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Time of issue:2020-07-15 00:00:00
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SMT chip wave soldering and inspection of the first part

(Summary description)We know that the main production process of PCBA includes: solder paste printing, SMT patch, reflow soldering, DIP plug-in, wave soldering. So what is the first piece of wave soldering? The workflow is roughly as follows:
1. Use an automatic board loading machine or manually place the PCB on the conveyor belt (or fixture). The machine automatically completes the operations of spraying flux, drying, preheating, wave soldering, and cooling...

SMT chip wave soldering and inspection of the first part

(Summary description)We know that the main production process of PCBA includes: solder paste printing, SMT patch, reflow soldering, DIP plug-in, wave soldering. So what is the first piece of wave soldering? The workflow is roughly as follows:
1. Use an automatic board loading machine or manually place the PCB on the conveyor belt (or fixture). The machine automatically completes the operations of spraying flux, drying, preheating, wave soldering, and cooling...

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We know that the main production process of PCBA includes: solder paste printing, SMT patch, reflow soldering, DIP plug-in, wave soldering. So what is the first piece of wave soldering? The workflow is roughly as follows:

 

1. Use an automatic board loading machine or manually place the PCB on the conveyor belt (or fixture). The machine automatically completes the operations of spraying flux, drying, preheating, wave soldering, and cooling.

 

2. Catch the PCB at the exit of wave soldering.

 

3. Perform the first welding quality inspection in accordance with the industry standard "Quality Evaluation of Soldering Joints" SJ/T10666-1995 or IPC-A-610E. Adjust the welding parameters according to the welding results of the first piece, and continue mass production only after the quality meets the requirements.

 

 

Under normal circumstances, if there is no problem with other production processes, the circuit board that has been wave soldered can be taken back and assembled into a finished product. But before assembling into a finished product, there is still a very important step that is the first PCBA inspection. I believe some people will wonder why the first piece inspection should be carried out after wave soldering?

 

In layman's terms, if we produce a product that has gone through the production process without inspection, once the quality is abnormal, then the assembled product must be disassembled and repaired again, regardless of labor and time costs, the entire repair The process is also very troublesome. Unless the customer expressly stated that it is not necessary to do the first piece inspection, in other cases, the PCBA processing plant must conduct the first piece inspection after the wave soldering is completed. After the inspection is passed, it is more conservative to confirm with the customer, and then proceed to mass production.

 

Well, today Sanjing will be introduced here, and I hope that the content shared above will be helpful to everyone!

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