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What should be paid attention to when purchasing solder bars

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Update time : 2022-11-02 21:09:54
Different industries have different requirements for soldering. Some product industries must use solid tin wire, and some products must use rosin tin wire. Rosin can improve the fluidity of liquid solder and can also prevent the oxidation of the metal to be soldered and form an oxide film. 
Reasons for buying lead-free solder bars and solder bar welding Project explanation:
1. The specific gravity of the flux is too high or too low.
2. There is too much antioxidant oil in the tin furnace or it deteriorates.
3. The flux is in poor contact with the bottom surface; the angle between the bottom plate and the liquid surface of the solder strip is improper.
4. The preheating temperature is too high or too low; before soldering, the standard temperature is 75-100 degrees. (adjusted according to the actual situation)
5. The preheating temperature is too high or too low; the standard temperature is 245-265 degrees. When it is too low, the solder joint is sharp and shiny; when it is too high, the solder joint is slightly round and stubby.
6. The wave crest of the wave soldering furnace is unstable. There are impurities in the liquid solder bar in the tin furnace. The original bottom plate, the lead wire is not handled properly.
7. The speed of the conveyor belt is too slow or too fast. The standard speed is 1.2-1.8M/MIN. When it is too fast, the solder joint is sharp and shiny; when it is too slow, the solder joint is slightly round and stubby.
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