The laser has high brightness, good directionality and good monochromaticity. The first thing that comes to mind is that it can melt metal and cut steel. It is because of these characteristics that the laser head has another important purpose:
welding
original principle
Laser welding head is an efficient and precise welding method using a high energy density laser head beam as a heat source. Under the light irradiation of the laser head, the local temperature rises rapidly due to the absorption of light energy. When the power density is suitable, the metal in the partially irradiated part reaches the melting point but does not evaporate. After the molten metal cools and solidifies, the two pieces of material are welded together.
According to the type of laser head, laser welding head can be divided into YAG laser welding head, semiconductor laser welding head, fiber laser welding head and other types.
Among them, the working principle of the fiber laser welding head is:
The high-energy laser head beam is coupled into the optical fiber after long-distance transmission, collimated into parallel light by a collimating lens, and then focused on the workpiece for welding.
superior potential
Laser welding head welding is a non-contact processing method with no external forces on the welded parts.
The light energy of the laser head is highly concentrated and can rapidly heat and cool metals. For many components, thermal effects are negligible. It can be considered that no thermal deformation occurs, or thermal deformation is minimal.
Capable of welding high heat focus, refractory and difficult to weld metals such as Qin alloys, aluminum alloys, etc.
The picture shows the effect of welding on a metal welded joint.
The welding points and welding seams are neat and beautiful, and it is easy to cooperate with the computer numerical control system or the manipulator and robot to realize automatic welding, and the production efficiency is high. It is suitable for spot welding of various complex welds and various equipment.
