You must pay attention to these two skills of the hand-held laser welding machine!

The hand-held laser welding machine is the mainstream metal material welding equipment at present, and more and more factories begin to purchase a large number of hand-held laser welding machines for use. However, although the equipment itself has very good performance, these two points must be paid attention to when using the hand-held laser welding machine. What are the two points? Let’s have a look!

These two points must be noted when using the hand-held laser welding machine:

1、pulse waveform

Pulse waveform is a key problem in hand-held laser welding machine, especially in laser sheet welding; When the low intensity light beam reaches the material surface, some energy on the metal surface will be dispersed and lost, and the reflection coefficient will change with the change of the surface temperature. During the pulse period, the reflectivity of the metal changes greatly, and the pulse width is one of the key parameters of laser welding.

2、power density

Power density is another key parameter in laser welding. Under high power density, the material surface can reach the boiling point within microseconds, causing a lot of melting. High power density is conducive to the removal of materials, such as drilling, segmentation and engraving. For high power density, the surface temperature can reach the boiling point in milliseconds; After the surface is melted by the hand-held laser welding machine, the bottom layer reaches the melting point to form a good fusion welding. Therefore, in the insulator laser welding, the power density is 104~106Wcm2. The power density at the center of the laser spot is too low to evaporate into holes. On the plane near the laser focus, the power density is relatively symmetrical. There are two defocusing modes: positive defocusing and negative defocusing.

The above are the main points that must be paid attention to when using the hand-held laser welding machine. Generally, we must debug and confirm these two points before use. Formal processing can only be carried out after debugging and ensuring that there is no error.