Steel mesh wiping paper: SMT steel mesh process of the basic process which steps
The basic process of SMT steel mesh is: mounting - screen printing - dispensing - reflow welding - curing - inspection - cleaning - repair
1. Mounting: the function of this device is to install the surface assembly components to the fixed position of PCB accurately. The equipment used is placement machine, which is located behind the screen printing machine in SMT steel mesh production line.
2. Screen printing: the function is to misprint the solder paste or patch glue onto the PCB pad, to prepare for the welding of components. The equipment used is silk screen printing machine (screen printing machine), which is located at the front end of SMT steel mesh production line.
3. Glue dispensing: it drops glue onto the fixed position of PCB. Its main function is to fix components to PCB board. The dispensing machine is located at the front of SMT steel mesh production line or behind the inspection equipment.
4. Reflow welding: the function of reflow welding is to melt the solder paste and make the surface assembled components and PCB solid bonding together. The equipment used is reflow welding furnace, which is located behind the mounter in SMT steel mesh production line.
5. Solidification: the effect is to melt the patch adhesive, so that the surface assembled components and PCB solid bonding together. The equipment used is curing furnace, which is located behind the SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT SMT.
6. Inspection: the function is to check the welding quality and installation quality of assembled PCB boards. The equipment used includes magnifying glass, microscope, on-line tester (ict), flying needle tester, active optical inspection (aoi), X-ray inspection system, functional tester, etc. Location according to inspection requirements, can be equipped in the appropriate location of the production line.
7. Cleaning: the function is to remove the harmful welding residue such as flux on the assembled PCB board. The equipment used is cleaning machine, the position can not be fixed, can be online, not online.
8. Repair: this function is to rework the defective PCB board. Things used for soldering iron, repair workstation, etc.
