The automotive wiring harness is the network body of the automotive circuit, and there is no automotive circuit without the wiring harness. With the increase in the functions of automobiles, wiring harnesses are widely used and can be used in automobiles, household appliances, computer and communication equipment, various electronic instruments, etc.
"Automotive-grade electronic components" referred to as automotive electronics, refers to the general term of all electronic equipment installed in automobiles. It is a system of electronic components that sense, calculate, and perform various states and functions of a car. Cars can be divided into four types: connectors, sensors, controllers, and actuators.
In recent years, welding technology has played an important role in some landmark projects completed by China's automotive electronics, but the traditional welding technology has been unable to meet the higher and higher technical requirements and conditions, so laser welding has a lot of room for development. Laser technology involves materials science, mechanics, computer science, etc.
The laser welding process is different from automatic soldering iron welding for automotive wiring harness wires and terminal joints. The soldering iron welding machine uses the electromagnetic heating of the heating core to transmit heat energy radiation to the wires and solder joints through heat conduction, so it is easy to burn the plastic of the wires and terminals in the actual production process.
Laser welding uses non-contact local rapid heating, and the welding is completed when the heat energy is not completely transferred to the unwelded area, which has the characteristics of high efficiency. In addition, laser welding does not require the consumption of soldering iron tips, nor does it require contact welding, which completely avoids poor welding caused by welding head wear and heating core damage.
Since the automotive terminals have a certain amount of heat dissipation, we usually use a laser to preheat the wire harness terminals to a certain temperature (the pad material of the wire harness terminals is different, the temperature will be deviated), the synchronous tin wire will also be preheated and heated, and finally the molten tin material will cover the wire harness terminals to form a stable solder joint. Preheat the soldered terminals to 350. During the tin feeding process, the temperature of the laser is higher than the preheating temperature, such as 370. During the tin feeding process, the temperature of the laser is greater than the preheating temperature. After the solder is fed, the solder joints should continue to be heated and insulated until the solder joints are covered.
To sum up, the laser soldering process has important application value in automotive electronic wiring harness welding. Its fast, precise and high-quality welding results bring higher production efficiency and product quality to the automotive manufacturing industry. With the continuous progress of technology and the continuous reduction of costs, it is believed that the laser soldering process will play an increasingly important role in the future of automotive electronic wiring harness welding.