Laser soldering is indispensable for automotive wiring harnesses

With the development of modern technology, the car as a means of transportation has become quite common, wiring harness as an indispensable part of the car, the demand has naturally become higher. In recent years, compared with the traditional electric soldering iron process, laser soldering technology has risen rapidly. It is an indispensable part in the field of automotive wiring harness, because it plays a great role. Vehicle wiring harness is the main body of Internet operation of automobile lines, and there is no automobile circuit without wiring harness. With the improvement of the role of vehicles, the application of wiring harness is more and more widely. Wiring harness can be used in automobiles, electrical products, computers and communication equipment, as well as various electronic devices, instruments and equipment. The use of automotive wiring harness is more and more frequent, and the failure rate of its equipment is also increasing. How to achieve the stability and durability of automotive wiring harness has become a difficult problem faced by the automotive wiring harness machinery manufacturing industry. In recent years, laser welding technology of automobile wiring harness has also played a great role in some representative projects in China. At this stage, the traditional welding has long been unable to meet the increasingly high technical standards and requirements, so laser welding has a lot of room for development. It involves material science, structural mechanics, electronic information, computer science and other fields. Wiring harness terminal laser soldering solution: Laser soldering automotive wiring harness wiring and terminal connectors is different from electric iron automatic welding machine. In the specific production process, the electric iron automatic welding machine uses the electromagnetic induction heating of the heating core to heat the wires of the automobile wiring harness and the spot welding radiation source energy according to the heat conduction, which is very easy to burn the wires of the wiring harness and the plastics of the wiring harness terminals. Laser soldering uses a non-contact partial rapid heating method to weld when the energy is not fully delivered to the non-soldered area, which is highly efficient. In addition, the laser welding of the automobile wiring harness does not use an electric iron for welding, has no loss, and can avoid poor welding of the wiring harness caused by the damage of the welding head and the damage of the heating core. Because the laser soldering spot welding of the harness terminal is small and the heat discharge of the welding layer is fast, the laser soldering system software for temperature control of the automotive harness must be selected. At present, the laser temperature module has a temperature collection rate of one thousand times per second. The intelligent automatic control system and high frequency temperature acquisition and calculation can ensure the temperature accuracy of the whole welding harness terminal, and effectively solve the problems of temperature load and insufficient temperature of the harness terminal. The automobile wire harness terminal has a certain heat dissipation capacity. Usually, people will use laser to heat the wire harness terminal to a certain temperature (if the welding layer material of the wire harness terminal is different, the temperature will be different). At the same time, the tin bar is also heated and heated. Finally, the melted tin material covers the wire harness terminal and produces a firm spot welding. Heat the welded wire harness terminal to 350 °, so that the temperature of the welding rod is higher than 370 ° during the whole welding process. The laser temperature is higher than the heating temperature in the whole process of tin feeding. After the tin is fed, the spot welding should be continuously heated and insulated until the solder joint is full of tin. The heat dissipation of the whole process is relatively fast, so the temperature should be well controlled.

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