PCBA Tech - The process and key points of PCBA ​assembly using torch hand welding

The process and key points of PCBA assembly using torch hand welding
Paying attention to the trend of environmental informationization and the development of various environmental protection technologies, PCB factories can start with big data to monitor corporate pollution and governance results, and find and solve environmental pollution problems in a timely manner. Keep up with the production concept of the new era, continuously improve resource utilization, and realize green production. Efforts to enable the PCB factory industry to achieve an efficient, economical and environmentally friendly production model, and actively respond to the country's environmental protection policy.
1. Clean the rust-free chromium iron tip and welding wire, and contact the position to be welded at the same time, so that the molten tin can quickly adhere and fill. The cotton is removed.

2. Melt in an appropriate amount of tin wire solder and disperse it evenly, and not too much. Among them, the flux can provide the dual functions of cleaning and heat transfer.

3. The tip of the soldering iron must be in continuous contact with the soldering position to provide sufficient heat until the solder is evenly distributed.

4. After completion, be careful when removing the welding torch to avoid disturbance of the solder joints before solidification caused by improper actions, which may damage the strength of the solder joints.

5. When the PCB to be processed is assembled with single-sided parts, and the area to be soldered is large and large, the other panel without parts can be attached to some kind of hot plate for preheating; this will speed up Working speed and reduce the damage of overheating of local board surface, this kind of preheating can also be carried out by special small hot air blower.

6. The tip is a tool for heat transfer and tin filling. The area to be processed should have the largest contact area to reduce the time loss of heat transfer. In order to enhance the efficiency of conveying solder materials, it is necessary to maintain good solderability on the surface and not cause accumulation of various residues. Once the soldering iron tip is oxidized or excessively contaminated, it must be replaced.

7. For hand welding of small parts or thin legs, in order to avoid overheating damage, additional temporary heat dissipation accessories, such as metal alligator clips, can be added.
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