smt pcb assembly

 Why does the PCBA processing still require manual soldering treatment?

In the production process of electronic products, PCBs are transformed into PCBA after SMT mounting, DIP insertion, reflow soldering, wave soldering or manual soldering.

Why is manual soldering still required as automated PCBA service processing technology becomes increasingly advanced?

What is manual soldering treatment?

Manual soldering processing means that after the circuit board undergoes wave soldering, some electronic components that are not suitable for wave soldering are manually soldered using an electric soldering iron.

The reasons for manual soldering treatment

1. Electronic components are not resistant to high temperatures: Due to the implementation of EU RoHS and WEEE regulations, lead-free processes have become increasingly popular in order to comply with customer lead-free processes and meet their needs. During wave soldering, the temperature inside the furnace is higher than that of lead-free processes, so some electronic components that are not resistant to high temperatures cannot pass through wave soldering.

2. Electronic component size is too large: During the wave soldering process, there are certain limitations on the height of electronic components. If the component size is too large, it will not be able to pass through wave soldering.

3. There are few through hole materials: on the circuit board, there will be some through hole materials on the side of the wave soldering. If there is very little through hole material, manual soldering can improve efficiency.

4. Electronic component plug-in too close to the process edge: If the electronic component plug-in is too close to the edge of the board, it will touch the edge of the equipment, affecting normal soldering, so it is suitable to use manual soldering treatment.

5. Special components: For highly sensitive components with special requirements, wave soldering cannot be used for soldering.

Manual soldering is a very important soldering method in the PCBA processing, which can compensate for some defects in wave soldering and improve soldering efficiency.

The advantages of manual soldering in PCBA processing

1. Compensating for problems that machines cannot handle: For some complex PCB boards, small shapes, and irregular components, manual soldering can compensate for problems that machines cannot handle.

2. High precision: Manual soldering by professional technicians can ensure the accuracy and quality of soldering points.

3. Manual adjustment: Manual soldering can correct soldering errors through manual adjustment, thereby improving the quality of PCBA.

4. Wide application range: Compared with machine based production lines, manual soldering has a wider application range and is suitable for processing small batches, high reliability, and high flexibility products.

5. Low cost: Compared to machine based production lines, manual soldering has lower costs.

Although manual soldering is gradually being replaced by automated machinery with the continuous development of automated production, it still exists in certain special circumstances. As a professional PCBA processing manufacturer, Linke Electronics has SMT processing automatic assembly equipment and a skilled manual soldering team, which can choose the appropriate method according to customized requirements.