In circuit board soldering processing, two common soldering methods are reflow soldering and wave soldering. So in PCBA processing, what is the role of reflow soldering, what is the role of wave soldering, and what is the difference between them?
Firstly- Circuit board soldering: reflow
PCBA refers to the abbreviation of Printed Circuit Board + Assembly. That is to say, the bare circuit board goes through SMT loading, and then goes through the entire manufacturing process of DIP plug-in. We call them as PCBA. This is a common way of writing in China, and the standard way of writing in Europe and America is PCB’A, with ” ‘ ” added, people called it as the official idiom.
Heating melts the solder paste pre-coated on the pad to realize the electrical interconnection between the pins or solder ends of the electronic components.. The machine pre-mounted the components on to the pad and the pad on the pcb. So as to achieve the electrical interconnection of the electronic components the purpose of soldering on the circuit board. Reflow soldering: devided into preheating zone, heating zone and cooling zone. Reflow soldering process: printing solder paste>mounting components>reflow soldering>cleaning
Use a pump to spray the molten solder into a solder wave. And then pass the pins of the electronic components. The workers solder through the solder wave to realize the electrical interconnection between the electronic components and the circuit board. Spraying, preheating, tin furnace, and cooling are the four parts of wave soldering machine.
Second-Wave soldering process
(1) Wave soldering is where molten solder forms a peak of solder to solder the components; reflow soldering is where high-temperature hot air forms reflow and melted solder to solder the components.
(2) During reflow soldering, there is already solder before the pcb being applied to the furnace. After soldering, workers melt the solder paste for soldering. After that, we will do wave soldering, there is no solder before the pcb is applied to the furnace. Complete the soldering on the pads.
(3) Reflow soldering is suitable for chip electronic components, and wave soldering is suitable for pin electronic components.