A Brief Discussion on Laser Equipment Upgrade Design

06/15

2020

When laser welding different materials, the position of the laser beam plays a crucial role in determining the final weld quality—this is especially true for butt joints compared to lap joints. For example, when welding hardened steel gears onto low-carbon steel barrels, properly controlling the laser beam’s position helps produce a weld characterized primarily by low-carbon components that exhibit excellent crack resistance. In certain applications, the geometry of the workpieces to be welded requires a specific angle of laser beam deflection. When the angle between the beam axis and the joint plane is… 100 Within this range, the workpiece’s absorption of laser energy remains unaffected.

Welding speed has a significant impact on penetration depth. Laser equipment has been modified and upgraded; increasing the speed will result in shallower penetration. However, if the speed is too low, it can lead to excessive melting of the material and weld defects in the workpiece. Therefore, for a given material with a specific laser power and a certain thickness, there exists an optimal range of welding speeds. The cost of upgrading laser equipment—and the corresponding speed at which a desired penetration depth can be achieved—varies depending on the system. In laser welding processes, inert gases are typically used to protect the molten pool. When welding certain materials, surface oxidation may not need to be considered. However, for most applications, helium, nitrogen, and other gases are commonly employed for shielding purposes. Laser Equipment Upgrade After design, protect the workpiece from oxidation during the welding process.

Laser Equipment Upgrade

Principle of Plastic Laser Welding

Laser welding is a welding process that uses a high‑energy-density laser beam as the heat source: the laser radiation heats the surface of the workpiece, and the heat on the surface spreads inward via thermal conduction, causing the workpiece to melt and form a well‑defined molten pool. The laser beam passes through the upper transparent material and is then absorbed by the lower layer. After absorbing the laser energy, it is converted into thermal energy. Because the two layers are pressed together during the laser equipment modification and upgrade process, the thermal energy is transferred from the absorption layer to the transparent layer. On the optical layer, the two materials are melted and fused together.