Laser cutting is the use of high-power density laser beam to irradiate the material to be cut, so that the material is quickly heated to vaporization temperature, and evaporates to form holes. As the beam moves on the material, the holes continuously form a narrow width (such as about 0.1mm). Seam to complete the cutting of the material. Laser cutting is one of the thermal cutting methods.
Compared with other thermal cutting methods, laser cutting is characterized by fast cutting speed and high quality. Good cutting quality: Due to the small laser spot, high energy density, and fast cutting speed, laser cutting can obtain better cutting quality. The cutting surface is smooth and beautiful, and the surface roughness is only tens of microns. Even laser cutting can be used as the last process without mechanical processing, and the parts can be used directly. After the material is laser cut, the width of the heat-affected zone is very small, and the performance of the material near the slit is almost unaffected. The deformation of the workpiece is small, the cutting accuracy is high, the geometric shape of the slit is good, and the cross-sectional shape of the slit is relatively regular. rectangle.
So, what is a laser cutting point? What are the methods for selecting laser cutting points? Today, Guohong Laser will tell you about the concept of laser cutting points and the method of selecting laser cutting points.
Analysis of the concept of laser cutting point and the method of selecting laser cutting point:
1. The concept of laser cutting point
The laser cutting puncture point is the starting point of laser cutting: when the laser cutting machine is used for sheet metal processing, the laser beam is cast on the metal sheet to form a pit, and the material forms a hole with the airflow. This is the so-called laser Cut the puncture point. The material continuously forms pits under the irradiation of the laser beam. When it absorbs heat and heats up to the boiling point, the material starts to excite to form holes. The laser beam uses this hole as a starting point for contour cutting.
2. The method of selecting laser cutting points
With the development of laser technology, the control software can automatically select the puncture point, but if the roughness of the cutting fracture is required, the cutting point of the laser cutting machine needs to be selected, and the puncture point needs to be manually adjusted during programming.
The laser beam emitted by the laser cutting machine penetrates the steel plate to enter the contour cutting, and its cutting speed rotates 90 degrees in the vector direction. The included angle is 0°. It will cause a relatively rough cutting surface to flow on the cut section of the processed material. Therefore, the choice of the cutting point (puncture point) is related to the smoothness of the rear surface of the material.
The selection of laser cutting points follows a principle: the walking direction of the laser beam is perpendicular to the tangent direction of the cut contour of the processed part. The operator should pay attention to the direction of the beam during cutting, and cut continuously without interruption. Do not jump directly from one place to another. In one location, it is easy to cause many small holes when the profile is cut, which affects the overall quality of the cutting process.
The above is the analysis of the concept of laser cutting point and the method of selecting laser cutting point. I hope to help you.
Guohong Laser, professional manufacturer of optical fiber laser cutting machine!
If you have any questions about fiber laser cutting machine, welcome to contact us.
Post time: Aug-17-2021