Laser tin welding process is applied to automotive electronic wire welding

　　The car wire beam is the network main body of the automotive circuit, and there is no car circuit without wire beams. With the increase of automotive functions, wire beam applications are very wide, and can be used for cars, household appliances, computers and communication equipment, various electronic instruments and instruments.

　　"Auto -level electronic component" referred to as automobile electronics refers to the general term for all electronic equipment installed on the car. It is a system composed of electronic components for various states and functions of perception, computing and execution of cars. Cars can be divided into four types: connectors, sensors, controllers and actuators.

　　In recent years, from some iconic projects completed by automotive electronics in my country, welding technology has played an important role, but traditional welding technology can no longer meet the higher and higher technical requirements and conditions. Therefore, laser welding has a lot of room for development space. Essence Laser technology involves material science, mechanics, computer science, etc.

　　Auto electronic wire beam picture

　　The laser tin welding process welding car lines and terminal joints are different from the automatic soldering iron welding. The soldering iron welding machine uses the electromagnetic heating of the heating core to transmit thermal radiation to the wires and solder joints through the thermal conductivity, so it is easy to burn the plastic of the wire and terminal in the actual production process.

　　Laser welding uses non -contact local rapid heating, and welding is completed when the thermal energy is not completely transmitted to the area without welding, which is highly efficient. In addition, laser welding does not need to consume the soldering iron head, without contact with welding, which completely avoids poor welding caused by the problem of welding head wear and heating core damage.

　　In the process of laser tin welding, due to the small welding joints and fast pads, the temperature control the laser tin welding system must be used. At present, the minimum measurement of 0.25mm of the Songsheng Optoelectronics Laser temperature control module is used. ≤40 μs, strong anti -interference ability, no need to cool the ambient temperature to resist 65 ° C. It can avoid defects of temperature overload and insufficient temperature.

　　Because the car terminals have a certain heat dissipation, generally we use laser to preheat the wire beam terminal to a certain temperature (the beam terminal pad material is different, the temperature will be deviated). The material covers the wiring terminal to form a solid welding joint. Preheat the welded terminal to 350. During the process of sending tin, the temperature of the laser is higher than the preheating temperature, such as 370. The temperature of the laser during the sending tin is greater than the preheating temperature. After the tin is delivered, the welded joints should be continuously heated until the tin is covered with welded joints. During this process, heat dissipation is the fastest to control the temperature.

　　The precision laser welding system of Songsheng Optoelectronics can be controlled by two modes of temperature and power at the same time, and can also be controlled by segmented hybrid mode. The unique temperature feedback function, the temperature control feedback system that has been deeply cultivated by the industry for many years, through real -time monitoring and feedback of the temperature at the welding point, it can ensure that the temperature value of the welding joint can be set at the set temperature, which will not cause burning at the welding joint. The measurement range is 100-600 degrees, which can effectively avoid temperature over loading.