PCBA is the abbreviation for Printed Circuit Board Assembly, which means that the entire process of PCB blank board passes through SMT loading and then passes through a DIP plug-in, abbreviated as PCBA.
PCBA processing is an electronic processing industry with a high degree of integration of mechanical equipment. The increasingly mature use of processing machinery and the improvement of manufacturing processes have led to continuous improvement in the yield and efficiency of PCBA-processed products. The commonly used processing equipment in PCBA processing includes the following types, such as double-sided PCB assembly:
1. Printing machine
The printing machine is located at the front end of the PCBA processing production line, mainly used for PCB circuit board printing solder paste or chip adhesive. The workflow is to align the mesh of the printing machine’s steel mesh with the PCB pad, and through the movement of the scraper, leak the solder paste or patch adhesive placed on the steel mesh onto the PCB pad or corresponding position, preparing for the installation of components in the subsequent process of PCBA processing.
2. Dispensing machine
The main purpose of the dispensing machine is to apply solder paste or patch adhesive. The workflow is to apply a predetermined amount of adhesive or solder paste to the required position of the PCBA device through the pressure of the vacuum pump. The advantage of the dispensing machine is that it does not require the replacement of production fixtures during the production process, greatly shortening the production cycle, and is suitable for small batch and multi-product production.
3. Placement machine
The SMT machine is the core mechanical equipment in PCBA processing, also known as the SMT machine. The main purpose is to accurately remove known materials from the designated location through pre-set conditions and correctly attach them to the designated location. The mounting capacity and production capacity of PCBA processing mainly depends on functional parameters such as the speed and accuracy of the mounting machine. It is also the most technologically advanced, complex, and expensive equipment in the PCBA process. The fully automatic SMT machine is a high-speed, high-precision, highly automated, and highly intelligent equipment that integrates precision machinery, electric, pneumatic, optical, computer, sensing technology, etc.
4. Reflow welding machine
The main purpose is to provide a stable and controllable heating environment, fuse the solder pre-distributed by the printing machine on the PCB circuit board, and ensure that surface mount components and PCB pads are reliably bonded together through solder paste.
5. Testing equipment
The main function of testing equipment is to test the assembly quality and street quality of the installed PCBA. The equipment used mainly includes magnifying glass, microscope, automatic optical detector, online tester, X-ray detection system, functional tester, etc. According to the needs of testing, its installation position is at the corresponding rear position of the production line.
6. Repair equipment
The main function of repair equipment is to rework and repair PCBA products that have failed detection, using tools such as soldering iron and BGA repair bench.
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