plate. This can easily lead to thermal deformation.

When the area of cutting plate is relatively large, the cutting speed is too fast, the parts to be processed are not large, the parts just cut have not come and thermal expansion, it is easy to produce thermal deformation, and then the parts to be cut gradually increase, then the heat has been increasing, the plate has been heating up, the thermal expansion of the energy is more and more The more.

The thermal deformation mentioned above is mainly caused by the cutting method of the operator of steel plate CNC gas cutting machine. Theoretically, the phenomenon of thermal deformation can not be completely eliminated, but we can avoid this phenomenon by other means.

1. Do some preparatory work before cutting the sheet metal, such as modifying the slot compensation of cutting parameters, so that the cutting trajectory can be better controlled so that it does not deviate, so that the volume of the cutting parts will be reduced correspondingly after cooling, the size will be normal, and the phenomenon of thermal expansion can be reduced a lot.

2. From the aspect of cutting methods, some measures can be taken, such as setting the direction of cutting leads upward, and the best choice of large sheet metal, and as far as possible to control the number of seconds before the end of cutting the last cutting point on the edge of the sheet metal position, this can also be very good to reduce the steel plate CNC gas cutting machine produces hot deformation.