The main difference between spot welding head and welding head is: Spot welding is actually a kind of electric welding. The object to be welded is dissolved on another object to be welded in contact with the object to be welded by the instant high temperature of the current, and then welded together. The electric soldering iron is a hand-soldering tool, and the soldering iron tip is heated to a temperature above 300℃ to be able to perform soldering well. When selecting spot welding heads, you can also choose from these aspects: 1.Select the spot welding head data and spot welding head type mainly based on the welding wire data and the melting point of the pad data. 2.According to the requirements of the soldering joints, select the contact area of the discharge part of the spot welding head with the weldment. Large welding wires require a large contact area. 3.Select the shape of the discharge part according to the welding wire data and welding data. 4.Set the shape of the current collecting part of the welding head according to the principle of better discharge.

In recent years, with the increasingly fierce competition in the consumer electronics markets, the electronic product manufacturing industry has also put forward higher requirements for products. Traditional processing methods easily lead to unstable product quality, parts melting, difficulty in forming normal nuggets, and low yield. The emergence of laser processing technology can quickly solve these problems for electronic product manufacturers. In the production process of high-end electronic products, laser processing plays an important role in the volume optimization and quality improvement if of products, making the products lighter, thinner and more stable. It is reported that about 70% of the processing and manufacturing links of electronic products are applied to laser technology ( more than 20 different processes) and related manufacturing equipment. At present, laser precision spot welding head is mainly used the shell of electronic products, shielding case, USB interface, conductive patch, etc, with small thermal deformation, precise and controllable action area and position, high welding quality, it can realize welding of heterogeneous materials, and is easy to realize automation and other advantages, However, when welding different materials, different welding methods need to be adopted. Based on the results of many experiments, Chuangxin Laser Welding Engineers summarized in the manufacturing process of consumer electronics, which method should be used for laser precision spot welding of different materials such as high-reflective materials, metal sheets, and dissimilar material. Get a better welding effect.

There are two shapes of precision spot welding tips: sector and conical. The conical shape can imporve the rigidity of the bumps  and prevent premature crushing when the electrode pressure is high; It can be also reduce the splash caused by excessive current density. But sector shape bumps are usually used. In order to prevent the extruded metal from remaining around the bumps and forming gaps between the plates, bumps with annular overflow grooves are sometimes used. In multi-point projection welding, the inconsistent height of the bumps will cause the imbalance of the current at each point and make the joint strength unstable. Therefore, the height error of the bump should not exceed ±0.12mm. If the preheat current is used, the error can be increased.