What equipment is required for SMT patch processing?
The equipment required for SMT placement processing includes solder paste printers, placement machines, reflow soldering, AOI detectors, parts trimming machines, etc.; it has high assembly density, high reliability, strong vibration resistance, and low solder joint defect rate ,
The equipment required for SMT placement processing includes solder paste printers, placement machines, reflow soldering, AOI detectors, parts trimming machines, etc.; it has high assembly density, high reliability, strong vibration resistance, and low solder joint defect rate , The following is a specific introduction to the "equipment and process characteristics required for SMT patch processing".
1. Equipment needed for SMT patch processing
1. Solder paste printing machine
Modern solder paste printers generally consist of plate loading, solder paste addition, imprinting, and power transmission substrates. The working principle is: first fix the printed circuit board on the printing positioning table, and then use the left and right scrapers of the printer to leak the solder paste and red glue to the corresponding pads through the stencil, and input the evenly leaked PCB through the transmission table The placement machine performs automatic placement.
Mounter: also known as mounter, surface mount system (SurfaceMountSystem), after the cream printing machine is configured on the production line, it is the production equipment for correctly configuring the surface mounter through the mobile mounter. According to the installation accuracy and installation speed, it is usually divided into high speed and normal speed.
3. Reflow soldering
There is a heating circuit inside the reflow soldering. After heating the air and nitrogen to a high enough temperature, blow it to the PCB board where the parts are already attached, so that the solder on both sides of the parts is melted and then bonded to the main board. The advantages of this process are that the temperature is easy to control, oxidation can also be avoided during welding, and the production and processing costs are also easy to control.
4. AOI detector
AOI's full name is utomaticOptic principle of production equipment that detects common defects in welding production. AOI is an emerging test technology, but it is developing rapidly, and many manufacturers have introduced AOI test equipment. During automatic inspection, the machine automatically scans the PCB through the camera, collects images, compares the tested solder joints with the qualified parameters in the database, detects the defects of the PCB through image processing, and displays the defects/displays on the display or automatically, and the maintenance personnel repair them.
5. Parts trimming machine
For cutting feet and deformed pin parts.
6. Wave soldering
Peak welding is to make the welding surface of the plug-in board directly contact high-temperature liquid welding to achieve the purpose of welding. The high-temperature liquid welding maintains a slope. Because the special device makes the liquid welding form a wave-like phenomenon, it is called peak welding. The main material is welding rods. .
Second, the technological characteristics of smt patch processing
1. Electronic products with high assembly density and SMD processing technology are small in size and light in weight.
2. High reliability, strong anti-vibration ability, and low solder joint defect rate.
3. Good high frequency characteristics, reducing electromagnetic and radio frequency interference.
4. It is easy to realize automation and improve production efficiency. Reduce costs, save materials, energy, equipment, manpower, time, etc.
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