‌The mainly reasons why the laser marking machine burns or melts on the surface of the material

‌1. Excessive energy density: Excessive energy density of the laser marking machine will cause the surface of the material to absorb too much laser energy, thereby generating high temperature, causing the surface of the material to burn or melt.

‌2. Improper focus: If the laser beam is not focused properly, the spot is too large or too small, which will affect the distribution of energy, resulting in excessive local energy, causing the surface of the material to burn or melt.

‌3. Too fast processing speed: During the laser marking process, if the processing speed is too fast, the interaction time between the laser and the material is shortened, which may cause the energy to be unable to be effectively dispersed, causing the surface of the material to burn or melt.

‌4. Material properties: Different materials have different thermal conductivity and melting points, and their absorption capacity for lasers is also different. Some materials have a high absorption rate for lasers and are prone to absorb a large amount of energy in a short period of time, causing the surface to burn or melt.

‌The solutions to these problems include:

‌1. Adjust the energy density: By adjusting the output power and spot size of the laser marking machine, control the energy density within a suitable range to avoid excessive or low energy input.

‌2. Optimize focus: Ensure that the laser beam is correctly focused and the spot size is moderate to evenly distribute the energy and reduce local high temperature.

‌3. Adjust the processing speed: According to the characteristics of the material and the processing requirements, set the processing speed reasonably to ensure that the laser and the material have enough time for heat exchange and energy dispersion.

‌4. Choose the right material: For specific applications, choose materials with low laser absorption, or pre-treat the material, such as coating, to reduce the risk of burning or melting.

The above methods can effectively solve the problem of laser marking machine burning or melting on the material surface, ensuring processing quality and efficiency.