Laser cutting machine high quality cutting parameters
Anyone who has used a laser cutting machine knows that the laser cutting effect is controlled by cutting parameters such as auxiliary pressure, laser power, cutting speed, and focus position. The parameters are accurate to ensure high-quality cutting. How do these parameters directly affect laser cutting? The effect is.
1, the influence of auxiliary pressure
In the laser cutting process, the auxiliary air pressure can blow off the slag during cutting and cool the heat affected zone of the cutting. The auxiliary gases include oxygen, compressed air, nitrogen, and inert gases. For some metallic materials and non-metallic materials, inert gas or compressed air is generally used to prevent the material from burning. Such as the cutting of aluminum alloy materials. Active gas (such as oxygen) is used for most metal materials because oxygen can oxidize the metal surface and improve cutting efficiency. When the auxiliary air pressure is too high, eddy current appears on the surface of the material, weakening the ability to remove the melt, resulting in widening of the slit and rough cutting surface; when the air pressure is too low, the molten material cannot be completely blown away, and the lower surface of the material will adhere to the surface. Slag. Therefore, the auxiliary gas pressure should be adjusted during cutting to obtain the best cutting quality.
2, the impact of laser power
The amount of laser power has a considerable impact on cutting speed, slit width, cutting thickness and cutting quality. The amount of power required is based on the characteristics of the material and the mechanism of the cut. For example, materials with good thermal conductivity and high melting point and high reflectivity on the cut surface require large laser power. Generally, under certain other conditions, there is a laser power in the laser cutting process that obtains the best cutting quality. Further reduction or increase in power will result in slag or over-burning, resulting in a decrease in processing quality.
In addition, as the discharge voltage increases, the intensity of the laser increases as the input peak power increases, so that the diameter of the spot increases and the width of the slit increases accordingly. As the pulse width increases, the average power of the laser increases. Increase, the width of the laser slit is increased; usually, as the pulse frequency increases, the slit will also widen. When the frequency exceeds a certain value, the slit width will decrease.