Tin bars weld high-quality printed boards, the most important thing is the setting of technical parameters, and how to make these technical parameters reach the best value. Make the solder joints free from missing soldering, virtual soldering, bridging, pinholes, air bubbles, cracks, hanging tin, and sharpening. The setting parameters should be tested and analyzed to find out a set of optimal parameters and record them. When encountering similar input conditions in the future, you can directly set the set of mature parameters without further experiments. Flux flow control: Set reasonable parameters through experiments. The components are general through-hole devices, and the flow rate is 1.8L/H. Control of inclination angle: The inclination angle is the distance between the horizontal surface of the wave crest and the printed board at the wave crest. The included angle, the adjustment range is strictly controlled within 6-10°.

Wave soldering furnace temperature and time control

The wave soldering dwell time is the time it takes for a solder joint on the PCB to leave the wave surface from touching the wave surface. The calculation method of dwell/welding time is: dwell/welding time=wave width/speed. For different wave soldering machines, due to the different width of the wave surface, the transmission speed of the printed board must be adjusted to make the soldering time greater than 2.5 seconds. Generally, you can refer to the following relationship curve. In actual production, often only the appearance quality and defect rate of solder joints can be evaluated, and its welding strength and electrical conductivity are unknown, which is why "false welding" comes from this.