Industry information

Copper has become one of the most important metals in modern times for its high electrical conductivity and high thermal conductivity. Copper is widely used in various industries, applications, and sheet thickness. A large number of applications mean a high demand for copper connection solutions. Welding is a solution to achieve high electrical conductivity and high thermal conductivity in joints, but at the same time, high thermal conductivity will bring difficulties to the welding process. Let's take a look at the laser welding copper material is prone to what problems.
Laser beam welding of copper, especially with a relatively high plate thickness and a relatively low welding speed, is very challenging and is likely to cause serious welding defects. The automatic laser welding machine technology has the advantages of high energy density, less molten metal, narrow thermal influence area, high welding quality and high production power. Can be used to improve the production capacity of copper welding, has been gradually selected by more and more industries. However, due to the low absorption rate of fiber laser with high reverse data, it is difficult to process, and there are higher requirements for laser light source.
Laser welding technology is prone to the following problems:
1. The high reflectivity of copper products makes it difficult for laser to gather and heat copper. In principle, this is due to the high reflectivity of copper. Therefore, in the general laser welding machine welding copper material products, usually adopts the method of increasing the laser power to overcome the problem of material reflection, to ensure that there is enough material to transfer to the copper, will provide the temperature of the copper material, which reduces the reflectivity of the copper material.
2. It is difficult to mix and variability. Due to the large thermal conductivity of copper, the heat transfer speed will be fast during welding, and the thermal influence area of all welding parts is also large, so it is difficult to mix data together. Moreover, due to the large expansion coefficient of copper, improper clamp strength will lead to data deformation.
3. Stomata are prone to appear. Another important problem occurs when copper welding is the pores, especially when deep melt welding is more serious. There are two main cases of pores, one is the diffusion pores directly caused by hydrogen dissolution in copper, the other is the reaction pores caused by redox reaction.
Above is the laser welding copper material is prone to problems. Welding of copper material is a more difficult process, and micro-copper welding makes the processing more difficult. Laser welding is a practical technology to realize the joint process of copper material, it adopts the non-contact processing method, welding accuracy is high, very suitable for automatic processing process, because of the thermal conductivity of copper is too good and other reasons, it is very difficult to weld, so in the process must pay attention to the use.