Home /News /New /Industry News /How to prevent the problem of pseudo soldering and false soldering in PCBA processing, and what are the methods? /
How to prevent the problem of pseudo soldering and false soldering in PCBA processing, and what are the methods?
2023-12-22
The problem of pseudo soldering and false soldering in PCBA production not only brings great quality hazards to the products, but also has a very bad impact on customers, seriously affects the company's image, and reduces production efficiency and increases production costs. Next, the following methods and measures will be provided for how to prevent the problem of pseudo soldering and false soldering in PCBA processing.
Due to the existence of pseudo welding and false welding, the reliability of the printed board and the overall product is greatly reduced, which causes unnecessary maintenance, increases production costs, reduces production efficiency, and causes great quality and safety hazards to the products that have left the factory, and increases after-sales maintenance costs.
PCBA problem reduction, preventive measures
1. Focus on precautions in the welding process
1.1. Electric soldering iron: whether the soldering iron tip is clean, smooth and non-oxidizing, if there is an oxide layer, the soldering iron tip needs to be wiped clean on the high temperature sponge before soldering; whether the temperature control of the soldering iron is within the required range, the temperature is too high and too low will cause poor soldering, the general temperature is controlled at about 300 degrees to 360 degrees, and the welding time is less than 5 seconds; different power and types of electric soldering iron should be selected according to the size of different parts and soldering joints and the shape of the device.
1.2. Solder wire: select high-quality solder wire, (63% tin, 37% lead) solder dosage should be appropriate, solder joints should be soldered wetting pads, and the holes should also be wetted and filled.
1.3. Other materials and tools: use flux correctly, check whether the equipment is normal when using soldering auxiliary equipment, and operate in accordance with the operating instructions and precautions. Maintain the equipment in time after use. (Semi-automatic soldering machine, crimping pliers, etc.)
1.4. Check whether the device pins are oxidized before soldering, and whether the wires, solder lugs or transformer pins are oxidized. For oxidized devices, it is necessary to remove the oxide layer first and then solder, so as to prevent the existence of an oxide layer in the device, resulting in pseudo soldering and false soldering of the device. The welding material and environment should be kept clean to prevent the presence of stains and dust from causing poor welding.
2. Strictly implement the relevant process regulations, give full play to the role of self-inspection, mutual inspection and quality inspection in the production process, and improve the pass rate of inspection through some necessary tools and tooling.
3. Relevant departments carry out targeted skills and knowledge training to improve employees' own operation skills, explain the hazards of the above problems to employees, improve the sense of responsibility of production employees, and take necessary documents to ensure the correctness and reliability of production.
4. The quality control department should strengthen the inspection of relevant issues, and take special reward and punishment measures on the basis of the existing "quality assessment system" for special and outstanding problems.
In the final analysis, the problem of pseudo welding and false welding in welding is the problem of employees' sense of responsibility and operation skills, and employees should be allowed to truly form a sense of product quality, improve their sense of responsibility and strengthen their operating skills, improve production from various aspects such as devices, tools, and related systems, and try to reduce and prevent the occurrence of unqualified problems such as virtual welding and false welding to the greatest extent.
The difference between reflow soldering and wave soldering in PCBA processing
What are the reasons for the serious heating of the PCBA board?
SEND MESSAGE