The wave soldering machine is mainly composed of a conveyor belt, a heater, a tin bath, a pump, and a flux foaming (or spraying) device. It is mainly divided into flux adding area, preheating area and soldering area. The solder in the tin bath gradually melts under the heating of the heater. The molten liquid solder forms a solder wave of a specific shape on the surface of the solder tank under the action of a mechanical pump or an electromagnetic pump. The PCB with the components mounted is placed on the transfer device. After a certain angle and penetration depth, the solder joints are soldered by the solder wave, so it is called wave soldering.
The working principle and function of double wave soldering
Two solder waves of dual wave soldering relay solder the PCB so that THT components can be reliably soldered to the top of the PCB and SMT components in one step. Dual wave soldering is usually a faster and more cost-effective method for handling large numbers of soldered parts, other important process parameters for dual wave soldering include the immersion depth of the PCB, the soldering angle of the soldering wave soldering machine, in addition to the soldering temperature, Welding time and wave type.
What is the difference between single wave soldering and dual wave soldering? What are the pros and cons?
The working principle of single-wave soldering and double-wave soldering is actually the same, but there is one more wave in double-wave soldering to reduce the leakage rate. For single-wave wave soldering, there is only one wave, called flat wave. Double wave soldering, the first wave is called interference wave, and the second wave is called flat wave.
Wave interference effect: The solder passes through the slit at high speed, thereby penetrating the narrow gap. The injection direction is the same as the board. For non-through-hole SMT components, the interference wave can complete the soldering, but for through-hole components, the interference wave itself is not suitable for soldering components, leaving uneven and redundant solder on the solder joints, so the second wave-flat wave is required.
Smoothing function: Eliminate the interference waves generated by burrs and welding bridges.
The main fault types of double wave soldering
1 Missing welding, virtual welding, continuous welding
2 The solder joints are too bright or the solder joints are not bright, the tinning is not good, and the solder joints are not full
3 splashes, tin beads
4 FLUX foaming is not good
5 big smoke, big taste
Double wave soldering brand manufacturers
Shenzhen Chengyuan Industrial Automation has been focusing on wave soldering, coating machines, and reflow soldering for more than ten years. It is an excellent choice for your company
Post time: May-22-2023