Focus Position And Difference Of Laser Cutting Machine.

Laser cutting is the use of focused high power density laser beam irradiate the workpiece, so that the material quickly heated to the gasification temperature, and evaporation to form holes. As the beam moves into the material, successive holes with narrow widths are formed to complete the cutting of the material.

During laser cutting, there is no contact between the torch and the workpiece and no tool wear. To process parts of different shapes, do not need to change the "tool", only need to change the output parameters of the laser. Laser cutting process has low noise, low vibration and no pollution. Compared with other thermal cutting methods, laser cutting is generally characterized by fast cutting speed and high quality.

Focus position and difference analysis of laser cutting machine:

Laser cutting can be divided into four categories: laser vaporization cutting, laser melting cutting, laser oxygen cutting, laser cutting and controlled fracture. Laser cutting is one of the thermal cutting methods. Laser cutting machine is a technical revolution of sheet metal processing, is the "processing center" in sheet metal processing. Laser cutting machine has a high degree of flexibility, cutting speed, high production efficiency, and the product production cycle is short, won a wide range of markets.

1. The focus position of the laser cutting machine is on the workpiece surface.
This is the most common focus position, also known as 0 focal length. When in use, let the laser cutting machine focus close to the workpiece surface. In this focus position, because of the slight difference in the smoothness of the upper and lower surfaces of the workpiece, the cutting surface near the focus side will be smooth, on the contrary, the cutting surface far from the focus side will be rough. In practice, often according to the upper and lower surface of the different process requirements to determine.

2. The focus position of the laser cutting machine is inside the workpiece.
The focus position in the workpiece is called the focal length, in the cutting stainless steel or aluminum steel plate and other materials are generally used in the focusing way, so that the cutting focus is located in the workpiece. The main disadvantage is that the cutting range is relatively large, and this mode tends to require stronger cutting airflow, adequate temperature, and longer cutting and punching times. Therefore, it is only used when cutting hard materials such as stainless steel or aluminum.

3. The focus position of the laser cutting machine is on the workpiece.
The focal point on the workpiece is called negative focal length because the location of the cutting point is neither on the surface nor inside the workpiece, but above the cutting material. The focus is on the workpiece because the thickness of the plate is relatively high. If the focus is not positioned in this way, insufficient oxygen may be delivered by the nozzle, causing the cutting temperature to drop and preventing the material from being cut. But there is a significant disadvantage is the rough cutting surface, not suitable for precision cutting.

Above is the laser cutting machine focus position and difference analysis. In the process of using laser cutting machine, different focusing modes can be selected according to the processing needs of different workpieces, which can not only give full play to the performance advantages of laser cutting machine, but also ensure the cutting effect.