Cutting speed range of portable CNC cutting machine

The cutting speed range of the portable CNC cutting machine can be selected according to the equipment description, or it can be determined through experiments. Due to the thickness of the material, the difference of the material, the height of the melting point, the thermal conductivity and the surface tension after melting, the cutting speed also changes.

When the cutting speed is too low, because the cutting place is the anode of the plasma arc, in order to maintain the arc itself, the anode freckles or anode area must be around the cutting seam closest to the arc Find a place to conduct the current, and at the same time, more heat will be transferred to the radial direction of the jet, so that the incision will be wider, and the molten material on both sides of the incision will be drawn out and solidified at the bottom edge, forming a slag that is difficult to clean, the incision The upper edge of the metal will be rounded due to excessive heating and melting.

It can be seen that a good cutting quality is inseparable from the cutting speed. At low speeds, the arc may even be extinguished because the notch is too wide.

The cutting range of the portable CNC cutting machine is mainly manifested in that a moderate increase in the cutting speed can improve the quality of the cut, that is, the cut is slightly narrower, the cut surface is smoother, and the deformation can be reduced; due to the fast cutting speed, the cutting line energy Lower than the required value; the jet in the incision cannot immediately blow away the molten cutting melt, resulting in a large amount of backward resistance, and accompanied by slag hanging in the incision, the surface quality of the incision is reduced.

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