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SMT cooling conveyor processing flow and matters needing attention

SMT cooling conveyor processing flow and matters needing attention

(Summary description) Solder paste printing: Its function is to print the solder-free paste on the PCB pads to prepare for the soldering of components. The equipment used is a screen printing machine, located at the forefront of the SMT cooling conveyor production line.

SMT cooling conveyor processing flow and matters needing attention

(Summary description) Solder paste printing: Its function is to print the solder-free paste on the PCB pads to prepare for the soldering of components. The equipment used is a screen printing machine, located at the forefront of the SMT cooling conveyor production line.

Information

1. Solder paste printing: Its function is to print the solder-free paste on the PCB pads to prepare for the soldering of components. The equipment used is a screen printing machine, located at the forefront of the SMT cooling conveyor production line.

SMT cooling conveyor
2. Parts placement: its function is to accurately install the surface mount components to the fixed position of the PCB. The equipment used is a placement machine, located behind the screen printing machine in the SMT cooling conveyor production line.
3. Oven curing: its function is to melt the patch glue, so that the surface mount components and the PCB board are firmly bonded together. The equipment used is a curing oven, located behind the SMT cooling conveyor of the placement machine in the SMT production line.
4. Reflow soldering: Its function is to melt the solder paste, so that the surface mount components and the PCB board are firmly bonded together. The equipment used is a reflow oven, located behind the placement machine in the SMT production line.
5. AOI optical inspection: its function is to inspect the welding quality and assembly quality of the assembled PCB board. The equipment used is automatic optical inspection (AOI), and the order quantity is usually more than tens of thousands, and the small order quantity is through manual inspection. The location can be configured in a suitable place on the production line according to the needs of the inspection. Some are before reflow soldering, and some are after reflow soldering.
6. Repair: its function is to repair the PCB board that has failed in the detection. The tools used are soldering irons, rework stations, etc. Configured after AOI optical inspection.

Precautions for processing and production of SMT cooling conveyor:

1. Confirmation of test fixtures: Confirm the conditions of test fixtures and test accessories before production; collection of previous problems.
2. Special material confirmation: confirm the abnormal material before production, and confirm the material once.
3. First article confirmation:
(1) Make a simple understanding and test of the first article, and check the related first article records.
(2) Check whether the previous problem occurs again and whether the hand is improved.
(3) Confirm whether the processing flow and technology of the previous SMT cooling conveyor need to be improved.
 

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