In the laser spray tin welding system, the tin balls are transported from the tin ball box to the solder ball jet nozzle. After being heated and melted by the laser, they are sprayed from the special solder ball jet nozzle and directly cover the pad without additional flux or other tools. Solder ball spray welding is adopted, with high welding precision, and there are requirements for temperature or soft board connection welding area. During the whole process, the solder joints are not in contact with the main body of the soldering, which solves the electrostatic threat caused by the contact during the soldering process.
The laser spray tin welding system has the following characteristics:
1. The laser processing precision is high, the spot is small, the processing time is controlled by the program, and the precision is higher than that of the traditional process.
2. Non-contact processing, no contact with static electricity caused by welding, can be processed in parts that are not easy to be welded by conventional methods.
3. The small laser beam replaces the soldering iron head, which is also easy to process when there are other interference objects on the surface of the workpiece
4. Local heating, small heat affected zone; no static threat.
5. Laser is a clean processing method, easy to maintain and easy to operate. Repeated operation stability is good.
6. Six-axis working platform, equipped with synchronous CCD positioning and monitoring system, automatic clamping, automatic judgment of whether there is a workpiece, can ensure welding accuracy and yield.
7. The laser spray tin welding system does not need flux and other tools, which ensures the cleanliness of processing.
8. The heating speed is fast and the positioning is accurate, which can be completed within 0.2 seconds.
9. The diameter of the solder ball can be as small as 50μm, which is suitable for high-precision soldering.
10. The yield of solder is higher than that of ordinary automatic soldering machines.
11. With a visual positioning system, it is suitable for assembly line production.