With the rapid development of science and technology, as the electrical connection carrier of electronic components, PCBs are gradually moving towards miniaturization and precision, and electronic components are also becoming smaller. This puts forward higher requirements for SMT mounting technology. In order to produce high-quality PCBA products, it is necessary to pay attention to the following four points during the SMT mounting process.
1. Check SMT mounting equipment on time
The SMT mounting machine is a complex, high-tech, and high-precision machine. Therefore, during the SMT mounting process, the requirements for SMT mounting equipment have become stricter. In order to ensure accuracy during the SMT mounting process, it is necessary to check the equipment of the mounting machine on time.
2. The solder paste needs to be stored correctly
For newly purchased solder paste, if not immediately used, it must be stored in an environment of 2-10 ° C. In order to ensure the effectiveness of the solder paste, it does not need to be stored in freezing below zero. At the same time, the solder paste should be stored separately according to batch number, different manufacturers, types, etc. When stored in refrigeration, the principle of first in, first out should be followed.
If there are equipment aging issues or some machine parts have been damaged, in order to prevent the occurrence of skewed patches and high throwing of materials, it is necessary to strictly inspect the installation equipment. Only in this way can production costs be reduced and SMT installation production efficiency be provided during the installation process.
3. SMT mounting inspection
In order to ensure the quality of SMT mounting products, online SPI testing and online AOI testing are two important tests that need to be carried out during the SMT mounting process. Online SPI testing is mainly aimed at solder paste detection systems, and the main purpose is to detect the quality of solder paste printing, including volume, area, height, XY offset, shape, bridging, etc. Before reflow soldering process, solder paste printing testing can be carried out to reduce repair costs and the possibility of scrap, Effectively saving costs; Online AOI detection mainly involves machines automatically scanning PCB and mobile phone images through cameras, comparing solder joints with qualified parameters in the database, detecting defects on the PCB, and representing them through AOI detectors or automatic labels. Choosing AOI detection can reduce PCB failure rates, reduce time costs, and labor costs.
4. Parameters for detecting reflow soldering
In order to ensure the quality of PCB board welding, it is necessary to focus on observing whether the setting of welding process parameters during the welding process is reasonable. If the parameter setting is incorrect, the quality of SMT installation cannot be guaranteed. Therefore, in order to ensure normal quality, it is necessary to conduct two furnace temperature tests on time, continuously improve the temperature curve, and set the temperature curve of the welding product, in order to ensure that the product processing quality is not affected.
In short, in order to ensure the quality of SMT mount products, strict control must be carried out during the SMT mount processing process to ensure the guarantee of mount products. As a one-stop PCBA manufacturing service provider, Kuaifa Intelligent Manufacturing can not only provide PCB assembly (SMT mount+DIP mount), but also one-stop services such as PCB design, DFM services, component procurement, assembly testing, etc. If you have a PCBA one-stop processing demand, You can choose PCBA one-stop processing manufacturer from Shenzhen Baiqiancheng Electronics Co., Ltd. Full process, full industry chain. Mainly focusing on fields such as healthcare, new energy, automotive electronics, security, communication, AI artificial intelligence, etc.
