What is wave soldering

Wave soldering refers to the melting of soft brazing material (lead-tin alloy), through the electric pump or electromagnetic pump jet into the design requirements of the solder crest, can also be formed by injecting nitrogen into the solder pool, so that the printed board pre-equipped with components through the solder crest, to achieve the mechanical and electrical connection between the component welding end or pin and the printed board welding pad.

Wave soldering process: Insert the component into the corresponding component hole → pre-apply flux → preheat (temperature 90-100℃, length 1-1.2m) → Wave soldering (220-240℃) cooling → remove excess pin → Check.

Wave soldering with the enhancement of people's awareness of environmental protection has a new welding process. In the past, tin-lead alloy was used, but lead is a heavy metal that has great harm to the human body. Therefore, the lead-free process is promoted, the use of * tin silver copper alloy * and special flux, and the welding temperature requires higher preheating temperature.

In most of the products that do not require miniaturization and high power are still using perforated (TH) or mixed technology circuit boards, such as televisions, home audio and video equipment and digital set-top boxes, are still using perforated components, so the need for wave soldering. From a process point of view, wave soldering machines can only provide a few of the most basic equipment operating parameters adjustment.