Reflow soldering&Wave Soldering

The functions and differences between reflow soldering and wave soldering

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I'm curious to ask you a question, do you often confuse wave soldering and reflow soldering, and don't know which equipment is used for SMT and which equipment is used for DIP?

I often confuse wave soldering & reflow soldering!

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In the PCBA industry, reflow soldering and wave soldering are both production process equipment used to solder electronic product components to PCB.?They both use tin to solder components and PCB together. The production of electronic and electrical products is inseparable from these two process equipments. So what are the specific functions and differences between them?

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1. The function and process of reflow soldering

Reflow soldering refers to the electrical interconnection of the pins or soldering terminals of electronic components pre-mounted on the pads with the pads on the PCB by heating and melting the solder paste pre-coated on the pads, so as to achieve the electrical interconnection of the electronic components. The purpose of welding components on the PCB board. Reflow soldering is generally divided into preheating zone, heating zone, soldering zone and cooling zone.

Reflow soldering process: printing solder paste > mounting components > reflow soldering > cleaning.

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2. The function and process of wave soldering

Fully automatic wave soldering machine

Wave soldering uses a pump to spray molten solder into a solder wave, and then passes the pins of the electronic components to be soldered through the solder wave to achieve electrical interconnection between the electronic components and the PCB. A wave soldering machine is divided into four parts: spray, preheating, tin furnace and cooling.

Wave soldering process: Plug-in>Apply flux>Preheat>Wave soldering>Cut off corners>Inspection.

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3. The difference between reflow soldering and wave soldering

1)Wave soldering is when molten solder forms a solder wave to solder components; reflow soldering is when high-temperature hot air forms reflow molten solder to solder components.

2)During reflow soldering, there is already solder before the PCB is put in the furnace. After soldering, the coated solder paste is melted and soldered. During wave soldering, there is no solder before the PCB is put in the furnace. The solder wave generated by the soldering machine coats the solder on the PCB. Soldering is completed on the pads that need to be soldered.

3)Reflow soldering is suitable for chip electronic components, and wave soldering is suitable for pin electronic components.