How many welding methods are there for laser welding machine? With the rapid development of China's industry, welding is an indispensable production and processing process for industrial production. Technology has experienced several technological revolutions since its inception. Laser welding machine is a new welding method, which uses high power density. In the microsecond time range, the surface layer can be heated to the boiling point, resulting in a large amount of vaporization. Mainly for the welding of thin-walled materials and precision parts, it can realize spot welding, butt welding, lap welding, seal welding, etc. It has the advantages of small weld width, fast welding speed, small focus, high positioning accuracy, smooth weld, accurate control, easy automation and so on. What is the welding method of laser welding machine?
When using a laser welder, there are two different methods or modes to transfer energy from the laser to the welding material. According to the power density, this is the power factor of the laser. In the welding area, the laser welding mode can be conduction mode or keyhole mode.
It should be emphasized that the type of welding mode is determined by the amount of power transferred to the substrate and the nature of the material to be welded. The main difference between the two laser welding methods is the energy transferred to the metal. You can think of the conduction mode as a low energy density, while the keyhole mode contains a higher energy density. But remember, energy density is the most influential mode.
And because the energy density is the cross-sectional area of the weld through which the power source passes, changing the welding proportion or dividing the power of the laser beam by the defined type will affect the welding mode. Conduction mode welding is basically heating the weld with low energy density on the surface of the material to be welded. Once the surface is heated, it will conduct heat deeper to the material.
Because this welding mode is low energy density welding, the weld size on the surface is usually large, and the penetration depth of the weld is usually shallow. When you move from low-energy density welding to high-energy density welding, the mode changes from conduction mode to keyhole mode. Again, the definition of energy density can be achieved by reducing the weld size or increasing the laser beam power. In the simplest way, because the energy density of small holes or holes transferred to the material is higher, small hole mode fusion welding is welded.
The hole is formed by evaporated metal, which moves forward with the beam, and the molten metal fills behind the beam, reaching the actual molten part from the surface of the material to the bottom. This is different from the conduction mode, in which only the surface is heated and therefore does not penetrate into the depth of the weld. The welding effect of laser welding machine is loved by everyone. Laser welding can improve welding strength and high temperature resistance.
The quality of the workpiece welded by the laser welding machine is very high, which completely avoids the problem of uneven melting caused by heating, and ensures the quality of the product.
