Comprehensively organize the knowledge of laser marking machine for your reference
The principle of laser marking processing:
1. Basic principles:
The laser light emitted by the laser undergoes a series of treatments. After focusing by the lens, the energy is concentrated in a small range, so that the surface material is instantly melted or even vaporized. By controlling the path of the laser on the surface of the material, the required image is formed. Text mark. According to different material properties (such as melting point, boiling point, temperature at which chemical changes occur), the workpiece will undergo a series of physical or chemical changes, such as melting, vaporization, oxide formation, discoloration, and so on. This is the principle of laser processing.
2. The recognized principle of laser marking machine:
Cold processing: photons with very high load energy can modify the material or the surrounding medium to cause the material to undergo non-thermal process damage. Because the low temperature is used, the thermal ablation temperature of the bottom of the box is lower, so there is no "thermal damage" side effect to achieve cold peeling, so there is no heating or thermal deformation on the inner layer and nearby areas of the processed surface, nor will it affect The workpiece causes problems such as burning, black edges, and deformation. Green laser marking machine and UV laser marking machine belong to cold processing.
Thermal processing: The surface of the workpiece is irradiated with a high-energy laser beam. The surface of the material absorbs laser energy and generates a thermal excitation process in the irradiated area, so that the temperature of the material surface (or coating) rises, causing metamorphosis, melting, ablation, evaporation, etc. . In order to achieve our final target effect, it is called thermal processing because high temperature is used to achieve the desired effect. Fiber laser marking machine, co2 laser marking machine, semiconductor laser marking machine belong to thermal processing.
Laser processing mode:
The focused laser is like a very thin invisible tool, which vaporizes the surface of the local area of the object point by point. It is characterized by non-contact processing and does not touch the workpiece. It can be marked on any special-shaped surface without producing Mechanical extrusion or mechanical stress does not change the physical properties of the processed article; due to the small size after laser focusing, the small heat-affected area and fine processing, some processes that cannot be achieved by conventional methods can be completed.
