How does the plastic laser welding machine perform welding?

Plastic laser welding machine is a new type of welding method that uses high power. The surface can be heated to boiling point within microseconds, producing a large amount of evaporation. It is mainly used for welding thin-walled materials and precision parts, and can realize spot welding, butt welding, lap welding, sealing welding, etc. It has the advantages of small weld width, fast welding speed, smooth weld, accurate control, small focus, high positioning accuracy, and easy automation. So what is the welding method of the laser welding machine? Laisai laser welding engineers will take you to discuss.

When using a plastic laser welding machine, there are two different methods or modes to transfer energy from the laser to the welding material. According to the power, this is the power factor of the laser. In the weld area, the laser welding mode can be a guide mode or a keyhole mode. Users who have used a welder should already be familiar with this, as this is a keyhole pattern commonly used in manual welding.

The key difference between the two laser welding methods is the energy delivered to the metal. The conduction mode can be thought of as low energy density, and the keyhole mode contains higher energy density. But remember, energy density is the most influential mode.

And since energy density is the cross-sectional area of the weld that the power passes through, changing the weld ratio or dividing the power of the laser beam by the defined type will affect the type of weld. Conduction mode welding is basically a low energy density weld that heats the surface of the material to be welded, once the surface is heated, it conducts the heat deeper into the material.

Since this welding method is low energy density welding, the surface weld size is generally larger and the penetration depth is generally shallower. When moving from low energy density welding to high energy density welding, the mode changes from conduction mode to keyhole mode, again referring to the definition of energy density, which can be achieved most simply by reducing the weld size or increasing the laser beam power. Keyhole mode fusion welding is welded because the energy density delivered to the small hole or hole in the material is higher.

This hole is formed by the evaporated metal, and as the beam moves forward, the molten metal fills behind the beam from the surface to the bottom of the material. This is different from conduction mode. In conduction mode, only the surface is heated and it does not penetrate deep into the weld. The welding effect of the laser welding machine is well received by everyone. Laser welding can improve welding strength and high temperature resistance.

Plastic Laser Welding MachineThe quality of the welded workpiece is very high, and the uneven melting caused by heating is completely avoided, ensuring the quality of the product.