In the SMT manufacturing process, manual soldering, plate repair and rework is an indispensable process. With the in-depth development of SMT not only components are getting smaller and smaller, but also the emergence of many new packages of components, there is no Pb, no VOC, and other requirements, not only to make the assembly more and more difficult, but also to make the rework work of the difficulty is also constantly upgraded. For high-density, BGA, CSP, QN and other new packages of components, how to carry out rework, how to improve the success rate of rework, how to ensure the quality and reliability of rework, etc., but also SMT manufacturing industry is extremely concerned about the problem. PCBA processing manual soldering what are the errors? Read on together.
1. Excessive pressure, the heat conduction does not help, can only cause oxidation of the soldering iron tip, resulting in dents, so that the pad warping
2. Wrong size, shape and length of the soldering iron tip will affect the heat capacity and the contact area.
3. Excessive temperature and time will make the flux ineffective and increase the thickness of intermetallic compounds.
4. Incorrect placement of the tin wire does not form a thermal bridge. The transfer of material does not transfer heat effectively.
5. Inappropriate use of flux, consuming too much flux can trigger corrosion and electromigration.
6. Unnecessary trimming and reworking can increase intermetallic compounds and affect solder joint strength.
7. Transfer soldering practices will make the flux evaporate off in advance, can not be used in the through-hole components of the welding, welding SMD can be used.
Manual soldering in the daily SMD processing is an important part of many customers’ products in the design stage does not fully take into account the SMD components and plug-in components of a processing process issues, including reflow oven soldering temperature and wave soldering machine temperature differences, resulting in plug-in materials and SMD materials for the temperature sensitivity, or the material is complete on the time, some shaped parts also need to be used for manual welding.
Quick facts about NeoDen
1. Established in 2010, 200+ employees, 8000+ Sq.m. factory
2. NeoDen products: Smart series PNP machine, NeoDen K1830, NeoDen4, NeoDen3V, NeoDen7, NeoDen6, TM220A, TM240A, TM245P, reflow oven IN6, IN12, Solder paste printer FP2636, PM3040
3. Successful 10000+ customers across the globe
4. 30+ Global Agents covered in Asia, Europe, America, Oceania and Africa
5. R&D Center: 3 R&D departments with 25+ professional R&D engineers
6. Listed with CE and got 50+ patents
7. 30+ quality control and technical support engineers, 15+ senior international sales, timely customer responding within 8 hours, professional solutions providing within 24 hours
Post time: Mar-11-2024